Re: [Emc-users] Emc-users Digest, Vol 60, Issue 71

[andy pugh]

On 29 April 2011 00:58, Ralph Stirling  wrote:
> Is it possible to zero an axis position counter from inside
> a G-code program?

G10 L2?

http://linuxcnc.org/docs/html/gcode_main.html#sub:G10:-Set-Coordinate


-- 
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Re: [Emc-users] Emc-users Digest, Vol 60, Issue 71

[Ralph Stirling]

Is it possible to zero an axis position counter from inside
a G-code program?  I don't want to have a full homing
sequence for a specialized application (not machining), and
just want to zero the position on command.  Alternatively,
is there a parameter number that stores the current
position that I can read and possibly write?

I have tried connecting motion.digital-out-00 to axis.0.home-sw-in,
but I think that would only work in a full homing sequence, and
I don't know of a way to initiate a homing sequence from inside
a G-code program.

This is a stepper based system.

Thanks,
-- Ralph
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Re: [Emc-users] Vacuum table

[Jack Coats]

http://www.instructables.com/id/Vaccum-Table-for-Mini-CNC-Milling-Machine/step2/Make-the-Vaccum-Table/

and

http://www.talkshopbot.com/forum/showthread.php?t=5511 .. old thread
but good on making a vacuum table

and

http://shopbotwiki.com/index.php?title=VacuumMain

I found this presentation on how to build one.  I may take it down in
a couple of days, I can't seem to find the
original source: https://docs.google.com/present/view?id=dgk73zm4_383gfkm8kfv

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Re: [Emc-users] Router Cutter v Milling Cutter

[H & J Johnson]

Too true Les! Being as we're not all using the same machines it does have a big 
impact on how stuff 'works'. 

Jarrett Johnson

- Original Message -
From: Les Newell 
Date: Thursday, April 28, 2011 4:21 pm
Subject: Re: [Emc-users] Router Cutter v Milling Cutter

> It does depend on what you are cutting. Most of the work I do on 
> that 
> machine is 12mm and 18mm MDF. Generally I use two passes, one deep 
> and 
> one shallow. If I use two even passes or one full depth pass I 
> tend to 
> get problems with the parts moving as the vacuum bed on that 
> machine 
> isn't particularly powerful.
> 
> As is so often the case there are few hard and fast rules. What 
> works 
> great for one person doesn't work so well for someone else.
> 
> Les
> 
> On 28/04/11 23:01, H & J Johnson wrote:
> > Les, I've run it faster w/ a lighter cut but I found that my 
> best material removal rate vs accuracy was more in the 1/2-3/4" at 
> the 100ipm.
> > I used to use solidcarbide spiral type cutters, as well as 
> compression cutters etc. But I've since gone back to straight
> > cutters where possible [for cutting wood or wood products]. The 
> finish quality on the spiral cutters just wasn't up to snuff
> > w/ the standard router bit type cutters [straight edges].With 
> the spiral type cutters the chance of chipping the top edge
> > was alot higher [and random], even when using compression 
> cutters, which were better. The issue I had w/ compression
> > cutters was that I wasn't always just routing to a net shape but 
> instead slotting or cutting a recess in the face etc. This would
> > only use the bottom [upcut] part of the bit and still allow the 
> chipping issue.  I'm not sure why this is but I now rarely have 
> edge chipping or
> > edges that need dressing or touch up [I attribute it to the sqr 
> cutting edge not being an 'up or down' shear cutting action].
> >
> > W/ the sqr bits almost 100% of the stuff is usable straight off 
> the table. The chipping was my
> > main concern [ie;13 ply Baltic Birch] but once I went back to 
> the sqr cutters that has disappeared as an 'issue'.
> >
> > I certainly don't mind as the sqr router bits are a fair bit 
> less money than the fancy spiral and compression cutting bits. The 
> only> negative is that you can't plung w/ them, but a 15deg ramp 
> is no problem. A small price to pay for the job they do [just my
> > opinon].
> >
> > I buy alot of my tools from Toolstoday.com
> >
> >
> > Jarrett Johnson
> 
> 
> ---
> ---
> WhatsUp Gold - Download Free Network Management Software
> The most intuitive, comprehensive, and cost-effective network 
> management toolset available today.  Delivers lowest initial 
> acquisition cost and overall TCO of any competing solution.
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Re: [Emc-users] Vacuum table

[gene heskett]

On Thursday, April 28, 2011 06:32:02 PM Viesturs Lācis did opine:

> My apologies, but I think that I do not understand, what do You mean
> 
Language diffs Viesturs, we tend to call some stuff by generic names that 
are actually brand names for products on this side of the pond.  They may 
have different names for what is essentially the same product on your side 
of the pond.

> :) What is peg board

"peg board" is a composite fiber board, not more than 1/4" thick, 
perforated with 1/4" holes for the 1/4" thick variety, or slightly fat 1/8" 
holes for the 1/8" thick variety, on a 1" square pattern all over the 
board.  The material of the board is, ANAICT, identical to the un-
perforated board commonly sold on this side of the pond as "Tempered 
Masonite"

They sell wire forms that plug into these holes, into which one can hang up 
his tools with.  But at the asking prices they should be better than zinc 
plated. ;)
 
> and shop vac?

Is a no-frills brand name, made in Williamsport Pennsylvania, of a utility 
vacuum cleaner that is sold for almost any use, wet or dry.  I would 
imagine there is a similar product sold on the other side of the pond for 
10% of the asking price for a Fein Vacuum.

The cheapest model right now is called the Bucket-Max, and is the usual 
lift off power head with a foam/paper filter that fits the top of any 
utility 5 gallon bucket, sold for $19.95 for the powerhead and a too short 
hose, and the bucket is about $2.75 on this side of the pond.  I have 
several of various sizes, and the oldest one, over 20 years old now, 
probably has 1000 hours on it.  It has no excuse to still be running, but 
it is.

> I am considering any viable solution and in search for options I am
> now in process of reading a thread in CNCZone about vacuum tables...

The peg board idea sounds good, but the vacuum will require either letting 
it conform to the table for flatness, or be built as the top of what is 
called a torsion box for stiffness in the face of the applied pressure from 
the vacuum.  The conformable version I would make from MDF, with air 
channels milled in the top to intersect with the holes which also go to a 
side connector for the vacuum hose.  It would need to be well sealed with 
shellac or whatever to reduce the porosity of the MDF.  If all the pieces 
are the same size, you could make just one of these sandwiches sized so 
that the workpiece covered all the holes for sealing, otherwise wide tape 
from the workpiece out to cover any exposed holes would be needed.  Or just 
mill the grooves in the MDF to cover just the workpiece, seal it, and lay 
the workpiece directly on the MDF & let the vacuum hold it.  

Hopefully I am painting a helpful word picture here.

> Viesturs
> 
> 2011/4/28 Kyle Kerr :
> > Have you given any thought to peg board, a frame, and a shop vac?
> > 
> > On Thu, Apr 28, 2011 at 11:41 AM, R. van Twisk  wrote:
> >> Viesturs,
> >> 
> >> I know a number of people on the Mechmate forum do have experiences
> >> in that area including photo's and type of vacuum systems used.
> >> 
> >> Ries
> >> 
> >> On Apr 28, 2011, at 10:38 AM, Viesturs Lācis wrote:
> >>> Hello, folks!
> >>> 
> >>> Has anyone ever built a vacuum table? I need a solution to hold down
> >>> plywood with vacuum for a router.
> >>> I have been googling to find something useful, and I would like to
> >>> ask, if any of list members could share their experience or a good
> >>> source of information about efficient and cost-effective vacuum
> >>> table.
> >>> 
> >>> Thanks in advance!
> >>> Viesturs
> >>> 
> >>> 
> >>> -- WhatsUp Gold - Download Free Network Management Software
> >>> The most intuitive, comprehensive, and cost-effective network
> >>> management toolset available today.  Delivers lowest initial
> >>> acquisition cost and overall TCO of any competing solution.
> >>> http://p.sf.net/sfu/whatsupgold-sd
> >>> ___
> >>> Emc-users mailing list
> >>> Emc-users@lists.sourceforge.net
> >>> https://lists.sourceforge.net/lists/listinfo/emc-users
> >> 
> >> -
> >> - WhatsUp Gold - Download Free Network Management Software
> >> The most intuitive, comprehensive, and cost-effective network
> >> management toolset available today.  Delivers lowest initial
> >> acquisition cost and overall TCO of any competing solution.
> >> http://p.sf.net/sfu/whatsupgold-sd
> >> ___
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Re: [Emc-users] Router Cutter v Milling Cutter

[Les Newell]

It does depend on what you are cutting. Most of the work I do on that 
machine is 12mm and 18mm MDF. Generally I use two passes, one deep and 
one shallow. If I use two even passes or one full depth pass I tend to 
get problems with the parts moving as the vacuum bed on that machine 
isn't particularly powerful.

