Re: [Emc-users] Solution, litterally, to one problem.

[Peter Loron]

Amazon carries a variety of fine grit wet/dry sandpaper if you cannot source it 
locally.

-Pete

> On Dec 11, 2015, at 09:13, Gene Heskett  wrote:
> 
> On Friday 11 December 2015 10:15:52 Mark wrote:
> 
>> On 12/11/2015 09:57 AM, Gene Heskett wrote:
 With the work I do on cane rodmaking, 320 grit is still pretty damn
 coarse.  ;-)  Maybe they'll eventually come out with a 600 grit.  I
 work down to 2000 grit on the finish, but there I can use wet/dry
 paper.  But 600 grit is a good final cut before the finish goes on.
 
 Mark
 
 Mark
>>> 
>>> Out of curiosity, where do you source anything finer than 600 in
>>> wet-r-dry? I'm stuck at  steel wool for a gloss breaker when
>>> re-coating finish.
>>> 
>>> I stopped at the WoodCraft store, near Parkersburg WV, a couple
>>> times but their stock stopped at 320, which both surprised and
>>> disappointed me. So the only thing I came away with was a Kuhn
>>> scraper plane, which turned out to have a sheet of cold roll for a 
>>> blade, edge gone in one stroke on straight grained maple. I thought
>>> it would make a great final flattener but haven't stumbled over a
>>> good blade for it.  Its sole wasn't flat either, took an hours work
>>> on a sheet of 600 stuck to my surface plate to get it 50% flat, so
>>> it still isn't truly flat.  I gave up, its still in the box. I pull
>>> it off the shelf occasionally to see if its improved with age &
>>> burnish up an edge, using the shank of a broken 1/4" solid carbide
>>> mill I superglued into an 8" x 3/4" dowel for a handle. Dulls so
>>> fast it just slides over the bumps in 2 strokes.  Most useless $90 I
>>> ever spent.
>>> 
>>> Cheers, Gene Heskett
>> 
>> Gene,
>> 
>> When I was still living in Maryland, I sourced most all my finishing
>> products (with the exception of the finish - true marine spar varnish)
>> at the local auto body supply shop.  Sand paper, rubbing compound,
>> polishes, finish strainers, etc.  The big box stores and hardware
>> stores just don't stock that kind of stuff.  The really fine grit sand
>> paper is necessary for auto finishes these days, as is all the other
>> stuff I mentioned.
>> 
>> Mark
>> 
> And locally, we have not such a critter as a body shop supplier.  NAPA 
> plays at the game, but poorly, everything is special order.
> 
> I should check with Charley Denison, who did the rust restoration of my 
> WV Caddy (a 99 GMC 3 door short box pickup) a year ago.  Charleston 
> perhaps, or Pittsburgh for sure. But if Charley has some, I'll let him 
> make a dollar or 2 off me just because I can drive over and bring it 
> home, about 20 miles over hill & dale & around the mountain(s) from 
> here.
> 
> Cheers, Gene Heskett
> -- 
> "There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> Some mill pix are at:
> Genes Web page  >
> 
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Re: [Emc-users] OT - liquid pump for really cold temperature

[Peter Loron]

We just had a cheap add-on mains-powered block heater (inline with the cooling 
system, as I recall) in our gas cars when we lived in upstate New York. -20C 
was common in the winter.

-Pete

On Jan 20, 2013, at 4:09 PM, Sven Wesley svenne.d...@gmail.com wrote:

 2013/1/20 andy pugh bodge...@gmail.com
 
 Nearly any modern car will have provision somewhere on the engine for
 a block heater. It is also likely to be in the right place too. Have
 you looked for a manufacturer-original part?
 
 
 Nearly every engine ever built sinces the 60's, I would say. Even my Volvo
 Amazon had one, and they really were built during the 60's.
 
