Printer down!
Last night, in the middle of a print, my Prusa MK3S+ extruder motor stopped dead. No motion at all. When I tried to move the motor from the menus, it didn't work, and weirdly the firmware actually rebooted once or twice.
Today, I disassembled the printer (not very methodically, sadly) and found that the motor was unable to turn with manual force. This is even when it is attached to absolutely nothing.
I applied an unreasonable amount of torque and the motor spindle "popped" free and started turning again, in the normal hurky-jurky stepper motor way.
The motor is nominally working again (I attached it to the Y-axis driver and confirmed that it works as expected), but since there was no visible sign of a jam or any way to know when
the problem will happen again, I'm just gonna go ahead and replace it with a brand new one.
If your extruder stops working, common problems seem to be loose connections or worn wires first, and a bad driver on the main board second. I haven't seen anybody mentioning a physically frozen motor, so I thought I'd just put it out there so the next person know they're not alone.
#3dprinting @3dprinting #prusa