Hi I was already going for balls screws, I've been tinkering around at the robo arm yesterday, figuring out all the modifications needed for loading/unloading wafers from a cassette. I was thinking about using a spring-solenoid[1] as Ferenc suggested, with a digitally controlled current controller, for instance the CN0151 [2]. I could use this solenoid for the grabbing part of the waffer, as shown in the video you've posted earlier, as well for the stage pins to load the wafer off the grabbing arm. It might actually also work for the axis adjustment, without needing all the additional fancy electronics, since we anyway adjust the current over the solenoid based on the laser measurement, so we know better than the controller, where our lense actually is.
Cheers -lev
[1] https://www.aliexpress.com/item/4000128120793.html [2] https://www.analog.com/en/design-center/reference-designs/circuits-from-the-...
On Wednesday, January 26, 2022 4:58:32 AM WET Hagen SANKOWSKI wrote:
Hello List.
Looking around I found this video about "chasing Micrometers with the best ball screws" https://www.youtube.com/watch?v=WoPPwGxgWEY
Well, the use-case for this ball screws are more than the robot arm for loading and unloading the wafers. Thinking twice I imagine ball screws also
- for the x-y table positioning on our stepper
- for the x-y probing/sensing of the die with automatic test equipment
All position problems looking quite similar. It would be nice to have a solution solved once, used many times.
Regard, Hagen. _______________________________________________ Libresilicon-developers mailing list Libresilicon-developers@list.libresilicon.com https://list.libresilicon.com/mailman/listinfo/libresilicon-developers