Open leginonbot opened 5 months ago
Original Redmine Comment Author Name: Anchi Cheng (@anchi2c) Original Date: 2017-04-13T20:28:59Z
Got a chance to try this and concludes that Krios/Arctica/Tecnai all behave a bit differently due to weight distribution and goniometer design.
On Krios, a permanent delta 3 degree of backlash correction works the best. On Arctica/Tecnai/Talos, the swing of the gear alone can be used as the correction, although I suspect that Tecnai/Talos need a bit different scheme from Arctica because of the weight difference of side entry stage and Autoloader stage.
I will write code to separate the two cases.
Original Redmine Comment Author Name: Alex Noble (@alexjnoble) Original Date: 2017-04-13T21:53:53Z
Hi Gabe,
I also see a greater error in alternating collection compared to sequential on all of our Krioses. I didn't realize that this was a goniometer-based issue, as Anchi pointed out.
Anchi, I'll be able to test out the code when you're ready.
-Alex
Original Redmine Comment Author Name: Anchi Cheng (@anchi2c) Original Date: 2017-05-04T03:17:57Z
I committed the first version of the change. Alex and I tested it out last week but it did not improve alternate mode accuracy. Will need to refine.
Original Redmine Comment Author Name: Alex Noble (@alexjnoble) Original Date: 2017-05-04T15:45:54Z
Hi Anchi,
The test was on Krios3, which has an apparent goniometer issue around 20 degrees. The next time I have a bit of time (like a few hours) on krios 1 or 2 I will do a more proper comparison.
Author Name: Anchi Cheng (@anchi2c) Original Redmine Issue: 4898, https://emg.nysbc.org/redmine/issues/4898 Original Date: 2017-04-11 Original Assignee: Anchi Cheng
Reported by Gabe Lander