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by TomKerekes
Tue Aug 09, 2022 6:38 pm
Forum: Configuration Issues
Topic: Stuck at the start on servo tuning w/ Youtube video.
Replies: 17
Views: 858

Re: Stuck at the start on servo tuning w/ Youtube video.

I couldn't attach the step response save data because it exceeds the 1 MB limit. Did you zip it? Here's the error and velocity plots. The max error is about 100 counts or 0.005 inches. Is that acceptable? I found a link in a forum post to 4.35f and downloaded and installed that but after running a ...
by TomKerekes
Sun Aug 07, 2022 9:34 pm
Forum: Tuning Servos
Topic: Fadal Overhaul
Replies: 1
Views: 26

Re: Fadal Overhaul

Hi Greg, Thanks for starting a Thread. I don't understand in the linear graph, last attachmet, the graph doesn't seem to "zoom to fit". I'm not quite sure what graph you are referring to or what you mean. But the Plots capture a maximum of 40,000 data points. At 90us sampling that comes out to about...
by TomKerekes
Fri Aug 05, 2022 9:24 pm
Forum: Configuration Issues
Topic: Stuck at the start on servo tuning w/ Youtube video.
Replies: 17
Views: 858

Re: Stuck at the start on servo tuning w/ Youtube video.

Hi Dave, You forgot to plot error or post the raw data as we requested. With this we can't see the errors or performance. You didn't plot Velocity or use TripsWPF to check what you are testing. The Velocity is only 171000 not 700000. The Acceleration is only 600000 not 2000000. What is your KMotionC...
by TomKerekes
Tue Aug 02, 2022 7:02 pm
Forum: Configuration Issues
Topic: Stuck at the start on servo tuning w/ Youtube video.
Replies: 17
Views: 858

Re: Stuck at the start on servo tuning w/ Youtube video.

Hi Dave, I think your system is borderline unstable. At certain speeds and positions the friction and structural resonances are such to go unstable. Did you tune the system? Did you test at different speeds and positions? Do you gave good margins in your gains? When Jogging the Jog Velocity is set b...
by TomKerekes
Tue Aug 02, 2022 6:44 pm
Forum: Bug Reports
Topic: Deviation observed on 3+2 axis CNC milling setup.
Replies: 20
Views: 1186

Re: Deviation observed on 3+2 axis CNC milling setup.

Hi Wilson, That all sounds reasonable. But still quite aggressive on Velocity, Acceleration, and Jerk. 1e7 is over 1/2G acceleration. Most CNCs operate at about 10% of that. If you can't achieve your accuracy goals you may want to decrease those. 5. Reduced the P gain till the servo would freeze and...
by TomKerekes
Sun Jul 31, 2022 11:11 pm
Forum: User PC Applications and Libraries .Net
Topic: Motor movement during reset of axes
Replies: 11
Views: 255

Re: Motor movement during reset of axes

Could you just move in the negative direction by an amount larger than the backlash to your position so the backlash would be zero before you zero? Then the backlash would always be zero and not need to be set. Otherwise there is a global variable: double ActualStepPos[NSTEPDIR]; I believe with outp...
by TomKerekes
Sun Jul 31, 2022 4:01 pm
Forum: KMotionCNC, G Code Files, Offsets, Post Process
Topic: I word with no g2 or g3
Replies: 5
Views: 212

Re: I word with no g2 or g3

Hi Tony,

Are you running Version 4.35f ?
by TomKerekes
Sun Jul 31, 2022 3:58 pm
Forum: User PC Applications and Libraries .Net
Topic: Motor movement during reset of axes
Replies: 11
Views: 255

Re: Motor movement during reset of axes

Hi Sam, That makes sense. Basically the motor position will be the Destination + Backlash. The ZeroAxis command zeros the Destination and the Backlash. Setting the Backlash to some value will cause a burst of step pulses to move the Backlash amount. Maybe you could explain what you are trying to acc...
by TomKerekes
Fri Jul 29, 2022 4:21 pm
Forum: User PC Applications and Libraries .Net
Topic: Detect GCode is running?
Replies: 1
Views: 49

Re: Detect GCode is running?

Hi Sam,

No there isn't. The Interpreter will be running from the time you call it to Execute until you receive the callback that it has completed (normally or for any reason).
by TomKerekes
Fri Jul 29, 2022 4:04 pm
Forum: User PC Applications and Libraries .Net
Topic: Motor movement during reset of axes
Replies: 11
Views: 255

Re: Motor movement during reset of axes

Hi Sam, I'd prefer that you perform the tests and explain the results clearly rather than having to watch a video. It you show me things happening with your App that I don't have that won't help me much to duplicate it to be able to track it down. But you might upload the video to YouTube and then p...