Problem raith SNF 2011-03-28 20:52:23: Jerky motor control

James W. Conway jwc at
Tue Mar 29 10:03:07 PDT 2011

Hello All,

Likely this was that the User did not have the Laser Stage turned on and 
was operating the stage in coder mode.   Just switch to laser control 
mode in the Laser Stage Control module.  This is the default mode after 
load lock exchanges but if you save the project when in coder state your 
USER.VDB will overwrite the RAITH.VDB on application launch.

another great FAQ in progress!

I tried to respond to Kevin's phone calls, but was above Santa Cruz and 
not on the cell phone grid again until well after midnight...

Thank you,


On 3/28/2011 8:52 PM, khu834 at wrote:
> Stage movement is not smooth, both with the joystick and software stepping.
> Large backlash movements, stage persistently moves in opposite direction with respect to the joystick.
> Unable to control stage motion accurately.

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