User name Darcy, Jason, Piotr, Pete
Log entry time 14:58:37 on June14,2004
Entry number 125729
Followups:
- 125733 06/14/04 15:35 Peter L Good Scanner Plots
- 125821 06/15/04 05:33 Peter L DAQ scan positions and ref. voltages
We took the chance during this morning's beam down period to calibrate the scanners as follows:
run 2118:
start X: 0.00 step size: .25cm, end X 23.50
start Y: 0.00 step size: .5 cm, end Y 47.00
run 2119:
start X: 23.50 step size: .25cm, to X=30
start Y: 47.00 step size: .50cm, to Y=59.5ish
next:(30,58),(30.25,58)...(33,58)
then:(24,48),(28,48),(19,38),(23,38),(14,28),(18,28),(9,18),(13,18),
(4.5,9),(20,9),(15,20) home.
We began to have a problem with the output of the left y axis at the
point (30,58) as you can see from the plot pictured below. The top
plot is the Y position and the bottom one is the reference voltage.
The reference should remain relatively constant but it shifts when
we reached the (30,58) position. We have a few theories that need
to be tested as to why this occured.
The bottom picture is a screen shot for position reference. We
started at (0,0) moved diagonally upward and then stepped down with
the knotches. Next we moved each axis individually and then homed
them at (30,57).
hopefully the pictures I grabbed worked out.
Pete
FIGURE 1
FIGURE 2
