Forum Menu

Index Homing odd offset

More
10 years 11 months ago #64766 by PCW
Replied by PCW on topic Index Homing odd offset
Also if the drives have any input command filtering options enabled they will likely need to be turned off.
Any significant delay from the step command to motion will make closed loop tuning nearly impossible

Please Log in or Create an account to join the conversation.

More
10 years 11 months ago #64770 by OT-CNC
Replied by OT-CNC on topic Index Homing odd offset
I think in ste/dir mode input filtering is always active. I glanced thru their manuals and I didn't see an option on turning it off. :(

www.dmm-tech.com/Dyn3.html

Maybe I should have purchased an analog Mesa board instead???

Please Log in or Create an account to join the conversation.

More
10 years 11 months ago #64780 by andypugh
Replied by andypugh on topic Index Homing odd offset

OT-CNC wrote: Maybe I should have purchased an analog Mesa board instead???


Other options are to get this mode working, go back to step-dir and forget about index-homing, or try to find another way to index-home.

Do the drives have any built-in indexing capability?

Please Log in or Create an account to join the conversation.

More
10 years 11 months ago #64783 by OT-CNC
Replied by OT-CNC on topic Index Homing odd offset
I'm starting to like halscope B)
The encoder signal looks messy
What do you think? The first two are of P0 at 12 ipm, the next are at P50 and the dithering at rest which is around .001" tir.

Please Log in or Create an account to join the conversation.

More
10 years 11 months ago #64804 by andypugh
Replied by andypugh on topic Index Homing odd offset
That seems to suggest that P=50 is much too much.
Try repeating the test at p=0.005, 0.05, 0.5 etc and see at which point the f-error starts to reduce.

Please Log in or Create an account to join the conversation.

More
10 years 11 months ago #64813 by LearningLinuxCNC
Replied by LearningLinuxCNC on topic Index Homing odd offset
You need to add ferror as a trace in halscope. You are tuning to minimize it so you need to see it. If ferror is close to zero all the time then the commanded and actual velocities will match.

Please Log in or Create an account to join the conversation.

Time to create page: 0.217 seconds
Powered by Kunena Forum