As is so often the case there are few hard and fast rules. What works 
great for one person doesn't work so well for someone else.

Les

On 28/04/11 23:01, H & J Johnson wrote:
> Les, I've run it faster w/ a lighter cut but I found that my best material 
> removal rate vs accuracy was more in the 1/2-3/4" at the 100ipm.
> I used to use solidcarbide spiral type cutters, as well as compression 
> cutters etc. But I've since gone back to straight
> cutters where possible [for cutting wood or wood products]. The finish 
> quality on the spiral cutters just wasn't up to snuff
> w/ the standard router bit type cutters [straight edges].With the spiral type 
> cutters the chance of chipping the top edge
> was alot higher [and random], even when using compression cutters, which were 
> better. The issue I had w/ compression
> cutters was that I wasn't always just routing to a net shape but instead 
> slotting or cutting a recess in the face etc. This would
> only use the bottom [upcut] part of the bit and still allow the chipping 
> issue.  I'm not sure why this is but I now rarely have edge chipping or
> edges that need dressing or touch up [I attribute it to the sqr cutting edge 
> not being an 'up or down' shear cutting action].
>
> W/ the sqr bits almost 100% of the stuff is usable straight off the table. 
> The chipping was my
> main concern [ie;13 ply Baltic Birch] but once I went back to the sqr cutters 
> that has disappeared as an 'issue'.
>
> I certainly don't mind as the sqr router bits are a fair bit less money than 
> the fancy spiral and compression cutting bits. The only
> negative is that you can't plung w/ them, but a 15deg ramp is no problem. A 
> small price to pay for the job they do [just my
> opinon].
>
> I buy alot of my tools from Toolstoday.com
>
>
> Jarrett Johnson


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Re: [Emc-users] Router Cutter v Milling Cutter

[H & J Johnson]

Les, I've run it faster w/ a lighter cut but I found that my best material 
removal rate vs accuracy was more in the 1/2-3/4" at the 100ipm. 
I used to use solidcarbide spiral type cutters, as well as compression cutters 
etc. But I've since gone back to straight
cutters where possible [for cutting wood or wood products]. The finish quality 
on the spiral cutters just wasn't up to snuff
w/ the standard router bit type cutters [straight edges].With the spiral type 
cutters the chance of chipping the top edge
was alot higher [and random], even when using compression cutters, which were 
better. The issue I had w/ compression
cutters was that I wasn't always just routing to a net shape but instead 
slotting or cutting a recess in the face etc. This would
only use the bottom [upcut] part of the bit and still allow the chipping issue. 
 I'm not sure why this is but I now rarely have edge chipping or 
edges that need dressing or touch up [I attribute it to the sqr cutting edge 
not being an 'up or down' shear cutting action].

W/ the sqr bits almost 100% of the stuff is usable straight off the table. The 
chipping was my
main concern [ie;13 ply Baltic Birch] but once I went back to the sqr cutters 
that has disappeared as an 'issue'. 

I certainly don't mind as the sqr router bits are a fair bit less money than 
the fancy spiral and compression cutting bits. The only 
negative is that you can't plung w/ them, but a 15deg ramp is no problem. A 
small price to pay for the job they do [just my
opinon].

I buy alot of my tools from Toolstoday.com


Jarrett Johnson

- Original Message -
From: Les Newell 
Date: Thursday, April 28, 2011 3:43 pm
Subject: Re: [Emc-users] Router Cutter v Milling Cutter

> That feed looks a little slow to me. I regularly run 4m/min 
> (160IPM) at 
> 18k RPM with a single flute 1/2" replaceable tip cutter. 
> Admittedly I 
> tend towards shallower DOC, say 10 - 12mm for a full cut. IME, for 
> spiral or PCD cutters to justify their extra cost you need to 
> really 
> work them hard. If you are running at lower speeds/feeds ordinary 
> cheap 
> 2 flute carbide cutters work well enough.
> 
> Les
> 
> On 28/04/11 18:45, H & J Johnson wrote:
> > As a comparison I typically route wood at +/-100ipm [80-130 
> typically] and 1/2" cutter at 1/2"-3/4" DOC. At these speeds a 
> full cut is possible, but
> > you need to be cranking at 18K or so [using a 3hp spindle]. This 
> equates to a 0.011" chip on  a bit w/ two cutting edges  (100ipm x 
> 2)/18000rpm= 0.011"/edge.
> >
> > 2500rpm at 8ipm is a 0.0016" chip [assuming the two cutting 
> edges again]  I'd think if you ran it faster [IPM] it would work
> > better and last longer. When I'm done cutting I can grab the 
> cutter right out of the spindle and its not even hardly warm
> > [certainly not 'hot']. They don't last forever but I have been 
> able to get many thousands of inches from a good quality carbide 
> router> bit.
> >
> > This is in cutting both MDF and various solid and laminated woods.
> >
> > FWIW
> >
> > Jarrett Johnson
> >
> 
> 
> ---
> ---
> WhatsUp Gold - Download Free Network Management Software
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> management toolset available today.  Delivers lowest initial 
> acquisition cost and overall TCO of any competing solution.
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Re: [Emc-users] HAL: input-output pin wired to a only input or only output pin

[andy pugh]

On 28 April 2011 18:12, Javier Ros  wrote:

> Will this give an error or is it possible?.

Probably less typing to do it in Hal and see than to ask the question,
to be honest.

If it doesn't work it should be fairly easy to write a HAL function to
convert IO to I and O pins and vice-versa.

I think you might have trouble with AND writing to the output IO pin
every thread. A comp has the option of only writing to the pin when a
condition is met, and leaving it unchanged otherwise.

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Re: [Emc-users] Router Cutter v Milling Cutter

[Les Newell]

That feed looks a little slow to me. I regularly run 4m/min (160IPM) at 
18k RPM with a single flute 1/2" replaceable tip cutter. Admittedly I 
tend towards shallower DOC, say 10 - 12mm for a full cut. IME, for 
spiral or PCD cutters to justify their extra cost you need to really 
work them hard. If you are running at lower speeds/feeds ordinary cheap 
2 flute carbide cutters work well enough.

Les

On 28/04/11 18:45, H & J Johnson wrote:
> As a comparison I typically route wood at +/-100ipm [80-130 typically] and 
> 1/2" cutter at 1/2"-3/4" DOC. At these speeds a full cut is possible, but
> you need to be cranking at 18K or so [using a 3hp spindle]. This equates to a 
> 0.011" chip on  a bit w/ two cutting edges  (100ipm x 2)/18000rpm= 
> 0.011"/edge.
>
> 2500rpm at 8ipm is a 0.0016" chip [assuming the two cutting edges again]  I'd 
> think if you ran it faster [IPM] it would work
> better and last longer. When I'm done cutting I can grab the cutter right out 
> of the spindle and its not even hardly warm
> [certainly not 'hot']. They don't last forever but I have been able to get 
> many thousands of inches from a good quality carbide router
> bit.
>
> This is in cutting both MDF and various solid and laminated woods.
>
> FWIW
>
> Jarrett Johnson
>


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Re: [Emc-users] Vacuum table

[Jack Coats]

Another option if you want to use MDF, is to get it cut, then 'paint'
the MDF edges
with a half water, half wood glue (thin the glue) and paint it on the
MDF edges (wherever
the surface is not really flat) and that will fill the voids and keep
it from 'leaking'.

Most peg board I have seen is NOT MDF.  It is 'press board', think of
taking layers of
paper and gluing them together, where MDF is fine sawdust glued
together.  The paper
adds a lot of strength to the board stock.

