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I would set these ini values and re-try:

DIRSETUP = 10000
DIRHOLD = 10000
STEPLEN = 5000
STEPSPACE = 5000

Are these step/dir servos with encoder feedback to LinuxCNC?

If so it seems there is significant delay from command to motion.
This may well be a drive tuning/setup issue. Maybe drive acceleration
set lower than LinuxCNCs setting or some other filtering or constraints
in the drive.

I would need a bit of hint on my tuning of AC servos + 7i95t, as I cannot decrease those spikes on acceleration and deceleration, doesn't matter if I go higher or lower with FF2. On linear move there is f-error 0.001mm or less. Should I start adjusting parameters on diver?
Also if I "go crazy" with short presses on arrow keys for jog, especially with changing direction, f-error is all the way up to 1mm or more.

Captures below are taken during running some test g-code:
 


 

 

I removed GladeVCP from ini and it boots. The spindle works, but xyz joints are not working. Will not jog. Homing does not fix anything, the values move in LCNC, but no physical machine movement. I get an error for:
cannot jog joint 1 because home_sequence is synchronized (-3)

Joint 0 is X
Joints 1 and 2 are my Y axis that are synced.
Joint 3 is Z