Re: [Emc-users] Pittman BLDC + 7I39 experience?

John Kasunich wrote: > I recently picked up a couple Pittman ELCOM ST brushless servo motors. > I haven't been able to find data for the exact part number, but > everything > appear to match up with the N2311 with 18.3V windings as described in > this > data sheet: > > www.control-drive.com/Product

Re: [Emc-users] [Off] Ballscrew Support?

andy pugh wrote: > On 21 July 2012 23:04, Jeshua Lacock wrote: > > >> At 5cm/rev that is 547 IPM. I think I could happily live with that. >> > > That's a very high-lead ballscrew. I haven't seen any balls crews with > a pitch twice the diameter. Are you sure you are not a factor of 10 > ou

Re: [Emc-users] Broaching this screw.

On Saturday 21 July 2012 23:09:13 Jason Burton did opine: > What about torch heating the end and hot forging with the (cold) driver > of your choice? > Because the broach would be hot very fast. This actually works fairly well cold except its pretty snug & I have to get serious to get it bounce

Re: [Emc-users] Broaching this screw.

What about torch heating the end and hot forging with the (cold) driver of your choice? Perhaps start with a full depth pilot hole so the forging tool doesn't have to displace as much material. You could then quench and temper to preference. Jason On Jul 21, 2012 9:32 PM, "Gene Heskett" wrote:

Re: [Emc-users] Broaching this screw.

On Saturday 21 July 2012 22:14:28 Gene Heskett did opine: > On Saturday 21 July 2012 12:55:27 andy pugh did opine: > > On 21 July 2012 16:44, Gene Heskett wrote: > > > And I just now did hit a page with some size specs. Looks like T15 > > > is as big as I can shoot for. The thru hole in the ext

Re: [Emc-users] [Off] Ballscrew Support?

The idler pulleys push them together on either side of the pinion, which is where the force is transferred from the upper belt to the lower one. The lower one is glued to the machine frame along its entire length, so the force is then transferred to the frame. Neither belt has any significant tens

Re: [Emc-users] [Off] Ballscrew Support?

On Jul 21, 2012, at 6:47 PM, Peter C. Wallace wrote: > Ahh here it is: > > http://bell-everman.com/products/linear-positioning/servobelt-linear-sbl Thats pretty cool. I wonder what keeps the belts together? Gravity? Cheers, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated

[Emc-users] Pittman BLDC + 7I39 experience?

I recently picked up a couple Pittman ELCOM ST brushless servo motors. I haven't been able to find data for the exact part number, but everything appear to match up with the N2311 with 18.3V windings as described in this data sheet: www.control-drive.com/Products/Servo_Motors/PITTMAN/est_Brushless

Re: [Emc-users] [Off] Ballscrew Support?

I also remembered seeing a more commercial version of that somewhere, but like you I couldn't find it. When I found that forum post I stopped looking :) On Sat, Jul 21, 2012, at 05:47 PM, Peter C. Wallace wrote: > > > > Theres a commercial version of this or something very close (with I think >

Re: [Emc-users] [Off] Ballscrew Support?

> > Theres a commercial version of this or something very close (with I think > special belts) but my google foo is failing me now > > Peter Wallace > Mesa Electronics > Ahh here it is: http://bell-everman.com/products/linear-positioning/servobelt-linear-sbl Peter Wallace Mesa Electronics ---

Re: [Emc-users] [Off] Ballscrew Support?

On Sat, 21 Jul 2012, John Kasunich wrote: Date: Sat, 21 Jul 2012 20:24:22 -0400 From: John Kasunich Reply-To: "Enhanced Machine Controller (EMC)" To: "Enhanced Machine Controller (EMC)" Subject: Re: [Emc-users] [Off] Ballscrew Support? On Sat, Jul 21, 2012, at 06:04 PM, Jeshua Lacock

Re: [Emc-users] [Off] Ballscrew Support?