On Thu, Apr 28, 2011 at 4:06 PM, Viesturs Lācis
 wrote:
> Ok, thanks for the explanation!
> Well, from my readings it seems that MDF is not a good choice, because
> it is porous material and needs some additional treatment to have it
> hold the vacuum. I believe that plywood would be better.
>
> Viesturs
>
> 2011/4/28 BRIAN GLACKIN :
>> peg board is a perforated MDF sheet.  Its typically 0.25 inches thick.  Its
>> used to hook hangers on for tools and other items.
>>
>> On Thu, Apr 28, 2011 at 4:10 PM, Viesturs Lācis 
>> wrote:
>>
>>> My apologies, but I think that I do not understand, what do You mean
>>> :) What is peg board and shop vac?
>>> I am considering any viable solution and in search for options I am
>>> now in process of reading a thread in CNCZone about vacuum tables...
>>>
>>> Viesturs
>>>
>>> 2011/4/28 Kyle Kerr :
>>>  > Have you given any thought to peg board, a frame, and a shop vac?
>>> >
>>> > On Thu, Apr 28, 2011 at 11:41 AM, R. van Twisk  wrote:
>>> >> Viesturs,
>>> >>
>>> >> I know a number of people on the Mechmate forum do have experiences
>>> >> in that area including photo's and type of vacuum systems used.
>>> >>
>>> >> Ries
>>> >> On Apr 28, 2011, at 10:38 AM, Viesturs Lācis wrote:
>>> >>
>>> >>> Hello, folks!
>>> >>>
>>> >>> Has anyone ever built a vacuum table? I need a solution to hold down
>>> >>> plywood with vacuum for a router.
>>> >>> I have been googling to find something useful, and I would like to
>>> >>> ask, if any of list members could share their experience or a good
>>> >>> source of information about efficient and cost-effective vacuum table.
>>> >>>
>>> >>> Thanks in advance!
>>> >>> Viesturs
>>> >>>

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Re: [Emc-users] Vacuum table

[Edward Bernard]

Just as a point of interest, on large commercial wood routers a large (>10 hp) 
vacuum pump is used to draw the vacuum directly through an MDF spoilbard. 






From: Viesturs Lācis 
To: Enhanced Machine Controller (EMC) 
Sent: Thu, April 28, 2011 4:06:36 PM
Subject: Re: [Emc-users] Vacuum table

Ok, thanks for the explanation!
Well, from my readings it seems that MDF is not a good choice, because
it is porous material and needs some additional treatment to have it
hold the vacuum. I believe that plywood would be better.

Viesturs

2011/4/28 BRIAN GLACKIN :
> peg board is a perforated MDF sheet.  Its typically 0.25 inches thick.  Its
> used to hook hangers on for tools and other items.
>
> On Thu, Apr 28, 2011 at 4:10 PM, Viesturs Lācis 
>wrote:
>
>> My apologies, but I think that I do not understand, what do You mean
>> :) What is peg board and shop vac?
>> I am considering any viable solution and in search for options I am
>> now in process of reading a thread in CNCZone about vacuum tables...
>>
>> Viesturs
>>
>> 2011/4/28 Kyle Kerr :
>>  > Have you given any thought to peg board, a frame, and a shop vac?
>> >
>> > On Thu, Apr 28, 2011 at 11:41 AM, R. van Twisk  wrote:
>> >> Viesturs,
>> >>
>> >> I know a number of people on the Mechmate forum do have experiences
>> >> in that area including photo's and type of vacuum systems used.
>> >>
>> >> Ries
>> >> On Apr 28, 2011, at 10:38 AM, Viesturs Lācis wrote:
>> >>
>> >>> Hello, folks!
>> >>>
>> >>> Has anyone ever built a vacuum table? I need a solution to hold down
>> >>> plywood with vacuum for a router.
>> >>> I have been googling to find something useful, and I would like to
>> >>> ask, if any of list members could share their experience or a good
>> >>> source of information about efficient and cost-effective vacuum table.
>> >>>
>> >>> Thanks in advance!
>> >>> Viesturs
>> >>>
>> >>>
>> 
--
>> >>> WhatsUp Gold - Download Free Network Management Software
>> >>> The most intuitive, comprehensive, and cost-effective network
>> >>> management toolset available today.  Delivers lowest initial
>> >>> acquisition cost and overall TCO of any competing solution.
>> >>> http://p.sf.net/sfu/whatsupgold-sd
>> >>> ___
>> >>> Emc-users mailing list
>> >>> Emc-users@lists.sourceforge.net
>> >>> https://lists.sourceforge.net/lists/listinfo/emc-users
>> >>
>> >>
>> >>
>> 
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>> >> The most intuitive, comprehensive, and cost-effective network
>> >> management toolset available today.  Delivers lowest initial
>> >> acquisition cost and overall TCO of any competing solution.
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>> >>
>> >
>> >
>> 
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>> > The most intuitive, comprehensive, and cost-effective network
>> > management toolset available today.  Delivers lowest initial
>> > acquisition cost and overall TCO of any competing solution.
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>>
>>
>> 
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Re: [Emc-users] Vacuum table

[Jack Coats]

http://www.talkshopbot.com/forum/ is shopbot oriented, but it is not
exclusively for shopbot users.
http://www.shopbottools.com/files/SBDocs/SBG00284051220VacuumHoldDown.pdf

The second link is a great PDF on vac hold downs, but their
implementation is $$$ mainly because they are using a really high end
vacuum pump (10HP I think!)
but they have had other implementations that use two Festool shopvacs.
(higher end, efficient, quiet(er), but again, pricy).

There are lots of links elsewhere as well.

http://www.buildyourtools.com/phpBB3/viewtopic.php?f=8&t=1403 is
another good thread on the subject.

... I hope this helps.

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Re: [Emc-users] Vacuum table

[andy pugh]

On 28 April 2011 22:06, Viesturs Lācis  wrote:
> Ok, thanks for the explanation!
> Well, from my readings it seems that MDF is not a good choice, because
> it is porous material and needs some additional treatment to have it
> hold the vacuum.

I think trying to hold the vacuum is a mistake.

The trick is to have plenty of flowrate and quite a poor vacuum.
0.5atm is easy to achieve, 0.001atm is harder, 0.001is really,
really hard. But the second 2 are only twice the hold-down force of
the first.

The large number of holes are more of a leak than the porous MDF, the
trick is to have enough flowrate to still have a decent vacuum
underneath (though you can block of most of the unused ones with bits
of paper).

Caveat: I have never actually used a vacuum table. :-)

-- 
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"Torque wrenches are for the obedience of fools and the guidance of wise men"

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Re: [Emc-users] Router Cutter v Milling Cutter

[andy pugh]

On 28 April 2011 21:27, Ian W. Wright  wrote:

> Have you tried RDG tools - www.rdgtools.co.uk

Yes, I know them well. (and Chronos too).

However I was limiting myself to vendors I could get things from
today, as I am going on holiday for a few weeksm but wanted to get
cracking.

Also very cheap, but in China is somewhere I was told about on the IRC:
http://www.ctctools.biz

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Re: [Emc-users] Vacuum table

[Viesturs Lācis]

Ok, thanks for the explanation!
Well, from my readings it seems that MDF is not a good choice, because
it is porous material and needs some additional treatment to have it
hold the vacuum. I believe that plywood would be better.

Viesturs

2011/4/28 BRIAN GLACKIN :
> peg board is a perforated MDF sheet.  Its typically 0.25 inches thick.  Its
> used to hook hangers on for tools and other items.
>
> On Thu, Apr 28, 2011 at 4:10 PM, Viesturs Lācis 
> wrote:
>
>> My apologies, but I think that I do not understand, what do You mean
>> :) What is peg board and shop vac?
>> I am considering any viable solution and in search for options I am
>> now in process of reading a thread in CNCZone about vacuum tables...
>>
>> Viesturs
>>
>> 2011/4/28 Kyle Kerr :
>>  > Have you given any thought to peg board, a frame, and a shop vac?
>> >
>> > On Thu, Apr 28, 2011 at 11:41 AM, R. van Twisk  wrote:
>> >> Viesturs,
>> >>
>> >> I know a number of people on the Mechmate forum do have experiences
>> >> in that area including photo's and type of vacuum systems used.
>> >>
>> >> Ries
>> >> On Apr 28, 2011, at 10:38 AM, Viesturs Lācis wrote:
>> >>
>> >>> Hello, folks!
>> >>>
>> >>> Has anyone ever built a vacuum table? I need a solution to hold down
>> >>> plywood with vacuum for a router.
>> >>> I have been googling to find something useful, and I would like to
>> >>> ask, if any of list members could share their experience or a good
>> >>> source of information about efficient and cost-effective vacuum table.
>> >>>
>> >>> Thanks in advance!
>> >>> Viesturs
>> >>>
>> >>>
>> --
>> >>> WhatsUp Gold - Download Free Network Management Software
>> >>> The most intuitive, comprehensive, and cost-effective network
>> >>> management toolset available today.  Delivers lowest initial
>> >>> acquisition cost and overall TCO of any competing solution.
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>> >>> ___
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>> >>
>> >>
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>> >> management toolset available today.  Delivers lowest initial
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>> >
>> >
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Re: [Emc-users] Vacuum table

[dave]

 I used just such a beastie for exposing photoresist for circuit boards
about 35 years ago. 

D



On Thu, 2011-04-28 at 15:48 -0400, Kyle Kerr wrote:
> Have you given any thought to peg board, a frame, and a shop vac?
> 
> On Thu, Apr 28, 2011 at 11:41 AM, R. van Twisk  wrote:
> > Viesturs,
> >
> > I know a number of people on the Mechmate forum do have experiences
> > in that area including photo's and type of vacuum systems used.
> >
> > Ries
> > On Apr 28, 2011, at 10:38 AM, Viesturs Lācis wrote:
> >
> >> Hello, folks!
> >>
> >> Has anyone ever built a vacuum table? I need a solution to hold down
> >> plywood with vacuum for a router.
> >> I have been googling to find something useful, and I would like to
> >> ask, if any of list members could share their experience or a good
> >> source of information about efficient and cost-effective vacuum table.
> >>
> >> Thanks in advance!
> >> Viesturs
> >>
> >> --
> >> WhatsUp Gold - Download Free Network Management Software
> >> The most intuitive, comprehensive, and cost-effective network
> >> management toolset available today.  Delivers lowest initial
> >> acquisition cost and overall TCO of any competing solution.
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> >> https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> >
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> 
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Re: [Emc-users] Vacuum table

[BRIAN GLACKIN]

peg board is a perforated MDF sheet.  Its typically 0.25 inches thick.  Its
used to hook hangers on for tools and other items.

On Thu, Apr 28, 2011 at 4:10 PM, Viesturs Lācis wrote:

> My apologies, but I think that I do not understand, what do You mean
> :) What is peg board and shop vac?
> I am considering any viable solution and in search for options I am
> now in process of reading a thread in CNCZone about vacuum tables...
>
> Viesturs
>
> 2011/4/28 Kyle Kerr :
>  > Have you given any thought to peg board, a frame, and a shop vac?
> >
> > On Thu, Apr 28, 2011 at 11:41 AM, R. van Twisk  wrote:
> >> Viesturs,
> >>
> >> I know a number of people on the Mechmate forum do have experiences
> >> in that area including photo's and type of vacuum systems used.
> >>
> >> Ries
> >> On Apr 28, 2011, at 10:38 AM, Viesturs Lācis wrote:
> >>
> >>> Hello, folks!
> >>>
> >>> Has anyone ever built a vacuum table? I need a solution to hold down
> >>> plywood with vacuum for a router.
> >>> I have been googling to find something useful, and I would like to
> >>> ask, if any of list members could share their experience or a good
> >>> source of information about efficient and cost-effective vacuum table.
> >>>
> >>> Thanks in advance!
> >>> Viesturs
> >>>
> >>>
> --
> >>> WhatsUp Gold - Download Free Network Management Software
> >>> The most intuitive, comprehensive, and cost-effective network
> >>> management toolset available today.  Delivers lowest initial
> >>> acquisition cost and overall TCO of any competing solution.
> >>> http://p.sf.net/sfu/whatsupgold-sd
> >>> ___
> >>> Emc-users mailing list
> >>> Emc-users@lists.sourceforge.net
> >>> https://lists.sourceforge.net/lists/listinfo/emc-users
> >>
> >>
> >>
> --
> >> WhatsUp Gold - Download Free Network Management Software
> >> The most intuitive, comprehensive, and cost-effective network
> >> management toolset available today.  Delivers lowest initial
> >> acquisition cost and overall TCO of any competing solution.
> >> http://p.sf.net/sfu/whatsupgold-sd
> >> ___
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> >> https://lists.sourceforge.net/lists/listinfo/emc-users
> >>
> >
> >
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>
>
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Re: [Emc-users] Router Cutter v Milling Cutter

[Ian W. Wright]

Andy, another thought is that Tracey tools in Torquay - 
http://www.tracytools.com  - 
sometimes have carbide burrs cheap and always have HSS end 
mills and slot drills at good prices.

Ian
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Re: [Emc-users] Router Cutter v Milling Cutter

[Ian W. Wright]

Hi Andy,

Have you tried RDG tools - www.rdgtools.co.uk - also there 
are loads of carbide router bits including spiral flute on 
Ebay. I get most of my milling cutters and router bits from 
car boot sales, but then I'm a cheapskate..!!

Ian

Ian W. Wright
Sheffield  UK


On 28/04/2011 15:50, andy pugh wrote:
> On 28 April 2011 15:28, gene heskett  wrote:
>
>> :( I keep forgetting which side of the pond you are on, but is there not a
>> similar retailer catering to the construction trades there?
> Not at the prices you suggest:
> http://www.cromwell.co.uk/static/publication/990/pages/141.pdf
>


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Re: [Emc-users] Vacuum table

[Viesturs Lācis]

My apologies, but I think that I do not understand, what do You mean
:) What is peg board and shop vac?
I am considering any viable solution and in search for options I am
now in process of reading a thread in CNCZone about vacuum tables...

Viesturs

2011/4/28 Kyle Kerr :
> Have you given any thought to peg board, a frame, and a shop vac?
>
> On Thu, Apr 28, 2011 at 11:41 AM, R. van Twisk  wrote:
>> Viesturs,
>>
>> I know a number of people on the Mechmate forum do have experiences
>> in that area including photo's and type of vacuum systems used.
>>
>> Ries
>> On Apr 28, 2011, at 10:38 AM, Viesturs Lācis wrote:
>>
>>> Hello, folks!
>>>
>>> Has anyone ever built a vacuum table? I need a solution to hold down
>>> plywood with vacuum for a router.
>>> I have been googling to find something useful, and I would like to
>>> ask, if any of list members could share their experience or a good
>>> source of information about efficient and cost-effective vacuum table.
>>>
>>> Thanks in advance!
>>> Viesturs
>>>
>>> --
>>> WhatsUp Gold - Download Free Network Management Software
>>> The most intuitive, comprehensive, and cost-effective network
>>> management toolset available today.  Delivers lowest initial
>>> acquisition cost and overall TCO of any competing solution.
>>> http://p.sf.net/sfu/whatsupgold-sd
>>> ___
>>> Emc-users mailing list
>>> Emc-users@lists.sourceforge.net
>>> https://lists.sourceforge.net/lists/listinfo/emc-users
>>
>>
>> --
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>> acquisition cost and overall TCO of any competing solution.
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>>
>
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Re: [Emc-users] Vacuum table

[Kyle Kerr]

Have you given any thought to peg board, a frame, and a shop vac?

On Thu, Apr 28, 2011 at 11:41 AM, R. van Twisk  wrote:
> Viesturs,
>
> I know a number of people on the Mechmate forum do have experiences
> in that area including photo's and type of vacuum systems used.
>
> Ries
> On Apr 28, 2011, at 10:38 AM, Viesturs Lācis wrote:
>
>> Hello, folks!
>>
>> Has anyone ever built a vacuum table? I need a solution to hold down
>> plywood with vacuum for a router.
>> I have been googling to find something useful, and I would like to
>> ask, if any of list members could share their experience or a good
>> source of information about efficient and cost-effective vacuum table.
>>
>> Thanks in advance!
>> Viesturs
>>
>> --
>> WhatsUp Gold - Download Free Network Management Software
>> The most intuitive, comprehensive, and cost-effective network
>> management toolset available today.  Delivers lowest initial
>> acquisition cost and overall TCO of any competing solution.
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>> ___
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>> Emc-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/emc-users
>
>
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Re: [Emc-users] Vacuum table

[Kyle Kerr]

Have you given any thought to peg board, a frame, and a shop vac?

On Thu, Apr 28, 2011 at 11:41 AM, R. van Twisk  wrote:
> Viesturs,
>
> I know a number of people on the Mechmate forum do have experiences
> in that area including photo's and type of vacuum systems used.
>
> Ries
> On Apr 28, 2011, at 10:38 AM, Viesturs Lācis wrote:
>
>> Hello, folks!
>>
>> Has anyone ever built a vacuum table? I need a solution to hold down
>> plywood with vacuum for a router.
>> I have been googling to find something useful, and I would like to
>> ask, if any of list members could share their experience or a good
>> source of information about efficient and cost-effective vacuum table.
>>
>> Thanks in advance!
>> Viesturs
>>
>> --
>> WhatsUp Gold - Download Free Network Management Software
>> The most intuitive, comprehensive, and cost-effective network
>> management toolset available today.  Delivers lowest initial
>> acquisition cost and overall TCO of any competing solution.
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>
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Re: [Emc-users] Router Cutter v Milling Cutter

[H & J Johnson]

As a comparison I typically route wood at +/-100ipm [80-130 typically] and 1/2" 
cutter at 1/2"-3/4" DOC. At these speeds a full cut is possible, but 
you need to be cranking at 18K or so [using a 3hp spindle]. This equates to a 
0.011" chip on  a bit w/ two cutting edges  (100ipm x 2)/18000rpm= 0.011"/edge.

2500rpm at 8ipm is a 0.0016" chip [assuming the two cutting edges again]  I'd 
think if you ran it faster [IPM] it would work 
better and last longer. When I'm done cutting I can grab the cutter right out 
of the spindle and its not even hardly warm
[certainly not 'hot']. They don't last forever but I have been able to get many 
thousands of inches from a good quality carbide router
bit.

This is in cutting both MDF and various solid and laminated woods.

FWIW

Jarrett Johnson
 

- Original Message -
From: gene heskett 
Date: Thursday, April 28, 2011 11:31 am
Subject: Re: [Emc-users] Router Cutter v Milling Cutter

> On Thursday, April 28, 2011 12:51:58 PM BRIAN GLACKIN did opine:
> 
> > I use solid carbide 2 flute up spiral bits (1/8") in MDF for 
> cutting out
> > all kinds of stuff.  I usually get several ours of continous cutting
> > out of a bit (1/8" deep passes at 30-50IPM).
> > 
> So have I, and have broken a couple trying to cut faster than I 
> have 
> spindle rpms for & 1/4" deep, probably pushing my luck a lot 
> farther than I 
> got with the bit. :)  One got so dull it was smoking for the last 
> 1/4" it 
> cut before it snapped off at the face of the collet. 2500 revs, 
> about 8 ipm 
> just doesn't cut it.
> 
> > Hope that adds a data point.
> > 
> And here is another.
> 
> -- 
> Cheers, Gene
> "There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> 
> 
> Have you noticed that all you need to grow healthy, vigorous grass 
> is a
> crack in your sidewalk?
> 
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Re: [Emc-users] Router Cutter v Milling Cutter

[gene heskett]

On Thursday, April 28, 2011 12:51:58 PM BRIAN GLACKIN did opine:

> I use solid carbide 2 flute up spiral bits (1/8") in MDF for cutting out
> all kinds of stuff.  I usually get several ours of continous cutting
> out of a bit (1/8" deep passes at 30-50IPM).
> 
So have I, and have broken a couple trying to cut faster than I have 
spindle rpms for & 1/4" deep, probably pushing my luck a lot farther than I 
got with the bit. :)  One got so dull it was smoking for the last 1/4" it 
cut before it snapped off at the face of the collet. 2500 revs, about 8 ipm 
just doesn't cut it.

> Hope that adds a data point.
> 
And here is another.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)


Have you noticed that all you need to grow healthy, vigorous grass is a
crack in your sidewalk?

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[Emc-users] HAL: input-output pin wired to a only input or only output pin

[Javier Ros]

Hello,

I want to connect the output of an AND gate, to the INDEX-ENABLE io pin of
my card.
I want too, to connect the INDEX-ENABLE io pin of AXIS to one of the inputs
of the AND gate.

Will this give an error or is it possible?.


Thanks,

Javier

PD:
Rationale:

I want to reset two encoder counters using the index pulse of one of them.
The electrical part is easy.

At the HAL configuration level, I plan to connect the AXIS-INDEX-ENABLE io
pin to the first  CARD-INDEX-ENABLE io pin
and to the second CARD-INDEX-ENABLE io pin, through an AND gate that has a
ONE as the other input.

The underlying reason is that I want to compare the errors between both
sensors.
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Re: [Emc-users] Router Cutter v Milling Cutter

[gene heskett]

On Thursday, April 28, 2011 12:41:22 PM dave did opine:

> On Thu, 2011-04-28 at 11:38 -0400, gene heskett wrote:
> > On Thursday, April 28, 2011 10:56:53 AM andy pugh did opine:
> > > On 28 April 2011 15:28, gene heskett  wrote:
> > > > :( I keep forgetting which side of the pond you are on, but is
> > > > :there not a
> > > > 
> > > > similar retailer catering to the construction trades there?
> > > 
> > > Not at the prices you suggest:
> > > http://www.cromwell.co.uk/static/publication/990/pages/141.pdf
> > 
> > Unforch, FF4 and pdf's are currently not speaking to each other very
> > well. So I fed the link to Okular directly, worked a treat.
> > 
> > But those prices are some serious gouging IMO.  I don't know the
> > exchange rate, but the last time I did, it was over 2 dollars a
> > pound, so that price is patently outrageous.  Almost 4x what I would
> > pay here.
> > 
> > I think this calls for some serious google-fu.
> > 
> > I have been getting most of my stuff from an outfit over in Ohio, but
> > I'll have to go to the shop & get their catalog.
> > 
> > Yeah,   You can dl and print their current
> > catalog, which does contain prices in USD.
> > 
> > I see the prices have risen since my 2009 catalog, but these guys
> > never seem to be out of stock, and for shipping here in the states, I
> > have had the order fall off the passing UPS truck the next day at
> > least once.  But even after import duties etc, those prices have got
> > to be better than your link.  But obviously no where near as instant
> > to your location.  That's a bummer.  But perhaps you can take that
> > catalog and beat them into a better price schedule with it?
> 
> Missouri Carbide had a nice sale recently. Bought some roughers that
> work rather nicely.
> 
>  I wonder how TiAlN or TiCN coated tools would stand up. Just thinking
> out loud since JTS had them on sale. ;-) 10 ea gets a really good
> price.
> 
>  www://i...@jstmach.com
> 
> I've been known to mount an inexpensive router (Hitachi) on the bottom
> of my spindle for routing.
 
I have one of those Harbor Freight 25k rpms die grinders mounted 8 or 9 
inches offset to the left, and forward about 3.5" so I can cut tenons on 
the end of a stick in a jig hanging off the left front edge of the table.  
Works great, but yes the dust does collect, all over the place.  I picked 
up a shop-vac "Bucket-Max" the other day to hang on my RO sanders and I 
believe I'll get another and see if it will control that dust too.

> Whatever you do  dust is  going to be a problem.
> 
> HTH
> 
> Dave
> 
> 
> 
> 
> 
> 
> -- WhatsUp Gold - Download Free Network Management Software
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-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)


While you don't greatly need the outside world, it's still very
reassuring to know that it's still there.

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Re: [Emc-users] Router Cutter v Milling Cutter

[BRIAN GLACKIN]

>
> I've been known to mount an inexpensive router (Hitachi) on the bottom
> of my spindle for routing.
>
> I use a $24 HF long shaft electric die grinder


> Whatever you do  dust is  going to be a problem.
>
The EDG does not blow motor cooling air at the bit point so the dust just
piles up around the cutting point.  Since the dust exiting the cut is only
getting accelerated by the bit, small shop vac mounted within 2 inches of
the bit provides enough suction to capture the finest dust.

BG


> HTH
>
> Dave
>
>
>
>
>
>
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Re: [Emc-users] Router Cutter v Milling Cutter

[BRIAN GLACKIN]

I use solid carbide 2 flute up spiral bits (1/8") in MDF for cutting out all
kinds of stuff.  I usually get several ours of continous cutting out of a
bit (1/8" deep passes at 30-50IPM).

Hope that adds a data point.

