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Configure for new USAXS hardware and 20IDB #563
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Edited stages.py: |
Changed slits.py - new motor assignment is that all slits motors (blades, centers and gaps) are on 9idcLAX:m58:c1, Guard slits x and y are on 9idcLAX:m58:c0:m7 and m6. This is simpel PV replacement. |
@prjemian - need solution for monochromator.py, What do we do with this ? I suspect this will break stuff. |
diagnostics.py - changed PVs for 20ID station A and B |
permit.py changed operations_in_9idc to return always true. |
shutters.py |
white_beam_ready_calc.py - changed beamline PVs |
general_terms.py updated PVs to new logic added: ay_in = Component(EpicsSignal, "9idcLAX:ay_in") I think I fixed this, but this is the most likely place of any bugs. |
aps_source.py - changed to 20ID for undulator. |
usaxs_fly_scan.py - |
Plans changes sample_transmission.py - here we need to move horizontally to get diode in the beam (USAXS/SAXS) so changed code as needed... scans.py - changed step scan to move horizontally. Line 324/325 changed to DX0 and AX0. More similar blocks. uascan.py - changed to move in x direction. |
reset_USAXS.py - changed to move in x direction |
TODO: BS cannot open B shutter. Something is wrong. |
@jilavsky emailed:
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TODO: AR stage seems to sometimes need more time to reach position. DUmbed down in epics for now and it seems to work, but we may need to add more retries for this stege? |
AR stage still having issues. Mid way scanning I get following error:
to the best of my abilities this looks like ar stage is not reaching its position in time allocated. I can try to retune the stage, but it would be nice if this specific stage gave it bit more time. I have relaxed the conditions in spec - set number of retries to 10 (was lower to speed up spec scanning) and increased Retry deadband. We will see if it helps. |
May not be problem. I retuned the stage and seems to be working now. |
Still issue, had to dumb down motor to 2e-5 deg Retry deadband and 10 retires. routinely have 3 retries, sometimes more. |
Servo motor?
…On Wed, Oct 19, 2022, 8:43 PM Jan Ilavsky ***@***.***> wrote:
Still issue, had to dumb down motor to 2e-5 deg Retry deadband and 10
retires. routinely have 3 retries, sometimes more.
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PID loop driven motors (all of them) against encoder. Encoder resolution is officially 3e-7 degrees for rotational stages, official minimum step size is 0.03 arc seconds (8e-6 degrees). Sometimes may take longer time to settle at position. This is expected (and not problem when flyscanning)... Tuning helped, but seems like larger steps cause stage to overshoot. I might be able to improve optimization more. |
We're not done with this issue, so re-open it. |
We need to reconfigure PVs for new Aerotech drivers and 20IDB PSS system. There is little to bet from obsolete EPS system. Lots of smarts need to be disabled.
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