Notifications
Clear all

Manually Moving Bed Issue  

  RSS
Sayum
(@sayum)
Active Member
Manually Moving Bed Issue

I just noticed something on my mini, which i'm not sure is a known issue or not but figured it was worth highlighting. If you manually move the bed,  it causes the backlight on the screen to illuminate. This seems like a potential problem to me, albeit very niche. Shouldnt there be some reverse polarity protection on the stepper drivers? to not induce a voltage on the power rails?

Thoughts?

This topic was modified 1 year ago by Sayum
Posted : 19/04/2021 10:25 am
fuchsr
(@fuchsr)
Famed Member
RE: Manually Moving Bed Issue

It's normal behavior, don't worry.

Posted : 19/04/2021 10:36 am
Fayoh
(@fayoh)
Eminent Member
RE: Manually Moving Bed Issue

Manually rotating any electric motor will cause it to act like a generator. So you backfeed the electronics from the motor instead of from the power supply.I

In practice this has not been found to cause any problems. There's some video on youtube (I mean, of course there is. How could it not be 😅) Where someone really tries to force the motor to induce some kind of fault in the electronics, but nothing happened.

Posted : 19/04/2021 11:10 am
ToddG liked
Share: