I know, it's the easiest. Unfortunately, it's kinda hard to tilt a workshop
floor. With that said, I need a tilting head...
2011/4/4 Dave Caroline dave.thearchiv...@gmail.com
You can equally tilt the table to get the same/similar machining
envelope. It depends on what you are going to make and
On 6 April 2011 11:15, John Thornton bjt...@gmail.com wrote:
1/4 thick usually and yes 90 degrees
It shouldn't come as any real surprise that a plastic is plastic
--
atp
Torque wrenches are for the obedience of fools and the guidance of wise men
On Tue, Apr 05, 2011 at 11:14:47AM -0400, Tom Easterday wrote:
On Apr 5, 2011, at 8:45 AM, Stephen Wille Padnos wrote:
Note that with grub2, ie Ubuntu 10.04, there is a directory of files
which are executed in order whenever grub is reconfigured. It looks
like the output of those files
On 4/6/2011 7:28 AM, Erik Christiansen wrote:
...
That would rely on the fact that we do not output to stdout, so that if
grub-mkconfig ends without spontaneous output, there is nothing to write
to disk when grub-mkconfig closes its filedescriptor _after_ all the
helper scripts, including
I have 400V servo drives, 350V motors and 240V single-phase mains power.
Is there any reason that my servo power supplies need to be anything
more than a rectifier and caps? I will probably add a PTC and an input
fuse too.
Would a relay/resistor to discharge the caps on power-off be usual?
--
normally people discharge caps through a resistor only.
On Wed, Apr 6, 2011 at 8:18 AM, andy pugh bodge...@gmail.com wrote:
I have 400V servo drives, 350V motors and 240V single-phase mains power.
Is there any reason that my servo power supplies need to be anything
more than a rectifier and
On Wed, 6 Apr 2011, andy pugh wrote:
Date: Wed, 6 Apr 2011 14:18:18 +0100
From: andy pugh bodge...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: [Emc-users] PSU
I
On 6 April 2011 14:31, Igor Chudov ichu...@gmail.com wrote:
normally people discharge caps through a resistor only.
In that case, what would be the normal discharge time? Last time I did
the calculations it looked like a permanently-connected resistor
needed to be rated at several tens of watts
On Wed, Apr 06, 2011 at 08:46:21AM -0400, Ed Nisley wrote:
On Wed, 2011-04-06 at 21:28 +1000, Erik Christiansen wrote:
Perhaps b) is the way to go?
At the risk of appearing an ungrateful wretch, it seems the problem has
been transformed from:
- remember to edit /boot/grub/grub.cfg after
On Wed, Apr 6, 2011 at 8:51 AM, andy pugh bodge...@gmail.com wrote:
On 6 April 2011 14:31, Igor Chudov ichu...@gmail.com wrote:
normally people discharge caps through a resistor only.
In that case, what would be the normal discharge time? Last time I did
the calculations it looked like a
On Apr 6, 2011, at 8:46 AM, Ed Nisley wrote:
While script twiddling may be a cleaner solution, the whole apparat can
cause even more mysterious failures than my usual Whoops, forgot to
edit grub.cfg again! error. Any system update that clobbers those files
or the assumptions going into them
On Wed, Apr 06, 2011 at 02:51:02PM +0100, andy pugh wrote:
On 6 April 2011 14:31, Igor Chudov ichu...@gmail.com wrote:
normally people discharge caps through a resistor only.
In that case, what would be the normal discharge time? Last time I did
the calculations it looked like a
I'm working with a company right now that is assembling a very large 5
axis machine.The too head pivots in two axes and and it is mounted
on a gantry slide to create the 5 axes. The final drive at the head is
via wide toothed belts - HTD type of similar.
The head is a yoke type design -
On 4/6/2011 9:18 AM, andy pugh wrote:
I have 400V servo drives, 350V motors and 240V single-phase mains power.
Is there any reason that my servo power supplies need to be anything
more than a rectifier and caps? I will probably add a PTC and an input
fuse too.
Would a relay/resistor to
It does make logical sense but all of the websites ( I found ) say that
heat is required to bend polycarbonate.
Perhaps they are confusing Lexan with Plexiglass...
I like the just throw it in the bender idea myself! :-)
Much simpler.
Thanks,
Dave
On 4/6/2011 6:45 AM, andy pugh wrote:
On 6
Why is it an error for a concave arc's radius to be equal to the tool
radius when using tool comp? Admittedly it will result in a zero length
move but in that case the move can be simply ignored, just like a zero
length linear move is ignored.
Les
On 04/06/2011 10:36 AM, Dave wrote:
It does make logical sense but all of the websites ( I found ) say that
heat is required to bend polycarbonate.
Perhaps they are confusing Lexan with Plexiglass...
I like the just throw it in the bender idea myself! :-)
Much simpler.
Thanks,
Dave
Plexiglas does shatter... I have first hand experience with that.
I thought thermoforming was required of Lexan also, otherwise I would
have bending Lexan years ago! :-)
That is a huge advantage.
Dave
On 4/6/2011 10:48 AM, Mark Wendt wrote:
On 04/06/2011 10:36 AM, Dave wrote:
It
On Wed, Apr 06, 2011 at 09:00:15AM -0400, Kent A. Reed wrote:
...
That would rely on the fact that we do not output to stdout, so that if
grub-mkconfig ends without spontaneous output, there is nothing to write
to disk when grub-mkconfig closes its filedescriptor _after_ all the
helper
I did an experiment. I took a 1/4 thick piece of junk Lexan, and beat it
with a steel bar. The Lexan piece would not shatter. It is supposed to be
bendable cold, but I do not have the facilities to do this.
I bend mine with a gas torch. I learned how to be careful with the torch, to
avoid most
On 04/06/2011 07:32 AM, Dave wrote:
On 4/6/2011 9:18 AM, andy pugh wrote:
I have 400V servo drives, 350V motors and 240V single-phase mains power.
Is there any reason that my servo power supplies need to be anything
more than a rectifier and caps? I will probably add a PTC and an input
fuse
On Wednesday, April 06, 2011 12:40:39 PM Ed Nisley did opine:
On Wed, 2011-04-06 at 21:28 +1000, Erik Christiansen wrote:
Perhaps b) is the way to go?
At the risk of appearing an ungrateful wretch, it seems the problem has
been transformed from:
- remember to edit /boot/grub/grub.cfg
On Wednesday, April 06, 2011 01:04:20 PM Kent A. Reed did opine:
On 4/6/2011 7:28 AM, Erik Christiansen wrote:
...
That would rely on the fact that we do not output to stdout, so that
if grub-mkconfig ends without spontaneous output, there is nothing to
write to disk when grub-mkconfig
On Wed, 6 Apr 2011, Rafael Skodlar wrote:
Date: Wed, 06 Apr 2011 09:45:45 -0700
From: Rafael Skodlar ra...@linwin.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] PSU
On 04/06/2011 07:32 AM,
On Wednesday, April 06, 2011 01:07:23 PM andy pugh did opine:
I have 400V servo drives, 350V motors and 240V single-phase mains power.
Is there any reason that my servo power supplies need to be anything
more than a rectifier and caps? I will probably add a PTC and an input
fuse too.
Here is a really cheap $100 7 touch screen that runs off Windows via a
USB interface.. unfortunately there are no Linux drivers, yet.
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=6321954CatId=1449
Dave
On 4/4/2011 10:09 AM, Dave wrote:
I just did a search on
On 4/6/2011 1:18 PM, Peter C. Wallace wrote:
The relay/resistor combination can do this much faster that a
reasonably bleeder, say .5 seconds or so. This makes the power supply safer
and provides braking of all servo axis in a fault condition.
That's what I was thinking. And since the
On Wednesday, April 06, 2011 02:06:35 PM Dave did opine:
Here is a really cheap $100 7 touch screen that runs off Windows via a
USB interface.. unfortunately there are no Linux drivers, yet.
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?Edp
No=6321954CatId=1449
On 4/6/2011 2:08 PM, gene heskett wrote:
On Wednesday, April 06, 2011 02:06:35 PM Dave did opine:
Here is a really cheap $100 7 touch screen that runs off Windows via a
USB interface.. unfortunately there are no Linux drivers, yet.
On Wed, 6 Apr 2011, andy pugh wrote:
Date: Wed, 6 Apr 2011 20:49:16 +0100
From: andy pugh bodge...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] PSU
Compare and contrast:
http://cgi.ebay.co.uk/RIFA-EVOX-CAPACITOR-PEH200-3300UF-NEW-/180648591924
and
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProductR=3111254
== eBay Bargain.
