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MS2000 or RM2000 syntax
Format UM [axis]= ### …
Units integer
Remembered Using SS Z
Tiger syntax
Format UM [axis]= ### …
Units integer
Type Axis-Specific
Remembered Using [addr#]SS Z

Specifies the multiplier for most serial commands such as MOVE and WHERE. Default values are 10000 (/mm), setting the default input scaling to 0.1μm/count. The sign of the Units Multiplier can be used to change the relative direction of motion for commanded moves. However, using the CCA Z command is the recommended procedure for changing the stage direction. The Units Multiplier can be saved with the SS Z command.


If there are no errors, a positive reply of :A is returned.

For Clocked Position devices

UM command has no effect if the axis is a Clocked Device like Filter Slider , Objective slider or Objective Turret.

As of Firmware version 9.2l (for MS2000) and 3.18 (for Tiger) , when UM for a Clocked Device is set to “1” , Where command prints the Axis position in MilliMeters instead of Slot Position. Move command continues to work, while Relative move doesn't. This feature is mean for troubleshoot and diagnostic usage only and not meant for regular operation.

commands/um.txt · Last modified: 2019/04/18 23:33 (external edit)