Monarch MDT-24 Retrofit (Sharp SV-2412 w/ Fanuc 0i-MC)

Have you read any of the tuning tutorials?

Are you using Halscope to look at the velocity feedback, velocity command, and following error?

What do you have the min and max following error set to? Set them to an inch or more so you can see what is happening before a following error alarm is set.

A couple of notes here:

Analog input wiring is fine (7I48 AOUT to ANALOG+ 7I48 GND to ANALOG- )

I would set FF1 to 0 to start or 1/(IPS_at_1V) if you know the axis velocity at 1V input
( 1 is likely way too high )

As Todd said, set the Ferror limits (both ferror and min-ferror) to 1 inch or so, so you can see what's happening

D is typically not required on a velocity mode servo, these are tuned chiefly with FF1 and P

Here's a link to a basic velocity mode tuning tutorial:

gnipsel.com/linuxcnc/tuning/servo.html

Ferror is 0.5 and 0.05. I will increase those higher and then play with FF1. Technically based on that formula FF1 should be around 0.012. I will play around the LinuxCNC tuning today to see! Thank you both!

Well the tuning did the trick. However the numbers are much higher than I was expecting.
I have ended up with the following:

• X: P-8000, I-2, D-25
• Y: P-8000, I-2, D-25
• Z: P-10000, I-2, D-30

Now this is all with FF at zero. I can't see any difference with the FF changed. What am I supposed to be monitoring?

Teaser video with the LinuxCNC logo!
Maximum speed is currently set at 300IPM!

LinuxCNC Logo Cut

OK, those numbers indicate that your drives are not running in velocity mode but rather torque mode...