On Jul 21, 2012, at 6:24 PM, John Kasunich wrote: > n Sat, Jul 21, 2012, at 06:04 PM, Jeshua Lacock wrote: >> >> Damn. Anyone want to buy two brand new ballscrews? >> >> :D >> >> Maybe I will use them on a laser cutter instead. High speed is not as >> important to me on a laser cutter as it is

Re: [Emc-users] [Off] Ballscrew Support?

On Jul 21, 2012, at 5:49 PM, andy pugh wrote: > On 21 July 2012 23:04, Jeshua Lacock wrote: > >> At 5cm/rev that is 547 IPM. I think I could happily live with that. > > That's a very high-lead ballscrew. I haven't seen any balls crews with > a pitch twice the diameter. Are you sure you are not

Re: [Emc-users] [Off] Ballscrew Support?

Have you considered rack and pinion for your machine. CNCrouterparts has a very affordable solution: http://www.cncrouterparts.com/rack-and-pinion-drive-nema-34-p-80.htmlI've not used them but they have gotten good reviews from users at CNCzone and I've been happy with other components of their

Re: [Emc-users] [Off] Ballscrew Support?

On Sat, Jul 21, 2012, at 06:04 PM, Jeshua Lacock wrote: > > Damn. Anyone want to buy two brand new ballscrews? > > :D > > Maybe I will use them on a laser cutter instead. High speed is not as > important to me on a laser cutter as it is on a 3D milling machine. Path > lengths are *much* longer

Re: [Emc-users] [Off] Ballscrew Support?

On Jul 21, 2012, at 5:49 PM, andy pugh wrote: > On 21 July 2012 23:04, Jeshua Lacock wrote: > >> At 5cm/rev that is 547 IPM. I think I could happily live with that. > > That's a very high-lead ballscrew. I haven't seen any balls crews with > a pitch twice the diameter. Are you sure you are not

Re: [Emc-users] [Off] Ballscrew Support?

On 21 July 2012 23:04, Jeshua Lacock wrote: > At 5cm/rev that is 547 IPM. I think I could happily live with that. That's a very high-lead ballscrew. I haven't seen any balls crews with a pitch twice the diameter. Are you sure you are not a factor of 10 out? -- atp If you can't fix it, you don'

Re: [Emc-users] Axis Gui will not run

Kent A. Reed wrote: > Rather, I'd have to ask what else was changed when the Axiom card was > installed? Call me an ornery cuss, but I suspect changes were made to > configuration files that interfere with Axis starting. > Well, a very easy way to test it is to try to run glxgears. That may

Re: [Emc-users] Axis Gui will not run

Eric Keller wrote: > I'm guessing it has something to do with the real-time system not starting, > but who knows? In general, being able to diagnose using dmesg first > requires that one get used to seeing the output of dmesg. > OK, well, to us LinuxCNC insiders, Axis not starting is different

Re: [Emc-users] [Off] Ballscrew Support?

On Sat, 21 Jul 2012 14:41:01 +0300, you wrote: >2012/7/21 Erik Christiansen : >> >> In any event, I'd fix a long slender ballscrew, to avoid whipping, and >> rotate the nut. > >I did this on the last machine I built with this exact intention in my mind. >The overall result - failure. I seriously d

Re: [Emc-users] C Compiler - MPLAB

On Sat, 21 Jul 2012 17:15:32 -0400 "Kent A. Reed" wrote: > On 7/21/2012 4:46 PM, Cathrine Hribar wrote: >> >> >> On Fri, 20 Jul 2012 23:07:09 -0400 >>"Kent A. Reed" wrote: >>> On 7/20/2012 10:10 PM, Cathrine Hribar wrote: On Mon, 16 Apr 2012 14:47:49 -0400 Erik Friesen wro

Re: [Emc-users] [Off] Ballscrew Support?

