I am a newbie to EMC2 but not to machining. I am thinking about creating a
CNC Mill with EMC2 however, my problem is with backlash compensation. Is it
possible to use DRO scales with EMC2 to have the feed back that would allow
you to know exactly the tool position?
Thanks
WGB
Hi,
It is indeed possible to use linear scales with emc. With backlash
they do not tune as well as encoders on the
ballscrew. If the ballscrews are very tight the performance should be
excellent. Recently there was a proposal by someone on the list
(JMK?) to use encoders on the
Dave Engvall wrote:
Hi,
It is indeed possible to use linear scales with emc. With backlash
they do not tune as well as encoders on the
ballscrew. If the ballscrews are very tight the performance should be
excellent. Recently there was a proposal by someone on the list
(JMK?) to use
On Tue, 2008-01-08 at 12:30 -0600, Jon Elson wrote:
Dave Engvall wrote:
Hi,
It is indeed possible to use linear scales with emc. With backlash
they do not tune as well as encoders on the
ballscrew. If the ballscrews are very tight the performance should be
excellent. Recently
The most satisfactory tuning I've gotten on loose ballscrews , i.e.
0.003, is with a 2500 cpr encoder on the end
of the ball screw. In order of increasing ease of tuning,
smoothness, etc. the linear scale was worst, an encoder
on the servo motor shaft was next and the best results were
for the rest of you, i think kirk is talking about this:
http://www.hobbycnc.hu/CNC/Otletek/Otletek.htm
anyone speak hungarian?
On Tue, 8 Jan 2008, Kirk Wallace wrote:
It would be interesting to find the least invasive ways to eliminate the
backlash. I don't know what it's called, but I have
Hey Kirk what kind of linear encoders were u using? Do you know what kind of
signal they produce ? square edge (quad) or sin ? Sin wave signal encoders can
be subdivided to produce more counts. .0005 inches per count is too course for
pid tuning. Also I found that when i stopped the slide
On Wed, 2008-01-09 at 03:23 +, Chris Morley wrote:
Hey Kirk what kind of linear encoders were u using? Do you know
what kind of signal they produce ? square edge (quad) or sin ?
My scales have quadrature output.
Sin wave signal encoders can be subdivided to produce more counts.
.0005
