Servo Wiring and Tuning detailed How To example Mesa 7i77.

Without seeing what the following error is doing in with a Halscope trace during a move, yes. Without seeing what is actually happening we are only guessing.

Post us a screen shot of the Halscope window showing the joint velocity command, joint velocity feedback and pid error durring a short move (all appropriately scaled so we can see them) and then we can make a good suggestion of what adjustments to make.

(There is a handy screen shot tool in the Accessories menu if you installed using a Linuxcnc iso)

Todd,

I posted a link to a video of my hall scope with the error in the post with my current settings a post back, but I know it's kind of an unconventional way to post a video so I've included it here as well( It won't let me upload directly)

photos.app.goo.gl/eiimAkZXWb9CGVqG6

Hopefully that's viewable for others, I'm not 100% sure it's from my Google drive.

PCW, sorry to bug you again, I have looked and I can't seem to find any info on these drivers to see if they are Velocity or Torque, is there any other way to find out? Probably right in front of me.


I do think I must be doing something wrong, as the changes I make really don't make much difference. Obviously when I change the P to 500 it starts oscillating and the gantry shakes and makes some pretty loud noise, but the difference between 50 and 300 I can't really tell too much. Below 50 for P and I get following errors.
Not sure if I am not looking in the right spot or what?

1. If the drives have the tachometer connections wired, they are in velocity mode
2. Can you post your current hal/ini files

They are always in flux... Here they are currently.

In the file I had
#********************
# Axis X
#********************
[AXIS_0]
P = 40

That was to see how low I could go before it failed. 40 was the answer.
100 runs fine for P, but can go to 300... 400a little odd and 500 no good.

Interesting to see the tuning parameters for the same motors with different drivers and Mach3.


:S