On Jul 21, 2012, at 9:50 AM, Jon Elson wrote: > Jeshua Lacock wrote: >> >> It looks like over a 10 foot span I have about 24mm (0.96 inches) of sag in >> the middle. >> > 10 foot span? 25 mm diameter? Oh, my, that sounds WAY past the safe range. > See http://www.nookindustries.com/ball/Ball

Re: [Emc-users] Axis Gui will not run

On 7/21/2012 5:24 PM, Dave Keeton wrote: > ... > > Sorry if I caused such an uproar just asking a simple question! GEEEZ > Guys! Just kidding.Yes I should have given more info as I knew > better being a service tech for CNC machines myself. Sorry, it wont > happen again! Turns out that long bef

Re: [Emc-users] Axis Gui will not run

On Sat, 2012-07-21 at 17:02 -0400, Kent A. Reed wrote: > On 7/21/2012 12:38 PM, Dave Keeton wrote: > > All, > >I installed a Axiom ax5214h card in my control. Since doing this > > the Axis GUI will not start up in my config. TKEMC runs fine. Any help > > would be appreciated. > > > > Dave >

Re: [Emc-users] C Compiler - MPLAB

On 7/21/2012 4:46 PM, Cathrine Hribar wrote: > > > On Fri, 20 Jul 2012 23:07:09 -0400 >"Kent A. Reed" wrote: >> On 7/20/2012 10:10 PM, Cathrine Hribar wrote: >>> On Mon, 16 Apr 2012 14:47:49 -0400 >>> Erik Friesen wrote: On Mon, Apr 16, 2012 at 2:33 PM, Dave wrote: > On 4/1

Re: [Emc-users] Axis Gui will not run

On Sat, 2012-07-21 at 17:45 +0100, andy pugh wrote: > On 21 July 2012 17:38, Dave Keeton wrote: > > All, > > I installed a Axiom ax5214h card in my control. Since doing this > > the Axis GUI will not start up in my config. TKEMC runs fine. Any help > > would be appreciated. > > Probably a g

Re: [Emc-users] Axis Gui will not run

On 7/21/2012 12:38 PM, Dave Keeton wrote: > All, >I installed a Axiom ax5214h card in my control. Since doing this > the Axis GUI will not start up in my config. TKEMC runs fine. Any help > would be appreciated. > > Dave > > Dave: You've got a lively side-bar exchange going among Andy, Er

Re: [Emc-users] C Compiler - MPLAB

On Fri, 20 Jul 2012 23:07:09 -0400 "Kent A. Reed" wrote: > On 7/20/2012 10:10 PM, Cathrine Hribar wrote: >> >> On Mon, 16 Apr 2012 14:47:49 -0400 >>Erik Friesen wrote: >>> On Mon, Apr 16, 2012 at 2:33 PM, Dave wrote: >>> On 4/16/2012 1:15 PM, Erik Friesen wrote: http://embedde

Re: [Emc-users] Axis Gui will not run

On 21 July 2012 18:45, Kent A. Reed wrote: > Errm. Dave said "Since doing this..." which suggests Axis used to start > but doesn't start now that he has installed the Axiom card. I was rather assuming that the Axiom card was a graphics card... But if Axis doesn't start, but TKlinux does (assumi

Re: [Emc-users] Axis Gui will not run

On Sat, Jul 21, 2012 at 3:31 PM, Kent A. Reed wrote: > > Agreed. It's also my first response to a problem. I haven't done my > homework to figure out what messages to expect from a balky Axis setup. > I figured the moment I said "check dmesg output" someone would ask what > to look for, so I didn'

Re: [Emc-users] Axis Gui will not run

On 7/21/2012 2:57 PM, Eric Keller wrote: > On Sat, Jul 21, 2012 at 1:45 PM, Kent A. Reed wrote: > >> Rather, I'd have to ask what else was changed when the Axiom card was >> installed? Call me an ornery cuss, but I suspect changes were made to >> configuration files that interfere with Axis starti

