Page History

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XRT Mirrors M1, M2 and  M3 are now connected to the PMPS arbiter and coating protection is now active.

XRT M1 (MR1L2) Upgrade

The goal was to get the old Elmo drives out and install a new Beckhoff din rail drive panel. These panels drive 6 axis, 6 absolute encoders, and interface with an E-621 Piezo Controller. Also, the rail was supplied with a new 24/48 volt din rail power supply that had to be racked and wired, so even the wire job was considerable; shout out to Du, Danh  who did some fine electrical work. On top of these tasks we had to run the software for MR1L2 on a PLC running software for 2 other flat mirrors in the XRT running older Elmo drive software. Other tasks included getting a new IOC spun up, a new control screen, and re pointing older screens to use the updated MR1L2 screens.

The wiring job took two days, so we stayed late on the second day to get the rail powered up. The PDU was reading negative voltage, shout out to Sameen Yunus  for not letting me blow the panel up. We flipped the PDU wires, got positive voltage; got the rail powered on. The Beckhoff 5041s were throwing some error lights and complaining about absolute positions being off.

As Day 3 started, we had a full controls day ahead of us. As I walked in that morning I discussed the encoder errors with Jackson R Sheppard and it was decided to swap the cables. The encoders were a bit funny, we swapped 1 encoder cable out with another that was properly shielded/grounded, and 5 of the encoder errors went away! The emergency STO was checked, and small mechatronics movements began. All axes were moving! except the pitch =(  Alex Wallace Margaret Ghaly , led the charge and began digging relentlessly into the heart of the E-621 serial commands. Ultimately, it was decided that the E-621 controller had left us for a better place. 

Final day! We moved on from the E-621 and implemented the pitch motion directly with the new actuator Hardin, Corey L. had installed. He was excited to tell us all about the new specs the actuator had, and was hopeful that the actuator was such a high performer that we wouldn't need the E-621. With the IOC spun up by Zachary L Lentz in mere 15 min and Margaret Ghaly checking out M2, M3 I was able to focus on the final full movements of every axis on MR1L2. The Y axis didn't like moving at 200 um/s and would error occasionally, but ran without complaints at 100 um/s. Soft limit positions were set close enough to touch each limit switch without having to activate. 

We had about an hour to spare before the XRT was getting scheduled for search. With that Gabriel Castilloand I went and tidied some cables up. Success! 

SP1K1-g_pi Support in the DAQ

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