Status description

• Johannes was away 3 weeks.
• Chaz and Hrand tested system with camera to "see" reverse moves.
• On 8/31/15 Hrand, Thomas, Matt, Chaz and Johannes met at synchrotron.
• Chaz showed video evidence of positioner 13 moving in wrong direction.
• Visual observation showed that positioner 13 moves reversely within a large forward move (moves, stalls out, moves back a little, stalls, moves forward until hs)
• Pos. 13 was thus discarded as proof.
• Matt, Mitsuko, Johannes and Thomas observe 60 cycles of back and forth on every other positioners, do not see any reversals.
• Positioner 9 fails while testing. Probing shows that the board does not send correct signals.
• Positioner 9 is plugged into a different output and does not move neither (maybe not connected properly).
• Board error on Pos. 9 to be investigated. Potentially related to blown resistors on neighboring cobra.

Conclusion

• Due to the long time we are already debugging the system, we decided to go back to previous firmware.
• Thomas will compile new version of previous firmware because compiled version was not saved.
• Another possibility is that the positioners are broken from to heavy calibration moves.

-- JohannesGross - 01 Sep 2015