 Webastos have a pump if they're supposed to heat up the coupe too and not
 only the engine.
 My VW Touran has a Webasto without a pump, they have a burner as standard
 equipment because the TDI's doesn't come up in temp without it when it's
 cold outside and as an extra you can buy a timer or remote for preheating.
 My brother's Volvo XC60 has a Webasto with pump, while he gets a cozy seat
 I get a frost free wind shield at its best. On the other hand, the car is
 at working temp after one or two minutes of driving if the heater was on.
 
 Like Andy says, what's your car? There will be a heater.
 http://www.defa.com/en/automotive/warmup/find_your_engine_heater/
 
 /S
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Re: [Emc-users] cnc on windows

[Peter Loron]

Why on earth would you want to run it under Windows? It comes as a 
pre-configred distro, easy to install.

If you don't have a separate machine to run it on, then install it on another 
disk, or thumb drive, etc, and boot off of that when you want to run it.

-Pete


On Nov 23, 2012, at 11:48 AM, Roland Jollivet roland.jolli...@gmail.com wrote:

 Surely Linuxcnc can be compiled for windows?
 
 http://www.tenasys.com/index.php/applications/case-studies
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Re: [Emc-users] Crowdsourced mass CNC produced private weapons

[Peter Loron]

On Oct 14, 2012, at 9:03 PM, Igor Chudov ichu...@gmail.com wrote:

 The article is mostly balderdash, but it mentions making gun receivers with
 3D printers. This confused me somewhat, since I thought that 3D printers
 can only make plastic objects.

The 3d printers that are now cheaply available to hobbyists do print using 
plastic. However, there are high-end machines that print using metals. There 
are a number of processes.

Example:
http://production3dprinters.com/slm/direct-metal-slm

-Pete
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Re: [Emc-users] Hold-down straps

[Peter Loron]

Interesting! Thanks for the edification folks!

-Pete

On Oct 13, 2012, at 12:26 PM, Stuart Stevenson stus...@gmail.com wrote:

 A machine repairman in Wichita uses a planer to machine all the surfaces
 possible to eliminate/reduce machined surface stresses on repair parts. He
 claims there is a great difference between parts machined with end mills
 and single point cut on a planer.
 I have long wanted to cnc a planer and put a rotary table in place of the
 clapper block.
 On Oct 13, 2012 11:32 AM, Thomas J Powderly tomp4...@gmail.com wrote:
 
 On 10/13/2012 12:58 AM, Peter Loron wrote:
 I watched the linked video. Can somebody comment on why you would use a
 shaper for that work instead of a mill or surface grinder? I'm trying to
 understand the purpose of a shaper.
 
 Thanks.
 
 -Pete
 
 shaper produce almost no stress in the surface
 rotary machining ( mills lathes ) create a skin that warps under stress
 of heat, and unravels with time
 AGie machine castings ( sinkers, wedm's  edmgrinders)  were all shaped,
 then checked in a heat box for 24hrs
 ( dunno present day mcftr methods, but true in Losonne when i was there
 in 80's )
 these machines hold micron tolerances becuz every tiny detail was tested
 the machine tool has to be better than the machined work
 regards
 tomp
 
 
 
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Re: [Emc-users] home chemistry, was: General question about gibs

[Peter Loron]

A most excellent blog. His other posts are worth reading as well.

Go do a search for pentaborane. 

-Pete

On Aug 25, 2012, at 9:18 AM, Peter C. Wallace wrote:

 On Sat, 25 Aug 2012, dave wrote:
 
 SNIP
 
 Someplace out there ... is a website labeled something like, things I
 wouldn't try to make in the lab. Fascinating list of unstable compounds
 compiled from the literature.
 
 
 http://pipeline.corante.com/archives/things_i_wont_work_with/
 
 
 
 Peter Wallace
 Mesa Electronics
 
 
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Re: [Emc-users] Hey Gene! Hand held O'scope for ya.

[Peter Loron]

The Nano is a decent little scope. Very handy and can be easily dropped in your 
gear bag or used on your bench as an extra scope to supplement your bench unit. 

Far better than no scope, although I would recommend having something bigger if 
possible. I've also got one of the DS1052E scopes and it is pretty good for the 
money. It's also quite portable, compared to my old boatanchor scopes.

-Pete
 
On Aug 14, 2012, at 8:12 PM, Gene Heskett wrote:

 On Tuesday 14 August 2012 23:09:35 Jason Burton did opine:
 
 On Aug 14, 2012 9:08 AM, Gene Heskett ghesk...@wdtv.com wrote:
 On Tuesday 14 August 2012 10:00:30 Mark Wendt did opine:
 Ebay auction #160861790127
 
 Mark
 
 A bit rich ($330) for my budget.  I bought one of the DSO NANO's.  For
 
 what
 
 I want to use it for its adequate.  Unplug the usb charging cable and
 its fully isolated.
 
 Cheers, Gene
 --
 There are four boxes...
 
 How do you like the DSO Nano? I've been eyeing them for a while.
 
 About the only thing I haven't mastered is getting the sweep trigger set so 
 I can see the actual trigger.  Other than that, and a miss-match between 
 the probe and its frequency comp that distorts a square wave somewhat, it 
 Just Works(TM).
 
 I didn't expect it to match my Hitachi V-1065, but at 5% of the cost ...
 
 Cheers, Gene
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Re: [Emc-users] OT: KVMs

[Peter Loron]

Synergy is very handy if you have a monitor for each box.

-Pete

On Aug 1, 2011, at 7:20 PM, Kyle Kerr wrote:

 Have you given any thought or looks at a program called
 Synergy(http://synergy-foss.org/)?
 
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Re: [Emc-users] OT: KVMs

[Peter Loron]

Well, I've used a bunch of different KVM systems, and they all suck more or 
less. I've had far, far better luck using some sort of network-connected 
virtual desktop (Remote Desktiop, VNC, forwarded X, etc).

If you must go with KVM, I'd suggest keeping an eye out on epay/craigslist for 
used IP KVMs. Much less cabling to run around.

-Pete

On Aug 1, 2011, at 2:24 PM, Frank Tkalcevic wrote:

 I'm in the process of replacing one central computer with individual atom
 based computers inside each electrical cabinet for my router, lathe and soon
 mill.
 
 I'm wondering if anyone is using a KVM (Keyboard/Video/Mouse switch box),
 and what to look out for?
 What is better, long runs of DVI or VGA? (about 5 meters max).
 Is there any issue with electrical noise?
 
 I don't want to rely on a remote X connection to the box.
 
 Thanks,
 Frank
 
 
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Re: [Emc-users] EMC2 LiveCD torrent?

[Peter Loron]

Jack, were you able to grab the ISO ok?

-Pete


On 06/24/2011 12:29 PM, Jack Coats wrote:
 Thanks Peter.  It's found 2 peers and is downloading at between 3Kbps and
 15Kbps, so it will take a while.
 Thanks!

 ... Jack


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[Emc-users] ISO Torrent?

[Peter Loron]

Hello, group!

Question for all: Is there any interest in making the ISO available via 
torrent?

When I first went to get EMC2 a few weeks ago, I looked for a torrent. 
Finding none available, I went ahead and downloaded the ISO directly.

Recently I (and others) helped a list member get the ISO by setting up a 
torrent for him.

I would be willing to help seed a torrent for the ISO, and would also be 
willing to initiate the see if the folks who actually do the releases 
are not interested.

Discuss!

-Pete

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Re: [Emc-users] EMC2 LiveCD torrent?

[Peter Loron]

Ok, I'm up and seeding.

-Pete

On 06/24/2011 04:38 AM, Kim Kirwan wrote:
 Yes, that's better, I can get the torrent file now.
 But it's marked private, so I don't think I can help seed?
 I'm showing a count of zero seeds, zero peers.
 I don't even see me there.


 On 06/24/2011 06:28 AM, Kyle Kerr wrote:
 On Fri, Jun 24, 2011 at 7:21 AM, Kim Kirwank...@kimkirwan.com  wrote:
 Hi Kyle,

 I was able to join your earlier (attached) torrent as a seeder,
 but the magnet link is not looking good for me, anyone else?

 Downloading From
 :magnet:?xt=urn:btih:eebd5ddae35ed3f9a0438efd0afbea467f456af1...
 Searching...
 Found 0
 Trying secondary lookup service
 Secondary lookup failed: no sources found
 Error :  no sources found for torrent

 Kim
 http://linuxtracker.org/download.php?id=eebd5ddae35ed3f9a0438efd0afbea467f456af1f=ubuntu-10.04-linuxcnc1-i386.iso.torrent

 Better?


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Re: [Emc-users] EMC2 LiveCD torrent?

[Peter Loron]

On 06/23/2011 04:40 PM, Jack Coats wrote:
 I can't seem to find a torrent for downloading the EMC2 Live disk.

 Torrent is my preferred way, due to the bad network connection and torrent
 will 'survive' multiple outages.

 Thanks ... Jack

I was unable to find a torrent for it. I did the direct download which 
worked fine. Most tools for downloading have resume capability...

-Pete

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Re: [Emc-users] EMC2 LiveCD torrent?

[Peter Loron]

No worries, man. Lemme know when the torrent is up and I'll help seed it.

Re resume: I don't know what tools you're trying with, but I can't recall a 
situation where curl or wget failed me when doing autoresume...

-Pete

On Jun 23, 2011, at 5:54 PM, Jack Coats wrote:

 I have tried several times even with 'resume'.  But when the link breaks and
 gets a new external
 IP address, it doesn't come back even with resume.  If I was in 'civilized
 internet country' I know
 it works better to directly download.
 
 Right now we have about 20 machines sharing less than a megabit connection
 (max) that normally
 tops out at about 90 to 120 mbps (that is bits, not bytes).  So slow is the
 norm here, but for a few
 months a year it is uber-slow (I live on a girl scout camp, and we have 70
 additional staff from what
 are here during the rest of the year, all sharing the one connection.
 Normally we have 8 machines
 accessible, with no more than 2 or 3 in use, now with most of the staff
 being teenagers they plug
 the connection with facebook and youtube. ... just ending the 2nd week of
 summer camp.  Only 5 more
 weeks to go!) ... Where we are it is on a single shared wireless
 connection.  No cable or DSL, or
 Wimax are available here.  (10 miles away I could get WiMax, 3 miles in any
 direction I could get
 cable, 2 miles north or south we could get DSL.)   All this to say, I do
 what I can with what I have
 and try not to complain to much. ... I hope you don't consider this
 complaining, it isn't meant
 that way, just explaining my realities.
 
  ... Jack
 
 
 On Thu, Jun 23, 2011 at 7:42 PM, Jack Coats j...@coats.org wrote:
 
 Yep, thanks Kyle.  Whatever the latest version is.  I need to build a new
 machine, so going with
 the latest is probably best.
  ... Jack
 
 
 On Thu, Jun 23, 2011 at 7:02 PM, Kyle Kerr ker...@gmail.com wrote:
 
 On Thu, Jun 23, 2011 at 7:40 PM, Jack Coats j...@coats.org wrote:
 I can't seem to find a torrent for downloading the EMC2 Live disk.
 
 Torrent is my preferred way, due to the bad network connection and
 torrent
 will 'survive' multiple outages.
 
 Thanks ... Jack
 
 If you are patient and will tell me which version you are after. I
 will download it and then offer it as a torrent.
 
 
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Re: [Emc-users] How to re-enable updates

[Peter Loron]

Version control for the win. I'm a huge believer in git, but there are 
others that will work fine, especially for single user stuff.

You can also use something like Clonezilla to make an image of the 
existing drive, which can be restored if disaster strikes.

-Pete

On 06/21/2011 11:04 AM, Igor Chudov wrote:
 I highly recommend to keep all configs under source code control like CVS or
 subversion. Just a side note.

 I like your plan on what to back up. I think that you will be fine.

 If you feel extremely cautious, just buy yourself another hard drive and
 keep the old hard drive.

 i

 On Tue, Jun 21, 2011 at 12:56 PM, Karl Cunninghamka...@keckec.com  wrote:

 I am working on an emc2 2.4 system that was installed with Ubuntu 10.04,
 but a distribution upgrade to 10.10 was done by mistake about 6 months
 ago. Emc2 is working fine but updates are not since 10.10 isn't
 supported in the linuxcnc.org repository.

 I plan to reinstall. I'll do a complete backup of the file system first,
 and I can handle settings like host name, user names, passwords, etc. My
 plan is to restore the home directory from backup after reinstalling.

 Is there anything else that would need to be restored, assuming this is
 probably a pretty plain vanilla installation?

 My reasons for the reinstall are 1) To get updates to work again, 2) Any
 kernel updates will require setting grub to use the RT kernel, 3) In the
 future this machine may be administered by people with little Linux
 experience and I'd like updates to go as smoothly as possible.

 Thanks for any advice.

 Karl






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Re: [Emc-users] How to re-enable updates

[Peter Loron]

On 06/21/2011 02:35 PM, Jack Coats wrote:
 One thought, that others will undoubtedly shoot down,

 For your 'temporary backup' solution, install dropbox.
 Put the files you want in there.
 Re-install your machine, then put drop box on and get your
 configs back.

 Then if you want, un-install dropbox.

 Or use ubuntuone.

 Both have 2G for free.

 Don't consider this 'safe storage'.  I am sure it can be hacked, but
 it is convenient for non-'secure' data.

Dropbox is very handy. But, as Jack said, don't put anything sensitive 
on there. OR encrypt it first.

-Pete

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Re: [Emc-users] SuperPID with EMC?

[Peter Loron]

On 06/10/2011 04:21 PM, andy pugh wrote:
 On 10 June 2011 23:53, Jack Coatsj...@coats.org  wrote:
   They seem to support MACH3, but not apparently EMC2 (or at least not
 documented well).
 It has a PWM input, so EMC2 control would be trivial.

 However, it is rather expensive, and duplicates on-board a number of
 things that EMC2 would do for free. I have closed-loop PID control on
 my milling machine using built-in EMC2 functions and a PWM output from
 EMC2 to the motor drive.

 You should be able to use something like
 http://grizzly.amazonwebstore.com/Grizzly-G3555-Router-Speed-Control-20/M/BDD1R4.htm?traffic_src=GButm_medium=CSEutm_source=GBid=uk
 (Mainly as a cheap source of pre-assembled parts) with EMC2 PWM and a
 very simple interface circuit taking the place of the potentiometer.


I noted a very similar looking controller at Harbor Frieght for $19. Has 
anybody hacked on one of these to drive the pot from EMC?

Once I finish getting my mill basically operational, a router speed 
controller is next on my list. For now, of course, I could just rig up 
some sort of tach and twiddle the pot by hand to the the desired speed, 
but...

-Pete

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Re: [Emc-users] SuperPID with EMC?

[Peter Loron]

I've been looking at those routers. Glad to hear they're a good piece of kit.

I know nothing about how the internal speed control works on the router, but 
assuming you could simply feed a variable voltage or resistance in there, then 
what you suggest would work fine. You could do it cheaper if you roll 
everything yourself, but and Arduino makes it simple.

-Pete

On Jun 21, 2011, at 8:12 PM, Edward Bernard wrote:

 I have an Hitachi M12VC 
 http://www.google.com/products/catalog?q=HITACHI+ROUTERoe=utf-8rls=org.mozilla:en-US:officialclient=firefox-aum=1ie=UTF-8tbm=shopcid=4659105001687453144sa=Xei=_loBTsq9EIXl0QG9q5XQDgved=0CDwQ8gIwAA
 router I'm very pleased with. It's very quiet, light, and inexpensive  and 
 best 
 of all has a closed loop speed control that maintains torque  all through its 
 range. I have thought about replacing the potentiometer  with an interface to 
 EMC2 and would love to hear any ideas to accomplish  this. My first thought 
 was 
 to use an Arduino board to accept a PWM  signal and control a digital pot. 
 Any 
 better (simpler) ideas? 
 
