Re: [Emc-users] After re-tuning, the mill is accurate and quiet, but does not hold position as well against force.

2010-09-16 Thread Jon Elson
Igor Chudov wrote: > My encoders have 1024 counts, or 4096 pulses per revolution. One > revolution is 2.5mm table motion. This means that one pulse is .24 > inch or 0.00061 mm per count. It is a little hard to figure out how > miscalculations of speed from discrete pulse counts affect > positio

Re: [Emc-users] Inv-Tetrapod-Volley. (it was: Free Form Motion)

2010-09-16 Thread BRIAN GLACKIN
Can you describe the motion of your fourth axis? Linear or radial? If linear, what axis is it parallel to? Ir radial, what axis is its center of rotation parallel to? Brian On Thu, Sep 16, 2010 at 7:29 PM, Andy Pugh wrote: > On 15 September 2010 18:24, Spiderdab <77...@tiscali.it> wrote: > >

Re: [Emc-users] Inv-Tetrapod-Volley. (it was: Free Form Motion)

2010-09-16 Thread Andy Pugh
On 15 September 2010 18:24, Spiderdab <77...@tiscali.it> wrote: > > hallo, in my inverted tetrapod i've set the 4 axis as: X Y Z A, in this way: At the moment that seems to be the only way to get 4 working joints, even on a 3-axis machine like yours. I tried setting up 3 axes in the INI and 4 joi

Re: [Emc-users] Inv-Tetrapod-Volley. (it was: Free Form Motion)

2010-09-16 Thread Spiderdab
Il 16/09/2010 11:23, Andy Pugh ha scritto: > On 16 September 2010 09:39, Spiderdab<77...@tiscali.it> wrote: > > >> about jogging i'm allright. i can jog in both mode. only, when i jog the >> joint 3, it is governed by the spindle speed instead of jog speed. (with >> XYZA) >> > That seems

Re: [Emc-users] Video Accuracy

2010-09-16 Thread Andy Pugh
On 16 September 2010 20:28, Slavko Kocjancic wrote: > > I just get gqvideocam freware and scrap out all unnecesary stuff. I think is > not worth to examine in detail if that cant be integrated onto axis for > example Axis is written in Python (I think) so perhaps this page would help? http://wwwx

Re: [Emc-users] Video Accuracy

2010-09-16 Thread Slavko Kocjancic
I just get gqvideocam freware and scrap out all unnecesary stuff. I think is not worth to examine in detail if that cant be integrated onto axis for example 010/9/16 Kirk Wallace > On Thu, 2010-09-16 at 10:16 -0700, Kirk Wallace wrote: > ... snip > > I know nothing about video software. Does a

Re: [Emc-users] Video Accuracy

2010-09-16 Thread Kirk Wallace
On Thu, 2010-09-16 at 10:16 -0700, Kirk Wallace wrote: ... snip > I know nothing about video software. Does anyone know where the live > picture on the screen lives? Can it be accessed? My thinking is, one > could have the picture be black and white, add a red pixel for the > center, then have a cl

Re: [Emc-users] Beginner question about cable lengths

2010-09-16 Thread Yi-Shin Li
On Fri, Sep 17, 2010 at 12:50 AM, Yi-Shin Li wrote: > > > On Thu, Sep 16, 2010 at 4:47 PM, Alex Joni wrote: > >> > Attached 2 video links for SCARA Robot controlled by EMC2 through USB >> > interface: >> > http://www.youtube.com/watch?v=EwfhjVV7D7Q >> > http://www.youtube.com/watch?v=5LS9GxZN6s4

Re: [Emc-users] Video Accuracy

2010-09-16 Thread Kirk Wallace
On Thu, 2010-09-16 at 09:29 +0200, Slavko Kocjancic wrote: ... snip > I use that: > > http://tinyurl.com/37s4djk* > > *It's just webcam over EMC2. It's not integrated as my programming > knowledge is to low. So I use it to find edges and other things. But I > had to jog machine to precise possi

Re: [Emc-users] Beginner question about cable lengths

2010-09-16 Thread Yi-Shin Li
On Thu, Sep 16, 2010 at 11:47 PM, Kai Schaeffer wrote: > > > Both are with MESA-7i43 (USB/FPGA) and Servo Drivers. > > The usb cable length could be 1.8m (verified with EMI NOISE testing). > > > > Regarding the USB specification the cable length could be 5m. Have you > tried a longer cable or wha

