Problem zygo 2003-09-11 02:58:31: zygo- focus w/ joystick only works one direction

ericp at ericp at
Thu Sep 11 02:58:32 PDT 2003

I am able to change focus only in one direction with 
the joystick, not in the other direction.  I was able to 
get the scan just fine by carefully focusing with the 
big "tension" knob, but fine focus is difficult without the 
joystick.  (You can focus coarsely in the other direction
and sneak up on the final focus with the one working 
direction).  I was not at end-of-travel for the motor. 

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