 
 
 
 
 
 
 From: Kent A. Reed knbr...@erols.com
 To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
 Sent: Tue, June 21, 2011 8:01:11 PM
 Subject: Re: [Emc-users] SuperPID with EMC?
 
 On 6/21/2011 8:22 PM, Peter Loron wrote:
 On 06/10/2011 04:21 PM, andy pugh wrote:
 On 10 June 2011 23:53, Jack Coatsj...@coats.org   wrote:
   They seem to support MACH3, but not apparently EMC2 (or at least not
 documented well).
 It has a PWM input, so EMC2 control would be trivial.
 
 However, it is rather expensive, and duplicates on-board a number of
 things that EMC2 would do for free. I have closed-loop PID control on
 my milling machine using built-in EMC2 functions and a PWM output from
 EMC2 to the motor drive.
 
 You should be able to use something like
 http://grizzly.amazonwebstore.com/Grizzly-G3555-Router-Speed-Control-20/M/BDD1R4.htm?traffic_src=GButm_medium=CSEutm_source=GBid=uk
 k
 (Mainly as a cheap source of pre-assembled parts) with EMC2 PWM and a
 very simple interface circuit taking the place of the potentiometer.
 
 I noted a very similar looking controller at Harbor Frieght for $19. Has
 anybody hacked on one of these to drive the pot from EMC?
 
 Once I finish getting my mill basically operational, a router speed
 controller is next on my list. For now, of course, I could just rig up
 some sort of tach and twiddle the pot by hand to the the desired speed,
 but...
 
 -Pete
 Pete:
 
 I've purchased several similar controllers from different sources for 
 use with routers and the like. Some of the controllers worked very well; 
 some weren't worth the cardboard box they came in. Honestly, I couldn't 
 predict from their external form, fit, and finish which would be 
 acceptable. Certainly, their retail prices didn't correlate with their 
 performance. I guess it depends on which offshore contract-factory makes it.
 
 I've not had one from HF. At the price it is probably worth trying it 
 but based on my experience I'd strongly urge you to test it before 
 bothering to hack it.
 
 Good hunting.
 
 Regards,
 Kent
 
 
 
 
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Re: [Emc-users] Hall effect switches for limit / home switches

[Peter Loron]

On 06/14/2011 08:53 AM, Kirk Wallace wrote:
 On Mon, 2011-06-13 at 13:47 -0700, Peter Loron wrote:
 Hello, folks. Can anybody comment on using hall effect switches on a 3
 axis mill for limit / home switches? Seems like they would have some
 possible advantages over physical contact switches.

 Thanks.

 -Pete
 My Hardinge lathe uses Hall limit and home sensors. The Z axis target
 magnet is small and mounted such that there is minor protection from
 chips. There is a small gap between the magnet and sensors when aligned.
 If chips are in the magnet area, they get wiped off, but not too small
 such that small chips don't bind in the gap. the magnets are weak enough
 to have largesh chips fall off. The trip location accuracy only needs to
 be within about 2 or 3mm because, in my case, the home sensor is used in
 conjunction with the screw encoder index, which should be accurate
 to .002mm or better. What I like about Hall sensors is that they are
 machining fluid proof and will practically never wear out or change the
 trip point or behavior over time. I tend to think using mechanical
 micro-switches is silly, but a lot people use them to good effect. The
 Hardinge Z axis uses a Hall sensor with magnet in a micro-switch
 housing:
 http://sensing.honeywell.com/index.cfm?ci_id=154286la_id=1Ne=7sid=1308EB555700ci_id=154286N=3591+4294966517la_id=1
 Short URL: http://alturl.com/v2jzu

 These are mounted in a location well protected from chips, but the area
 is not sealed from coolant, which is fine because the sensors don't mind
 fluids.