Re: [Emc-users] Beginner question about cable lengths

2010-09-16 Thread Yi-Shin Li
On Fri, Sep 17, 2010 at 12:04 AM, Andy Pugh wrote: > On 16 September 2010 05:49, Yi-Shin Li wrote: > > > Attached 2 video links for SCARA Robot controlled by EMC2 through USB > > interface: > > Did you write your own driver to do this? > As far as I know the current EMC2 HAL drivers do not suppor

Re: [Emc-users] Beginner question about cable lengths

2010-09-16 Thread Yi-Shin Li
On Thu, Sep 16, 2010 at 4:47 PM, Alex Joni wrote: > > Attached 2 video links for SCARA Robot controlled by EMC2 through USB > > interface: > > http://www.youtube.com/watch?v=EwfhjVV7D7Q > > http://www.youtube.com/watch?v=5LS9GxZN6s4 > > > > Both are with MESA-7i43 (USB/FPGA) and Servo Drivers. >

Re: [Emc-users] After re-tuning, the mill is accurate and quiet, but does not hold position as well against force.

2010-09-16 Thread Igor Chudov
On Thu, Sep 16, 2010 at 10:36 AM, Jon Elson wrote: > Igor Chudov wrote: >> Jon, siggen is very nifty. Thanks. >> >> I spent some time adjusting Z parameters yesterday. A change of P from >> 300 to 550 has made the servo motor a lot stiffer, and now the best I >> can do by hand, is move the Z axis

Re: [Emc-users] Beginner question about cable lengths

2010-09-16 Thread Andy Pugh
On 16 September 2010 05:49, Yi-Shin Li wrote: > Attached 2 video links for SCARA Robot controlled by EMC2 through USB > interface: Did you write your own driver to do this? As far as I know the current EMC2 HAL drivers do not support a USB-connected 7i43. -- atp --

Re: [Emc-users] simple servo amplifier

2010-09-16 Thread Chris Radek
On Thu, Sep 16, 2010 at 10:14:00AM -0500, Stuart Stevenson wrote: > OOOK - I assumed it represented 100% - I hadn't paid any attention to > that. > Is there a way to set a max limit or set a default? Currently both those features are unimplemented... It might also be nice if it were saved a

Re: [Emc-users] Beginner question about cable lengths

2010-09-16 Thread Kai Schaeffer
> Attached 2 video links for SCARA Robot controlled by EMC2 through USB > interface: > http://www.youtube.com/watch?v=EwfhjVV7D7Q > http://www.youtube.com/watch?v=5LS9GxZN6s4 > Very nice machines... > Both are with MESA-7i43 (USB/FPGA) and Servo Drivers. > The usb cable length could be 1.8m (

Re: [Emc-users] simple servo amplifier

2010-09-16 Thread Jon Elson
Stuart Stevenson wrote: > Gentlemen, > I have another question/problem. The EMC2 will not move the machine faster > than 100 ipm. I have changed the max everything to high numbers and still > get only 100 ipm. It seems as if the limit again is knowledge/intelligence. > Well, PID_MAX_VEL = 30,

Re: [Emc-users] After re-tuning, the mill is accurate and quiet, but does not hold position as well against force.

2010-09-16 Thread Jon Elson
Igor Chudov wrote: > Jon, siggen is very nifty. Thanks. > > I spent some time adjusting Z parameters yesterday. A change of P from > 300 to 550 has made the servo motor a lot stiffer, and now the best I > can do by hand, is move the Z axis by about 0.0003" or so. I can live > with it. > Yes, tha

Re: [Emc-users] simple servo amplifier

2010-09-16 Thread Stuart Stevenson
OOOK - I assumed it represented 100% - I hadn't paid any attention to that. Is there a way to set a max limit or set a default? thanks :) Stuart On Thu, Sep 16, 2010 at 8:53 AM, Chris Radek wrote: > On Thu, Sep 16, 2010 at 08:24:00AM -0500, Stuart Stevenson wrote: > > Gentlemen, > > I have