On Thu, Apr 28, 2011 at 11:38 AM, gene heskett  wrote:

> On Thursday, April 28, 2011 10:56:53 AM andy pugh did opine:
>
> > On 28 April 2011 15:28, gene heskett  wrote:
> > > :( I keep forgetting which side of the pond you are on, but is there
> > > :not a
> > >
> > > similar retailer catering to the construction trades there?
> >
> > Not at the prices you suggest:
> > http://www.cromwell.co.uk/static/publication/990/pages/141.pdf
>
> Unforch, FF4 and pdf's are currently not speaking to each other very well.
> So I fed the link to Okular directly, worked a treat.
>
> But those prices are some serious gouging IMO.  I don't know the exchange
> rate, but the last time I did, it was over 2 dollars a pound, so that price
> is patently outrageous.  Almost 4x what I would pay here.
>
> I think this calls for some serious google-fu.
>
> I have been getting most of my stuff from an outfit over in Ohio, but I'll
> have to go to the shop & get their catalog.
>
> Yeah,   You can dl and print their current
> catalog, which does contain prices in USD.
>
> I see the prices have risen since my 2009 catalog, but these guys never
> seem to be out of stock, and for shipping here in the states, I have had
> the order fall off the passing UPS truck the next day at least once.  But
> even after import duties etc, those prices have got to be better than your
> link.  But obviously no where near as instant to your location.  That's a
> bummer.  But perhaps you can take that catalog and beat them into a better
> price schedule with it?
>
> --
> Cheers, Gene
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> 
> 
> Absence makes the heart go wander.
>
>
> --
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> management toolset available today.  Delivers lowest initial
> acquisition cost and overall TCO of any competing solution.
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Re: [Emc-users] Router Cutter v Milling Cutter

[dave]

On Thu, 2011-04-28 at 11:38 -0400, gene heskett wrote:
> On Thursday, April 28, 2011 10:56:53 AM andy pugh did opine:
> 
> > On 28 April 2011 15:28, gene heskett  wrote:
> > > :( I keep forgetting which side of the pond you are on, but is there
> > > :not a
> > > 
> > > similar retailer catering to the construction trades there?
> > 
> > Not at the prices you suggest:
> > http://www.cromwell.co.uk/static/publication/990/pages/141.pdf
> 
> Unforch, FF4 and pdf's are currently not speaking to each other very well.  
> So I fed the link to Okular directly, worked a treat.
> 
> But those prices are some serious gouging IMO.  I don't know the exchange 
> rate, but the last time I did, it was over 2 dollars a pound, so that price 
> is patently outrageous.  Almost 4x what I would pay here.
> 
> I think this calls for some serious google-fu.
> 
> I have been getting most of my stuff from an outfit over in Ohio, but I'll 
> have to go to the shop & get their catalog.
> 
> Yeah,   You can dl and print their current 
> catalog, which does contain prices in USD.
> 
> I see the prices have risen since my 2009 catalog, but these guys never 
> seem to be out of stock, and for shipping here in the states, I have had 
> the order fall off the passing UPS truck the next day at least once.  But 
> even after import duties etc, those prices have got to be better than your 
> link.  But obviously no where near as instant to your location.  That's a 
> bummer.  But perhaps you can take that catalog and beat them into a better 
> price schedule with it?
> 
Missouri Carbide had a nice sale recently. Bought some roughers that
work rather nicely. 

 I wonder how TiAlN or TiCN coated tools would stand up. Just thinking
out loud since JTS had them on sale. ;-) 10 ea gets a really good
price. 

 www://i...@jstmach.com

I've been known to mount an inexpensive router (Hitachi) on the bottom
of my spindle for routing. 

Whatever you do  dust is  going to be a problem. 

HTH

Dave





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Re: [Emc-users] EMC2 controlling phase driver

[Kirk Wallace]

On Thu, 2011-04-28 at 09:33 +0900, Mark Thomas wrote:
> A quick question. I have EMC2 controlling 3 different machines through
> step/direction drivers I also have an older phase driver which is
> connected to a small lathe using TurboCNC  I believe I have read that
> EMC2 will indeed work with phase drives but am having a hard time
> finding info. Any ideas on where to start?
> 
In case it may help, I think my mill uses a similar (unipolar) setup,
stepgen type 9:
http://www.wallacecompany.com/machine_shop/Shizuoka/

Type 9 is half-stepping, so some phases have one coil active while
others have two coils active. The one-coil phases will have less maximum
torque, but I set my .ini axis parameters to avoid missing steps, so
full-stepping is not required for my setup and I get .0005" resolution.

Reference Links:
http://en.wikipedia.org/wiki/Stepper_motor (see 'unipolar' and 'half
stepping' half way down the page)
http://www.cs.uiowa.edu/~jones/step/ 


-- 
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/index.html
California, USA


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Re: [Emc-users] Vacuum table

[R. van Twisk]

Viesturs,

I know a number of people on the Mechmate forum do have experiences
in that area including photo's and type of vacuum systems used.

Ries
On Apr 28, 2011, at 10:38 AM, Viesturs Lācis wrote:

> Hello, folks!
> 
> Has anyone ever built a vacuum table? I need a solution to hold down
> plywood with vacuum for a router.
> I have been googling to find something useful, and I would like to
> ask, if any of list members could share their experience or a good
> source of information about efficient and cost-effective vacuum table.
> 
> Thanks in advance!
> Viesturs
> 
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[Emc-users] Vacuum table

[Viesturs Lācis]

Hello, folks!

Has anyone ever built a vacuum table? I need a solution to hold down
plywood with vacuum for a router.
I have been googling to find something useful, and I would like to
ask, if any of list members could share their experience or a good
source of information about efficient and cost-effective vacuum table.

Thanks in advance!
Viesturs

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Re: [Emc-users] Router Cutter v Milling Cutter

[gene heskett]

On Thursday, April 28, 2011 10:56:53 AM andy pugh did opine:

> On 28 April 2011 15:28, gene heskett  wrote:
> > :( I keep forgetting which side of the pond you are on, but is there
> > :not a
> > 
> > similar retailer catering to the construction trades there?
> 
> Not at the prices you suggest:
> http://www.cromwell.co.uk/static/publication/990/pages/141.pdf

Unforch, FF4 and pdf's are currently not speaking to each other very well.  
So I fed the link to Okular directly, worked a treat.

But those prices are some serious gouging IMO.  I don't know the exchange 
rate, but the last time I did, it was over 2 dollars a pound, so that price 
is patently outrageous.  Almost 4x what I would pay here.

I think this calls for some serious google-fu.

I have been getting most of my stuff from an outfit over in Ohio, but I'll 
have to go to the shop & get their catalog.

Yeah,   You can dl and print their current 
catalog, which does contain prices in USD.

I see the prices have risen since my 2009 catalog, but these guys never 
seem to be out of stock, and for shipping here in the states, I have had 
the order fall off the passing UPS truck the next day at least once.  But 
even after import duties etc, those prices have got to be better than your 
link.  But obviously no where near as instant to your location.  That's a 
bummer.  But perhaps you can take that catalog and beat them into a better 
price schedule with it?

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)


Absence makes the heart go wander.

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Re: [Emc-users] Router Cutter v Milling Cutter

[Stuart Stevenson]

http://woodworker.com/140-straight-bit-fleigh-mssu-921-327.asp?search=14%20Router%20Bit&searchmode=2

nothing like this over there?

-- 
dos centavos
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Re: [Emc-users] Router Cutter v Milling Cutter

[andy pugh]

On 28 April 2011 15:28, gene heskett  wrote:

> :( I keep forgetting which side of the pond you are on, but is there not a
> similar retailer catering to the construction trades there?

Not at the prices you suggest:
http://www.cromwell.co.uk/static/publication/990/pages/141.pdf

-- 
atp
"Torque wrenches are for the obedience of fools and the guidance of wise men"

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Re: [Emc-users] Router Cutter v Milling Cutter

[Jack Coats]

I have talked to someone that does cut MDF all day long.  He uses
diamond impregnated bits.  Yes they cost more, but more than make up
for the cost in longevity.

for the 68-005 the Onsrud description is:

PCD Tipped Straight Flute Cutter
Designed for use in abrasive materials where cut quality and tool life
are important. Composite panels and fiberglass HELIX ANGLE = 0-3°

I found them online at

http://www.carbidespecialties.com/Onsrud_PCD_Bits.htm

onsrud.com lists the 68-005 at about US$285 plus S&H ... other places
may have it cheaper.

Check the onsrud web site, they have dealers world wide.

I am sure there are other manufacturers elsewhere.

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Re: [Emc-users] Router Cutter v Milling Cutter

[gene heskett]

On Thursday, April 28, 2011 10:26:42 AM andy pugh did opine:

> On 28 April 2011 15:08, gene heskett  wrote:
> > but you can put one of those in hand in an hour or less depending on
> > how close the nearest Lowes is.
> 
> About 3000 miles

:( I keep forgetting which side of the pond you are on, but is there not a 
similar retailer catering to the construction trades there?

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)


Absence makes the heart forget.

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Re: [Emc-users] Router Cutter v Milling Cutter

[andy pugh]

On 28 April 2011 15:08, gene heskett  wrote:

> but you can put one of those in hand in an hour or less depending on
> how close the nearest Lowes is.