 The Z sensors are in an aluminum threaded barrel similar to this one:
 http://search.digikey.com/scripts/DkSearch/dksus.dll?Detailname=480-3256-ND
 Short URL: http://alturl.com/netsd

 They tend to be expensive, but it should not be too difficult to machine
 a barrel and pot an IC sensor with leads into it

Yeah, I'm going to roll my own...I have a pile of Allegro sensors here. 
Also, retail on the Honeywell sensors is probably more that I've got 
invested into the whole mill...  :-)

-Pete

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Re: [Emc-users] Hall effect switches for limit / home switches

[Peter Loron]

Ah! Yeah, that would be great, thanks!

-Pete

On 06/14/2011 01:29 PM, doug metzler wrote:
 I did roll my own - let me know if you want me to send the Eagle PCB files
 and BOM.

 DougM

 On Tue, Jun 14, 2011 at 1:20 PM, Peter Loronpet...@standingwave.orgwrote:

 On 06/14/2011 08:53 AM, Kirk Wallace wrote:
 On Mon, 2011-06-13 at 13:47 -0700, Peter Loron wrote:
 Hello, folks. Can anybody comment on using hall effect switches on a 3
 axis mill for limit / home switches? Seems like they would have some
 possible advantages over physical contact switches.

 Thanks.

 -Pete
 My Hardinge lathe uses Hall limit and home sensors. The Z axis target
 magnet is small and mounted such that there is minor protection from
 chips. There is a small gap between the magnet and sensors when aligned.
 If chips are in the magnet area, they get wiped off, but not too small
 such that small chips don't bind in the gap. the magnets are weak enough
 to have largesh chips fall off. The trip location accuracy only needs to
 be within about 2 or 3mm because, in my case, the home sensor is used in
 conjunction with the screw encoder index, which should be accurate
 to .002mm or better. What I like about Hall sensors is that they are
 machining fluid proof and will practically never wear out or change the
 trip point or behavior over time. I tend to think using mechanical
 micro-switches is silly, but a lot people use them to good effect. The
 Hardinge Z axis uses a Hall sensor with magnet in a micro-switch
 housing:

 http://sensing.honeywell.com/index.cfm?ci_id=154286la_id=1Ne=7sid=1308EB555700ci_id=154286N=3591+4294966517la_id=1
 Short URL: http://alturl.com/v2jzu

 These are mounted in a location well protected from chips, but the area
 is not sealed from coolant, which is fine because the sensors don't mind
 fluids.

 The Z sensors are in an aluminum threaded barrel similar to this one:

 http://search.digikey.com/scripts/DkSearch/dksus.dll?Detailname=480-3256-ND
 Short URL: http://alturl.com/netsd

 They tend to be expensive, but it should not be too difficult to machine
 a barrel and pot an IC sensor with leads into it
 Yeah, I'm going to roll my own...I have a pile of Allegro sensors here.
 Also, retail on the Honeywell sensors is probably more that I've got
 invested into the whole mill...  :-)

 -Pete




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[Emc-users] Hall effect switches for limit / home switches

[Peter Loron]

Hello, folks. Can anybody comment on using hall effect switches on a 3 axis 
mill for limit / home switches? Seems like they would have some possible 
advantages over physical contact switches.

Thanks.

-Pete
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Re: [Emc-users] Hall effect switches for limit / home switches

[Peter Loron]

Sorry, should have qualified myself further...this would be used on a router 
mill that will only be doing wood, plastic, and a bit aluminum work. No steel.

-Pete

On Jun 13, 2011, at 1:53 PM, andy pugh wrote:

 On 13 June 2011 21:47, Peter Loron pet...@standingwave.org wrote:
 Hello, folks. Can anybody comment on using hall effect switches on a 3 axis 
 mill for limit / home switches? Seems like they would have some possible 
 advantages over physical contact switches.
 