Re: [Emc-users] Axis Gui will not run

On Sat, Jul 21, 2012 at 1:45 PM, Kent A. Reed wrote: > > Rather, I'd have to ask what else was changed when the Axiom card was > installed? Call me an ornery cuss, but I suspect changes were made to > configuration files that interfere with Axis starting. > > Logic dictates that if the computer i

Re: [Emc-users] Axis Gui will not run

On 7/21/2012 12:45 PM, andy pugh wrote: > On 21 July 2012 17:38, Dave Keeton wrote: >> All, >>I installed a Axiom ax5214h card in my control. Since doing this >> the Axis GUI will not start up in my config. TKEMC runs fine. Any help >> would be appreciated. > Probably a graphics card or op

Re: [Emc-users] Broaching this screw.

On Saturday 21 July 2012 12:55:27 andy pugh did opine: > On 21 July 2012 16:44, Gene Heskett wrote: > > And I just now did hit a page with some size specs. Looks like T15 is > > as big as I can shoot for. The thru hole in the extension is a good > > fit for a 3.5 mm allen wrench. > > Broach it

Re: [Emc-users] NFS hassles [Was: Spindle hooked to dc servo amp]

On Saturday 21 July 2012 12:14:51 Erik Christiansen did opine: > On 21.07.12 07:51, Gene Heskett wrote: > > On Saturday 21 July 2012 06:55:06 Erik Christiansen did opine: > > > and seems to be reasonably talkative, even when things are going > > > well. > > > > Not so much, but maybe a clue from

Re: [Emc-users] Axis Gui will not run

On 21 July 2012 17:38, Dave Keeton wrote: > All, > I installed a Axiom ax5214h card in my control. Since doing this > the Axis GUI will not start up in my config. TKEMC runs fine. Any help > would be appreciated. Probably a graphics card or opengl issue, there are possible solutions to both

[Emc-users] Axis Gui will not run

All, I installed a Axiom ax5214h card in my control. Since doing this the Axis GUI will not start up in my config. TKEMC runs fine. Any help would be appreciated. Dave -- Live Security Virtual Conference Exclusive

Re: [Emc-users] Broaching this screw.

On 21 July 2012 16:44, Gene Heskett wrote: > And I just now did hit a page with some size specs. Looks like T15 is as > big as I can shoot for. The thru hole in the extension is a good fit for a > 3.5 mm allen wrench. Broach it hex then, it can't be _that_ hard. Just don't do your real part fi

Re: [Emc-users] NFS hassles [Was: Spindle hooked to dc servo amp]

On Saturday 21 July 2012 11:53:33 Kent A. Reed did opine: > Gene: > > I'm not going to comment your recent emails because 1) I don't want to > take the time to understand the information scattered through them and > 2) the result would be unreadable:-) > > Assuming all hosts have the appropriate

Re: [Emc-users] [Off] Ballscrew Support?

This web page has a chart for calculating the "critical speed" for ball screws: http://www.roton.com/application_engineering.aspx   +++ We are like tenant farmers chopping down the fence around our house for fuel when we

Re: [Emc-users] [Off] Ballscrew Support?

Jeshua Lacock wrote: > On Jul 20, 2012, at 9:13 PM, Stuart Stevenson wrote: > > >> Andy's solution is the correct solution. A string will fold under >> compression. This will allow the supports to collapse together when the nut >> moves their direction on the screw. The string will pull the supp

Re: [Emc-users] [Off] Ballscrew Support?

Jeshua Lacock wrote: > > It looks like over a 10 foot span I have about 24mm (0.96 inches) of sag in > the middle. > 10 foot span? 25 mm diameter? Oh, my, that sounds WAY past the safe range. See http://www.nookindustries.com/ball/BallCalculators.cfm#CriticalSpeed for a critical speed calcul

Re: [Emc-users] [Off] Ballscrew Support?

On Saturday 21 July 2012 11:45:42 andy pugh did opine: > On 21 July 2012 05:09, Jeshua Lacock wrote: > > 550 RPMs does not exactly strike me as spinning at high speed. > > Besides, wouldn't the gyroscopic force help stabilized oscillations? > > No, centrifugal force acts as a positive feedback o

Re: [Emc-users] Broaching this screw.