Re: [Emc-users] simple servo amplifier

2010-09-16 Thread Chris Radek
On Thu, Sep 16, 2010 at 08:24:00AM -0500, Stuart Stevenson wrote: > Gentlemen, > I have another question/problem. The EMC2 will not move the machine faster > than 100 ipm. I have changed the max everything to high numbers and still On touchy's right side is a MV button - that is max velocity, yo

Re: [Emc-users] simple servo amplifier

2010-09-16 Thread Stuart Stevenson
Gentlemen, I have another question/problem. The EMC2 will not move the machine faster than 100 ipm. I have changed the max everything to high numbers and still get only 100 ipm. It seems as if the limit again is knowledge/intelligence. :) I disconnected the signal to the DAC output and set the

Re: [Emc-users] After re-tuning, the mill is accurate and quiet, but does not hold position as well against force.

2010-09-16 Thread Igor Chudov
Jon, siggen is very nifty. Thanks. I spent some time adjusting Z parameters yesterday. A change of P from 300 to 550 has made the servo motor a lot stiffer, and now the best I can do by hand, is move the Z axis by about 0.0003" or so. I can live with it. So, what would you say, does velocity mode

[Emc-users] Henrik Olsson, are you here?

2010-09-16 Thread Sven Wesley
Sorry guys, but one of my contacts in the EMC-sphere seems to have changed e-mail adress. Henrik, if you read this please reply to me! Regards, Sven -- Start uncovering the many advantages of virtual appliances and start

Re: [Emc-users] Inv-Tetrapod-Volley. (it was: Free Form Motion)

2010-09-16 Thread Andy Pugh
On 16 September 2010 09:39, Spiderdab <77...@tiscali.it> wrote: > about jogging i'm allright. i can jog in both mode. only, when i jog the > joint 3, it is governed by the spindle speed instead of jog speed. (with > XYZA) That seems rather odd, because "A" is not the spindle, generally. And you d

Re: [Emc-users] Beginner question about cable lengths

2010-09-16 Thread Alex Joni
> Attached 2 video links for SCARA Robot controlled by EMC2 through USB > interface: > http://www.youtube.com/watch?v=EwfhjVV7D7Q > http://www.youtube.com/watch?v=5LS9GxZN6s4 > > Both are with MESA-7i43 (USB/FPGA) and Servo Drivers. > The usb cable length could be 1.8m (verified with EMI NOISE test

Re: [Emc-users] Inv-Tetrapod-Volley. (it was: Free Form Motion)

2010-09-16 Thread Spiderdab
Il 15/09/2010 20:09, Andy Pugh ha scritto: > On 15 September 2010 18:24, Spiderdab<77...@tiscali.it> wrote: > > >>> [AXIS_0] to [AXIS_3] >>> > These are "Joints" 0 to 3, and in your case don't necessarily > correspond to cartesian axes. > > You should be able to jog in XYZ in "World" m

Re: [Emc-users] Video Accuracy

2010-09-16 Thread Slavko Kocjancic
Na 15.9.2010 22:03, Kirk Wallace je pisal: > Well that lets me know that I can expect to not need any fancy optics. I > didn't see anything in the thread saying that Mach did anything other > than show a video window. I suppose I could put AXIS and a separate > video window up, but the bees knees

Re: [Emc-users] Video Accuracy

2010-09-16 Thread Slavko Kocjancic
Na 16.9.2010 0:29, chrisinnana...@hotmail.com je pisal: > Someone has used a webcam to help align with emc. Though I don't think its > very fancy . Look in cnczone under emc I might have added a link to the wiki > ... > > Just check my post before. It's not fancy but it's very usable. And abo

Re: [Emc-users] Beginner question about cable lengths

2010-09-16 Thread Yi-Shin Li
On Thu, Sep 16, 2010 at 1:55 PM, Viesturs Lācis wrote: > 2010/9/16 Yi-Shin Li : > > On Tue, Sep 14, 2010 at 8:20 PM, Kai Schaeffer > wrote: > > > > Attached 2 video links for SCARA Robot controlled by EMC2 through USB > > interface: > > http://www.youtube.com/watch?v=EwfhjVV7D7Q > > http://www.yo