Command SetLogicalScaleOffset :

Since it`s almost impossible to set the offset to a precise value using
the axis devices Calibrate command (because the positioner will
constantly waggle a bit and the current position is used to
calculate the offset) you can use this to set the offset to an absolute value.

SetLogicalScaleOffset Definition
Input Argument	Tango::DEVVAR_LONG64ARRAY	0: Axis number 1: offset value
Output Argument	Tango::DEV_VOID
DisplayLevel	OPERATOR	..
Inherited	false	..
Abstract	false	..
Polling Period	Not polled	..
Command NOT allowed for	FAULT OFF	..