Only moving slave motor on Gantry following mode (Motor[x].ServoCtrl=8)

I operate to set Gantry following mode (Motor[x].ServoCtrl=8)

and, I want to move small distance only slave motor

because gantry tilt.

have you any ideal?

Yes, we do have special control algorithms for Gantry Skew adjustment (in position), and gantry cross coupling (on the fly).

If the motor is a follower, then you should not be trying to move it independently. This is common practice.

Below, is an example code for executing an automatic skew adjustment. Motor #1 is leader, Motor #2 is follower.

If the gantry motors were initially aligned as best as mechanically possible (e.g. at home location). Then by setting up the following (e.g. in a simple PLC) motor #2 will align itself to motor #1 with respect to the original "good" alignment.

kill 1,2
Call Timer(0.050)

Motor[1].Ctrl = Sys.GantryXCtrl
Motor[1].ExtraMotors = 1

Motor[2].ServoCtrl = 8
Motor[2].CmdMotor = 1
Motor[2].GantrySlewRate=10000

Call Timer(0.050)
jog/1,2