 I think that you would have problems with inconsistent triggering
 positions, especially when bits of swarf get stuck to the magnets.
 
 -- 
 atp
 Torque wrenches are for the obedience of fools and the guidance of wise men
 
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[Emc-users] Can I use Update Manager with EMC?

[Peter Loron]

Hello, folks. I'm getting a machine set up for EMC2. I have the 10.04 
distro installed and the latency test looks ok so far.

Is it ok to apply updates from Update Manager? Is there a subset 
(kernel, etc) to never update?

Thanks.

-Pete
Issaqah, WA

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Re: [Emc-users] Can I use Update Manager with EMC?

[Peter Loron]

Cool, thanks.

On 06/01/2011 02:41 PM, Igor Chudov wrote:
 I update everything every night.

 It was rather trouble free.

 i


 On Wed, Jun 1, 2011 at 4:24 PM, Peter Loronpet...@standingwave.org  wrote:

 Hello, folks. I'm getting a machine set up for EMC2. I have the 10.04
 distro installed and the latency test looks ok so far.

 Is it ok to apply updates from Update Manager? Is there a subset
 (kernel, etc) to never update?

 Thanks.

 -Pete
 Issaqah, WA




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Re: [Emc-users] Dell D610 laptop success?

[Peter Loron]

On 05/31/2011 08:10 AM, Doug Goff wrote:
 Hi Pete,
 I run 3 routers and one mill with the 610's.  Turning off SMI is
 required to get any decent latency numbers.  I use a modified rtai.conf
 that loads the smi module.  I believe there is a bit of documentation in
 the wiki that explains how to deal with smi.
 I'm still running the previous LTS, as there seemed to be problems
 running the new version.  I didn't want to mess up good-running systems
 and I haven't looked into it yet.

Hi. Yes, that matches what I found today using the current 10.04 install 
ISO. Once I changed the rtai.conf to turn off SMI, I'm getting pretty 
nice jitter numbers ( 15uS) while running stress.

Out of curiosity, what driver hardware are you using with yours? 
Apparently some laptops only output 3.3V on the parallel port instead of 
the 5V many drivers require...

Thanks!

-Pete

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[Emc-users] Dell D610 laptop success?

[Peter Loron]

Hello, folks. I'm in the process of getting parts for a small CNC mill. I have 
a Dell D610 laptop I'm hoping to use for running EMC2. I know there are issues 
with some laptops.

Has anybody had experience with trying to run EMC2 on a D610?

Thanks!

-Pete
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Re: [Emc-users] Dell D610 laptop success?

[Peter Loron]

Thanks for the pointers. I'll give the live CD a shot tomorrow and definitely 
add them to the wiki.

I'm going to be using stepper motors.

I actually have 5 of the D610 laptops...picked them up for free...the company 
IT department was scrapping them.

-Pete

On May 30, 2011, at 5:58 PM, Kent A. Reed wrote:

 On 5/30/2011 8:20 PM, Peter Loron wrote:
 Hello, folks. I'm in the process of getting parts for a small CNC mill. I 
 have a Dell D610 laptop I'm hoping to use for running EMC2. I know there are 
 issues with some laptops.
 
 Has anybody had experience with trying to run EMC2 on a D610?
 
 Thanks!
 
 -Pete
 Hi, Pete.
 
 The wiki and the email archives will give you a sense of the general 
 disfavor of laptops.
 
 Since you already have the D610 on hand, download the EMC2 LiveCD and 
 run the latency test, preferably for longer than you contemplate a job 
 would take on your mill. Look at the numbers and compare to the latency 
 test results on the wiki (and add them to the wiki, pretty please!)
 
 You don't say whether you plan to use steppers or servos. The choice may 
 make the difference if your latency test numbers are moderately high.
 
 Good luck!
 
 Regards,
 Kent
 
 
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