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User name X. Zheng
Log entry time 09:35:10 on June10,2007
Entry number 205031
keyword=Spectrometer angle changed to 53.690 degrees
Left HRS is at floor mark 54.0 and vernier -22.6mm, Right HRS is at floor mark 53.5 and vernier -1.2mm. Both have angle=53.690 degrees;
It was a pain to move the right HRS. The spectrometer get stuck every 0.5 degree and each time we have to go in the reverse direction, then go back. THis could either be bogies control problem or something on the floor is blocking the move. I have saved the bogie screen below, cannot really spot anything wrong. The only thing that could be wierd is that the MCO O3 readback is always 0.03 Amp.
Also, between 54.5 and 53.5 (the final position) we tried going with 700 rpm instead of 1000rpm and it went 1 degree without being stuck. Don't know if the lower speed is related but one could try it next time.
FIGURE 1