About 3000 miles

-- 
atp
"Torque wrenches are for the obedience of fools and the guidance of wise men"

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Re: [Emc-users] Router Cutter v Milling Cutter

[gene heskett]

On Thursday, April 28, 2011 09:54:59 AM andy pugh did opine:

> I hope to machine some MDF on my milling machine this evening. I need
> to by a longer tool, and have the choice of a suitable brazed carbide
> router cutter or a HSS milling
> cutter from different shops at the same price.
> 
> Which would work best at the inadequate speed that my milling head can
> manage? Suggested spindle speed for both is rather higher than my
> machine capability.
> 
> (I am tending towards the milling cutter, as it will also work for
> other materials)

Lowes usually has a Bosch 1/4" 2 flute upcut spiral router bit in solid 
carbide that I have used several of up, and in MDF, nothing but solid 
carbide will hold an edge for long.  This bit has a 1 inch and small change 
flute length, so can be run full depth in 3/4" MDF in one pass.  And it can 
do a straight plunge too.  Unforch, at the rpms either of our machines can 
make, MDF cuts with a lot of fuzz left at the edges.  The brazed bit, not 
being as sharp, exacerbates this, a lot. :(  The HSS bit will rapidly dull 
in MDF even if originally very sharp.

It runs slightly more than a $20 bill IIRC.  There are no doubt better 
bits, but you can put one of those in hand in an hour or less depending on 
how close the nearest Lowes is.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)


Where's SANDY DUNCAN?

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Re: [Emc-users] EMC2 controlling phase driver

[gene heskett]

On Thursday, April 28, 2011 09:15:11 AM Mark Thomas did opine:

> Yes, it's driving convemtional steppers, doubt that it's better but it's
> better than scrapping a working box. I have been driving it with
> TurboCNC but the old laptop I was using died taking the disk and all my
> setup info with it. All my other machines are conventional
> step/direction and I have been using EMC2 for a few years with them so
> simply want to bring the old box back up with EMC2 instead of reverting
> back to TurboCNC (although it is a good basic program in its own
> right).
> 
> The driver itself is the one that originally came as standard with Taig
> mills before they switched to step/direction ones. There is a
> conversion board available to allow step/direction input, but I don't
> see the point as I believe EMC2 will handle the phase style once set up
> properly.

That conversion board, unless it can do micro stepping, is a step sideways, 
only cutting the port pin usage in half.

> Cheers,
> 
> Mark

I have been told that it can, but driving it with the 4 line mode will run 
it in what is basically the full step mode.  By using step/dir, you cut the 
pin usage on the port in half, and a smarter driver can then micro-step the 
motor.  This has a number of advantages in that resonance effects at 
certain speeds are smoothed over, with the result in most cases being a 
quite noticeable increase in the actual, usable for everyday work, speed of 
movements.  Throw in that micro-stepping also seriously reduces the motor 
noise and I would never go back to full step.

When I was just getting started, and had bought my first 3 axis xylotex 
kit, I did some experimenting, and found that I was having motor stall 
lockups using full step, at speeds in the 6 or 7 ipm range.  Switching to 
1/4 step got me up to 12 or 13 ipm, and the 1/8 step mode would work fairly 
reliably at 15 ipm.  Then I made some dampers for the motors, and that got 
my X/Y above 25 ipm.

Currently, with my home made Z axis drive using a 10 tpi screw and a 425 
ounce motor geared down 17/42, that axis, with gib drag free can do 35 ipm 
both directions.  The head is countersprung.

The rest of my X/Y screws are 20 tpi oem acme's, direct drive with 262 oz 
motors.

> On Thu, 28 Apr 2011 09:06:45 +0100
> 
> "Ian W. Wright"  wrote:
> > Lawrence,
> > 
> > Is this driving conventional steppers or something
> > different. Is it a better system than microstepping?
> > 
> > Ian

Motor performance issues would make me say no, microstepping is better, 
much better.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
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Re: [Emc-users] Router Cutter v Milling Cutter

[Edward Bernard]

I've found carbide spiral cutters to be the best solution though they're more 
expensive than the brazed variety.






From: John Thornton 
To: Enhanced Machine Controller (EMC) 
Sent: Thu, April 28, 2011 7:53:59 AM
Subject: Re: [Emc-users] Router Cutter v Milling Cutter

All the wood guys here in the forest use carbide tipped blades or change 
them often...

John

Stuart Stevenson wrote:
> agreed
>
> On Thu, Apr 28, 2011 at 7:39 AM, Les Newellwrote:
>
>
>> Hi Andy,
>>
>> Don't use HSS on MDF. MDF is very abrasive and destroys HSS cutters very
>> quickly. Even carbide wears pretty fast.
>>
>> Les
>>
>> On 28/04/2011 13:11, andy pugh wrote:
>>  
>>> I hope to machine some MDF on my milling machine this evening. I need
>>> to by a longer tool, and have the choice of a suitable brazed carbide
>>> router cutter or a HSS milling
>>> cutter from different shops at the same price.
>>>
>>> Which would work best at the inadequate speed that my milling head can
>>> manage? Suggested spindle speed for both is rather higher than my
>>> machine capability.
>>>
>>> (I am tending towards the milling cutter, as it will also work for
>>> other materials)
>>>
>>>
>>
>>
>> 
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>
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Re: [Emc-users] Router Cutter v Milling Cutter

[John Thornton]

All the wood guys here in the forest use carbide tipped blades or change 
them often...

John

Stuart Stevenson wrote:
> agreed
>
> On Thu, Apr 28, 2011 at 7:39 AM, Les Newellwrote:
>
>
>> Hi Andy,
>>
>> Don't use HSS on MDF. MDF is very abrasive and destroys HSS cutters very
>> quickly. Even carbide wears pretty fast.
>>
>> Les
>>
>> On 28/04/2011 13:11, andy pugh wrote:
>>  
>>> I hope to machine some MDF on my milling machine this evening. I need
>>> to by a longer tool, and have the choice of a suitable brazed carbide
>>> router cutter or a HSS milling
>>> cutter from different shops at the same price.
>>>
>>> Which would work best at the inadequate speed that my milling head can
>>> manage? Suggested spindle speed for both is rather higher than my
>>> machine capability.
>>>
>>> (I am tending towards the milling cutter, as it will also work for
>>> other materials)
>>>
>>>
>>
>>
>> --
>> WhatsUp Gold - Download Free Network Management Software
>> The most intuitive, comprehensive, and cost-effective network
>> management toolset available today.  Delivers lowest initial
>> acquisition cost and overall TCO of any competing solution.
>> http://p.sf.net/sfu/whatsupgold-sd
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>>  
>
>
>

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Re: [Emc-users] Router Cutter v Milling Cutter

[Stuart Stevenson]

agreed

On Thu, Apr 28, 2011 at 7:39 AM, Les Newell wrote:

> Hi Andy,
>
> Don't use HSS on MDF. MDF is very abrasive and destroys HSS cutters very
> quickly. Even carbide wears pretty fast.
>
> Les
>
> On 28/04/2011 13:11, andy pugh wrote:
> > I hope to machine some MDF on my milling machine this evening. I need
> > to by a longer tool, and have the choice of a suitable brazed carbide
> > router cutter or a HSS milling
> > cutter from different shops at the same price.
> >
> > Which would work best at the inadequate speed that my milling head can
> > manage? Suggested spindle speed for both is rather higher than my
> > machine capability.
> >
> > (I am tending towards the milling cutter, as it will also work for
> > other materials)
> >
>
>
>
> --
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> management toolset available today.  Delivers lowest initial
> acquisition cost and overall TCO of any competing solution.
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Re: [Emc-users] Router Cutter v Milling Cutter

[Les Newell]

Hi Andy,

Don't use HSS on MDF. MDF is very abrasive and destroys HSS cutters very 
quickly. Even carbide wears pretty fast.

Les

On 28/04/2011 13:11, andy pugh wrote:
> I hope to machine some MDF on my milling machine this evening. I need
> to by a longer tool, and have the choice of a suitable brazed carbide
> router cutter or a HSS milling
> cutter from different shops at the same price.
>
> Which would work best at the inadequate speed that my milling head can
> manage? Suggested spindle speed for both is rather higher than my
> machine capability.
>
> (I am tending towards the milling cutter, as it will also work for
> other materials)
>


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[Emc-users] Router Cutter v Milling Cutter

[andy pugh]

I hope to machine some MDF on my milling machine this evening. I need
to by a longer tool, and have the choice of a suitable brazed carbide
router cutter or a HSS milling
cutter from different shops at the same price.

Which would work best at the inadequate speed that my milling head can
manage? Suggested spindle speed for both is rather higher than my
machine capability.