On Saturday 21 July 2012 11:37:54 andy pugh did opine: > On 21 July 2012 05:21, Gene Heskett wrote: > > It looks like I am stuck with the 3.5mm allen socket to drive this. > > I can't help feeling that a Torx head would be easier to make,as it is > just about mill-able. > It might take some expe

Re: [Emc-users] [Off] Ballscrew Support?

Jeshua Lacock wrote: > On Jul 20, 2012, at 6:00 PM, Stephen Dubovsky wrote: > > >> Sag is only the start of the problem. The whip is going to be the real >> problem. >> > > Hi Stephen, > > I am not sure I understand what you mean by "whip"? > > Long, thin shafts tend to "whip" when sp

Re: [Emc-users] Broaching this screw.

On Saturday 21 July 2012 10:51:04 andy pugh did opine: > On 21 July 2012 05:21, Gene Heskett wrote: > > It looks like I am stuck with the 3.5mm allen socket to drive this. > > I can't help feeling that a Torx head would be easier to make,as it is > just about mill-able. With sub .03125" mills.

Re: [Emc-users] [Off] Ballscrew Support?

2012/7/21 Erik Christiansen : > > Of the other machines that you've built, do any have a horizontal > ballscrew as long and slender as this one, spun at similar speeds? That was the first time I used ballscrews, so I have no other experiece to compare with. For the next machines I am designing bal

Re: [Emc-users] NFS hassles [Was: Spindle hooked to dc servo amp]

On 21.07.12 07:51, Gene Heskett wrote: > On Saturday 21 July 2012 06:55:06 Erik Christiansen did opine: > > and seems to be reasonably talkative, even when things are going > > well. > Not so much, but maybe a clue from "service nfs-kernel-server restart": > > Jul 21 06:53:30 coyote kernel: [6982

Re: [Emc-users] [Off] Ballscrew Support?

On 7/21/2012 8:42 AM, andy pugh wrote: > On 21 July 2012 05:09, Jeshua Lacock wrote: > >> 550 RPMs does not exactly strike me as spinning at high speed. Besides, >> wouldn't the gyroscopic force help stabilized oscillations? > No, centrifugal force acts as a positive feedback on any off-centre mo

Re: [Emc-users] [Off] Ballscrew Support?

Hi Jeshua > I am sure with a 10-foot span that the horizontal ballscrews > will sag a little from gravity. Is this much of a concern? I think for long screws it generally a good idea not to drive the ball-screws, but the nut. While this will not reduce the sag you mentioned, it will greatly i

Re: [Emc-users] NFS hassles [Was: Spindle hooked to dc servo amp]

Gene: I'm not going to comment your recent emails because 1) I don't want to take the time to understand the information scattered through them and 2) the result would be unreadable:-) Assuming all hosts have the appropriate packages installed, some thoughts are: 1) maybe this is all working

Re: [Emc-users] [Off] Ballscrew Support?

> I am not sure what yo mean by preload/stretch though. > > > After installing the ballscrew you then put an indicator on the end of the ball screw with the mag base on the machine base. You then tighten the bearing preload until you see .007 to .009 stretch of the end of the ballscrew. I don't kno

Re: [Emc-users] [Off] Ballscrew Support?

For long machines where the cutting forces are not hugely significant (such as a wood router) could one not used a aircraft cable setup? The cable could then be run over a motorized pulley. Something I always thought of but haven't fleshed it out further. Brian ---

Re: [Emc-users] [Off] Ballscrew Support?

On 21.07.12 14:41, Viesturs Lācis wrote: > 2012/7/21 Erik Christiansen : > > > > In any event, I'd fix a long slender ballscrew, to avoid whipping, and > > rotate the nut. > > I did this on the last machine I built with this exact intention in my mind. > The overall result - failure. I seriously d

Re: [Emc-users] [Off] Ballscrew Support?

