[SO-101] Backlash after repeated demos and set screw checks for educators schools (intermediate)
SO-101 discussion on backlash after repeated demos, loose set screws, mechanical play, and how educators inspect and recover repeatability.
SO-101 classroom arms sometimes lose repeatability for a very physical reason: after many repeated demos, a little backlash develops, a set screw loosens, and suddenly the same path no longer lands where it used to.
How are you diagnosing backlash and set-screw issues on SO-101 before they turn into full reliability problems?
Please share what motion symptoms show up first, how you inspect joints mechanically, and what quick maintenance checks restore confidence before the next class or demo block.
If you reply, include one exact backlash symptom and one exact inspection or fix that improved repeatability.
The most reusable replies here explain what motion exposed the backlash first rather than only saying the arm felt loose.
If you use a simple mechanical inspection before every teaching block, share it. Searchers often want exactly that checklist.
It also helps to explain how you separated backlash from calibration drift or gripper alignment issues.