Whereas:
http://cgi.ebay.co.uk/NEW-Epcos-Electrolytic-Capacitor-2200uF-B43564A5228M000
and
Just a data point, I used a 10,000 uF capacitor for my 72v, 25A power
supply.
Seems to work great.
i
On Wed, Apr 6, 2011 at 2:49 PM, andy pugh bodge...@gmail.com wrote:
And now the cap sizing.
If I say that I can put up with 10% ripple at max rated current (7.5A
for the motors) on a nominal
On 6 April 2011 20:59, andy pugh bodge...@gmail.com wrote:
http://cgi.ebay.co.uk/NEW-Epcos-Electrolytic-Capacitor-2200uF-B43564A5228M000
http://cgi.ebay.co.uk/NEW-Epcos-Electrolytic-Capacitor-2200uF-B43564A5228M000-/290534781332
(if anyone cares). Basically 3x the price from eBay as from the
On 6 April 2011 20:57, Igor Chudov ichu...@gmail.com wrote:
Just a data point, I used a 10,000 uF capacitor for my 72v, 25A power
supply.
10,000uF @ 100V is £20
10,000uF @ 400V is £135
Perhaps a transformer would be more cost-effective :-)
--
atp
Torque wrenches are for the obedience of
On Wednesday, April 06, 2011 04:02:33 PM andy pugh did opine:
And now the cap sizing.
If I say that I can put up with 10% ripple at max rated current (7.5A
for the motors) on a nominal 300V then I end up with
C = 7.5A X 10mS / 30V = 2500uF.
Eeek!
Understatement Andy, it will weld relays
And now the cap sizing.
If I say that I can put up with 10% ripple at max rated current (7.5A
for the motors) on a nominal 300V then I end up with
C = 7.5A X 10mS / 30V = 2500uF.
Eeek!
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProductR=5436785
Is the cheapest that is
On Wed, 6 Apr 2011, andy pugh wrote:
Date: Wed, 6 Apr 2011 21:07:53 +0100
From: andy pugh bodge...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] PSU
On 6
On Wed, Apr 6, 2011 at 3:14 PM, gene heskett ghesk...@wdtv.com wrote:
On Wednesday, April 06, 2011 04:02:33 PM andy pugh did opine:
And now the cap sizing.
If I say that I can put up with 10% ripple at max rated current (7.5A
for the motors) on a nominal 300V then I end up with
C = 7.5A
On 6 April 2011 21:14, gene heskett ghesk...@wdtv.com wrote:
Understatement Andy, it will weld relays closed with the inrush unless
surge limited.
I have plenty of NTC surge limiters.
And for 60hz power, your 10ms would be 8.333 for a
full wave bridge.
Yes, but I have proper,
On Wednesday, April 06, 2011 04:25:58 PM Igor Chudov did opine:
On Wed, Apr 6, 2011 at 3:14 PM, gene heskett ghesk...@wdtv.com wrote:
On Wednesday, April 06, 2011 04:02:33 PM andy pugh did opine:
And now the cap sizing.
If I say that I can put up with 10% ripple at max rated current
On Wednesday, April 06, 2011 04:28:52 PM andy pugh did opine:
On 6 April 2011 21:14, gene heskett ghesk...@wdtv.com wrote:
Understatement Andy, it will weld relays closed with the inrush unless
surge limited.
I have plenty of NTC surge limiters.
�And for 60hz power, your 10ms would be
On Wed, Apr 6, 2011 at 1:52 PM, Dave e...@dc9.tzo.com wrote:
On 4/6/2011 2:08 PM, gene heskett wrote:
On Wednesday, April 06, 2011 02:06:35 PM Dave did opine:
Here is a really cheap $100 7 touch screen that runs off Windows via a
USB interface.. unfortunately there are no Linux
it will undercut the material or the adjoining moves have to be shortened
Dave Caroline
On Wed, Apr 6, 2011 at 3:40 PM, Les Newell les.new...@fastmail.co.uk wrote:
Why is it an error for a concave arc's radius to be equal to the tool
radius when using tool comp? Admittedly it will result in a
Not if they are the same. The offset arc will have exactly zero length
so there wil not be any undercut.
Les
On 06/04/11 22:23, Dave Caroline wrote:
it will undercut the material or the adjoining moves have to be shortened
Dave Caroline
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