10-29-03
Tel conversation with George:
George was measuring the flexure on the xy stage
by attaching the indicator to the George Mount.
He said that he saw anywhere from .004 inch to .006 inch
flexure.
The George Mount, I told him, had undergone simulation
and the max flexures amount to about .002 inch

So, the indications are that it is the xy stage that
is either flexing or not staying in place. 
Is the break strong enough?
He also measured the flexure at the site of the POM.
There he saw flexure of about .013 inch

10-30-03	Thursday
Gather info on large XY Stage we use for Acquisition Cam
P/N XYR-1212-P-5TPI-150SM

P stands for precision
5 TPI stands for 5 Threads per Inch

Need to find out what type of Motor and Brake? is used.
E-mail I prepared for George, but not sent:
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10-30-03
Hi George,

I am pretty sure we are using a brake inside the motors that drive the
large X-Y stage, although, I have been unable to locate the part number
for the Brake. The motors are SmartMotors 2340 (Animatics)

When you have some time at hand....

1) I think we should check the repeatability of the two axis, first in a
position with the Acquisiton box horizontal, then maybe turned over
to a slight angle. For both measurements, X and Y, we should put the indicator
on the George Mount. The X-Y stage is equipped with antibacklash nuts, and one
should be able to come back to the initial settings from either direction. I am also
wondering if the brake will change these departure settings
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01-14-04 Tokunaga to oversee flexure work on Aquisition Camera
We need to test brakes on animatics motors
we need to test if there is backlash in the leadscrew of the large
xy stage
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01-29-04 Meeting Alan, Vern and John
Will get on flexure problem starting third week in Febuary 04
Will ask Doug to spend one day at the summit