On Thu, 2007-10-11 at 20:53 -0500, Jon Elson wrote:
Kirk Wallace wrote:
What is the status of PID_MAX_VEL and PWM_OUTPUT_SCALE? My understanding
is that they were created to fix persistence issues. I am using EMC
2.1.7 so should I still use them?
Arrghhh! I don't actually know.
Kirk,
Just to add a data point on my minimill system, it has 128000
encoder counts per inch. I can get the following error down to
about 200 uInch peak, up to 50 IPM or more. But, it takes some
effort to tune it to that level.
On my Bridgeport, I have 2 counts per inch on X and Y, and I
Kirk Wallace wrote:
On Thu, 2007-10-11 at 20:53 -0500, Jon Elson wrote:
Kirk Wallace wrote:
What is the status of PID_MAX_VEL and PWM_OUTPUT_SCALE? My understanding
is that they were created to fix persistence issues. I am using EMC
2.1.7 so should I still use them?
Arrghhh! I don't
I was wondering how to use this functionality.
When I select Settings | Set Backlash,
I get a baffling EMC Calibration dialog that
asks for:
Axis: 0
P Gain: 100.0
I Gain: 0.0
D Gain: 0.0
Pos FF Gain: 0.0
Vel FF Gain: 0.0
Acc FF Gain: 0.0
Backlash: 0.0
Bias: 0.0
Hello Aram,
It's a great world we live in when we can communicate even though we don't
agree on how many letters in the alphabet. :-)
I don't think the problem is quite that simple. For example, your approach
doesn't take tool length or diameter compenstation into account. I don't
think we would
I posted last week about steeper motors maybe week?
So I thought I would follow up and ask some more questions.
Anyway I was using terminal #7 on the gecko 210 tied to my estop to ground to
disable the drive.
This pulls the motor windings to zero, (gecko doc,s)
I always wonder why the drives
Kirk Wallace wrote:
I was also thinking that it would be good to have EMC loop an axis move
and have halscope update on the trigger, as it already does, and then be
able to tweak the PID settings as EMC loops.
When I do PID tuning I usually skip EMC completely. I just set
up a simple single
Alfred Smart wrote:
I posted last week about steeper motors maybe week?
So I thought I would follow up and ask some more questions.
Anyway I was using terminal #7 on the gecko 210 tied to my estop to
ground to disable the drive.
This pulls the motor windings to zero, (gecko doc,s)
I always
On Fri, 2007-10-12 at 20:37 -0500, Jon Elson wrote:
... snip
So at 5k cpi on my lathe, I should be able to get similar results, I
hope. Thanks Jon.
Well, 5000 is a lot less than 128,000, and 4 times coarser than
my 20,000 counts/inch. So, it would be normal to expect the
best