(I am tending towards the milling cutter, as it will also work for
other materials)

-- 
atp
"Torque wrenches are for the obedience of fools and the guidance of wise men"

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Re: [Emc-users] EMC2 controlling phase driver

[Mark Thomas]

Thanks Lawrence,

I know that it has been operating in half-step mode. I've asked the 
manufacturer to send me a spec sheet to see if I can get to the bottom of which 
type to use. I seem to remember (it was more than ten years ago) that there 
were four phases per motor when in half-step mode.

Cheers,

Mark
On Wed, 27 Apr 2011 18:59:58 -0700
Lawrence Glaister  wrote:

> Hi Mark,
> I am not sure what you are referring to by the term phase drive.
> I use my mill and lathe with stepgen set to stepping type 2 which is
> quadrature drive ( drive waveform is identical to a quadrature encoder )
> Sometimes this mode and some of the higher stepping type modes get
> referred to as phase drive. 
> If you need sample configs for lathe and or mill with quadrature drive,
> drop me an email and I will send them along. There are very few changes
> required to the sample stepper files... changing the stepping type, and
> renamimg the connections from step/dir to something like phaseA/phaseB.
> cheers
> Lawrence
> 
> On Thu, 2011-04-28 at 09:33 +0900, Mark Thomas wrote:
> > A quick question. I have EMC2 controlling 3 different machines through 
> > step/direction drivers I also have an older phase driver which is connected 
> > to a small lathe using TurboCNC  I believe I have read that EMC2 will 
> > indeed work with phase drives but am having a hard time finding info. Any 
> > ideas on where to start?
> > 
> 
> -- 
> 
> =
> Lawrence Glaister VE7IT  mailto:ve...@shaw.ca
> 1462 Madrona Drive   
> Nanoose Bay, B.C.http://members.shaw.ca/swstuff 
> Canada  V9P 9C9  http://gspy.sourceforge.net
> =
> 
> 
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Re: [Emc-users] EMC2 controlling phase driver

[andy pugh]

On 28 April 2011 01:33, Mark Thomas  wrote:
>  I believe I have read that EMC2 will indeed work with phase drives but am 
> having a hard time finding info. Any ideas on where to start?

Nice diagrams here:
http://www.linuxcnc.org/docview/html/hal_rtcomps.html#sec:Stepgen

-- 
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Re: [Emc-users] EMC2 controlling phase driver

[Mark Thomas]

Yes, it's driving convemtional steppers, doubt that it's better but it's better 
than scrapping a working box. I have been driving it with TurboCNC but the old 
laptop I was using died taking the disk and all my setup info with it. All my 
other machines are conventional step/direction and I have been using EMC2 for a 
few years with them so simply want to bring the old box back up with EMC2 
instead of reverting back to TurboCNC (although it is a good basic program in 
its own right).

The driver itself is the one that originally came as standard with Taig mills 
before they switched to step/direction ones. There is a conversion board 
available to allow step/direction input, but I don't see the point as I believe 
EMC2 will handle the phase style once set up properly.

Cheers,

Mark
On Thu, 28 Apr 2011 09:06:45 +0100
"Ian W. Wright"  wrote:

> Lawrence,
> 
> Is this driving conventional steppers or something 
> different. Is it a better system than microstepping?
> 
> Ian
> 
> On 28/04/2011 02:59, Lawrence Glaister wrote:
> > Hi Mark,
> > I am not sure what you are referring to by the term phase drive.
> > I use my mill and lathe with stepgen set to stepping type 2 which is
> > quadrature drive ( drive waveform is identical to a quadrature encoder )
> > Sometimes this mode and some of the higher stepping type modes get
> > referred to as phase drive.
> > If you need sample configs for lathe and or mill with quadrature drive,
> > drop me an email and I will send them along. There are very few changes
> > required to the sample stepper files... changing the stepping type, and
> > renamimg the connections from step/dir to something like phaseA/phaseB.
> > cheers
> > Lawrence
> >
> > On Thu, 2011-04-28 at 09:33 +0900, Mark Thomas wrote:
> >> A quick question. I have EMC2 controlling 3 different machines through 
> >> step/direction drivers I also have an older phase driver which is 
> >> connected to a small lathe using TurboCNC  I believe I have read that EMC2 
> >> will indeed work with phase drives but am having a hard time finding info. 
> >> Any ideas on where to start?
> >>
> 
> 
> --
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Re: [Emc-users] EMC2 controlling phase driver

[Mark Thomas]

Definately a good place to start!
Cheers,

Mark
On Wed, 27 Apr 2011 18:09:12 -0700 (PDT)
"Peter C. Wallace"  wrote:

> On Thu, 28 Apr 2011, Mark Thomas wrote:
> 
> > Date: Thu, 28 Apr 2011 09:33:07 +0900
> > From: Mark Thomas 
> > Reply-To: "Enhanced Machine Controller (EMC)"
> > 
> > To: emc-users@lists.sourceforge.net
> > Subject: [Emc-users] EMC2 controlling phase driver
> > 
> > A quick question. I have EMC2 controlling 3 different machines through 
> > step/direction drivers I also have an older phase driver which is connected 
> > to a small lathe using TurboCNC I believe I have read that EMC2 will indeed 
> > work with phase drives but am having a hard time finding info. Any ideas on 
> > where to start?
> 
> man stepgen?
> 
> 
> 
> Peter Wallace
> Mesa Electronics
> 
> (\__/)
> (='.'=) This is Bunny. Copy and paste bunny into your
> (")_(") signature to help him gain world domination.
> 
> 
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[Emc-users] EMC2 controlling phase driver

[Roland Jollivet]

I think the OP wants to drive stepper motors using four digital lines for
one stepper motor;
A, B, C, D phases, much like one would directly drive a LM298.

Regards
Roland


On 28 April 2011 10:06, Ian W. Wright  wrote:

> Lawrence,
>
> Is this driving conventional steppers or something
> different. Is it a better system than microstepping?
>
> Ian
>
> On 28/04/2011 02:59, Lawrence Glaister wrote:
> > Hi Mark,
> > I am not sure what you are referring to by the term phase drive.
> > I use my mill and lathe with stepgen set to stepping type 2 which is
> > quadrature drive ( drive waveform is identical to a quadrature encoder )
> > Sometimes this mode and some of the higher stepping type modes get
> > referred to as phase drive.
> > If you need sample configs for lathe and or mill with quadrature drive,
> > drop me an email and I will send them along. There are very few changes
> > required to the sample stepper files... changing the stepping type, and
> > renamimg the connections from step/dir to something like phaseA/phaseB.
> > cheers
> > Lawrence
> >
> > On Thu, 2011-04-28 at 09:33 +0900, Mark Thomas wrote:
> >> A quick question. I have EMC2 controlling 3 different machines through
> step/direction drivers I also have an older phase driver which is connected
> to a small lathe using TurboCNC  I believe I have read that EMC2 will indeed
> work with phase drives but am having a hard time finding info. Any ideas on
> where to start?
> >>
>
>
>
> --
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Re: [Emc-users] EMC2 controlling phase driver

[Ian W. Wright]

Lawrence,

Is this driving conventional steppers or something 
different. Is it a better system than microstepping?

Ian

On 28/04/2011 02:59, Lawrence Glaister wrote:
> Hi Mark,
> I am not sure what you are referring to by the term phase drive.
> I use my mill and lathe with stepgen set to stepping type 2 which is
> quadrature drive ( drive waveform is identical to a quadrature encoder )
> Sometimes this mode and some of the higher stepping type modes get
> referred to as phase drive.
> If you need sample configs for lathe and or mill with quadrature drive,
> drop me an email and I will send them along. There are very few changes
> required to the sample stepper files... changing the stepping type, and
> renamimg the connections from step/dir to something like phaseA/phaseB.
> cheers
> Lawrence
>
> On Thu, 2011-04-28 at 09:33 +0900, Mark Thomas wrote:
>> A quick question. I have EMC2 controlling 3 different machines through 
>> step/direction drivers I also have an older phase driver which is connected 
>> to a small lathe using TurboCNC  I believe I have read that EMC2 will indeed 
>> work with phase drives but am having a hard time finding info. Any ideas on 
>> where to start?
>>


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Re: [Emc-users] M-code into Classic Ladder

[Kim Kirwan]

Yes, I have done this. Try:
script --> hal command --> CL input
Sometimes in combination with:
PyVCP input --> CL input
And you might need the handy script-wait-for here:
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?CustomMcodesToHal

Kim


On 04/27/2011 01:51 PM, David Winter wrote:
> Dear All,
> Is it possible for a programmed M-code to affect a 
> facility in Classic Ladder, e.g
> move a value into a register or set a flag or marker?
> 
> Thanks in advance,
> 
> David Winter.
> 
> 
> 
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