On 21 July 2012 05:09, Jeshua Lacock wrote: > 550 RPMs does not exactly strike me as spinning at high speed. Besides, > wouldn't the gyroscopic force help stabilized oscillations? No, centrifugal force acts as a positive feedback on any off-centre movement. As Steve has said, there are specs f

Re: [Emc-users] C Compiler - MPLAB

I don't know, I am not familiar with HID in linux. I would suggest posting, or searching the MplabX forumsfor this info, if you can't get anywhere On Fri, Jul 20, 2012 at 11:07 PM, Kent A. Reed wrote: > On 7/20/2012 10:10 PM, Cathrine Hribar wrote: > >

Re: [Emc-users] NFS hassles [Was: Spindle hooked to dc servo amp]

On Saturday 21 July 2012 06:55:06 Erik Christiansen did opine: > On 20.07.12 10:51, Gene Heskett wrote: > > On Friday 20 July 2012 10:18:49 Erik Christiansen did opine: > > > Would it help if we again posted some advice on how to most easily > > > change the uids on one host to match another? > >

Re: [Emc-users] Broaching this screw.

On 21 July 2012 05:21, Gene Heskett wrote: > It looks like I am stuck with the 3.5mm allen socket to drive this. I can't help feeling that a Torx head would be easier to make,as it is just about mill-able. It might take some experimenting and tweaking (maybe in a block of plastic) to get the sha

Re: [Emc-users] [Off] Ballscrew Support?

2012/7/21 Erik Christiansen : > > In any event, I'd fix a long slender ballscrew, to avoid whipping, and > rotate the nut. I did this on the last machine I built with this exact intention in my mind. The overall result - failure. I seriously doubt I will ever do that again. Longest screw was 2800

Re: [Emc-users] [Off] Ballscrew Support?

On 20.07.12 16:18, Jeshua Lacock wrote: > I am sure with a 10-foot span that the horizontal ballscrews will sag > a little from gravity. Is this much of a concern? Does anyone know of > a trick to put some kind of support in the middle of the span? I can't > think of any practical way. One method

Re: [Emc-users] Linuxcnc 5 axis coolness

since you probably have a computer, you probably also already have a laser. --- On Fri, 7/20/12, andy pugh wrote: > From: andy pugh > Subject: Re: [Emc-users] Linuxcnc 5 axis coolness > To: "Enhanced Machine Controller (EMC)" > Date: Friday, July 20, 2012, 3:59 AM > On 20 July 2012 11:42, Clau

Re: [Emc-users] NFS hassles [Was: Spindle hooked to dc servo amp]

On 20.07.12 12:18, Jon Elson wrote: > Erik Christiansen wrote: > > Would it help if we again posted some advice on how to most easily > > change the uids on one host to match another? > > > Gee, something like : > sudo chown -Rf x:y directory > will do most of the job, then you need to make sure

Re: [Emc-users] NFS hassles [Was: Spindle hooked to dc servo amp]

On 20.07.12 10:51, Gene Heskett wrote: > On Friday 20 July 2012 10:18:49 Erik Christiansen did opine: > > Would it help if we again posted some advice on how to most easily > > change the uids on one host to match another? > > While that could I suppose be useful when the distro's involved are mix

Re: [Emc-users] [Off] Ballscrew Support?

On Fri, 20 Jul 2012 20:00:10 -0400, you wrote: >Sag is only the start of the problem. The whip is going to be the real >problem. The ballnut is no holp holding it up at the limits of travel. Not strictly true - the size needs to be CAREFULLY calculated for the job in hand and the mounting metho

Re: [Emc-users] Spindle hooked to dc servo amp

On Fri, 20 Jul 2012 13:05:22 -0500, you wrote: >Get well soon! If you feel like experimenting - I think you would just >change > >net spindle-position encoder.0.position => motion.spindle-revs > >to > >net spindle-position encoder.0.position-interpolated => motion.spindle-revs Thanks Sam - I'll