X axis motor barely turns on its own  

RE:

Here's a video of the phenomenon.

RE: X axis motor barely turns on its own

Hi 

the belt looks loose at the beginning of that clip... ant the motor is trembling, instead of moving
if you take out the three  motor retaining screws. then slip the belt off the toothed wheel, you can try moving just the motor toothed wheel, if it still trembles, the chances are that one of the motor wires is not connected, or the driver may be faulty

Male sure the poser is off before working on the controller. 
make sure that all of the pins on the X axis Motor plug are properly inserted and that the plug is correctly inserted into the socket
if the problem persists and if you have a multimeter,  turn off the power, unplug the motor connector and check for continuity between the wires on the motor plug,
there are 4 wires  there should be continuity between the red and blue wires, and continuity between the green and black wires but the green and black wires must not have continuity with the red and blue wires

 Regards Joan

RE: X axis motor barely turns on its own

Even without the belt, it still seems to do nothing but tremble. 

I had a look inside, and it looked alright to me. Unfortunately, I do not own a multimeter, but I can try asking friends.

RE: X axis motor barely turns on its own

try swapping the X and Y motor, then try moving axis again, (With the printer switched off...)
if the X motor on the y axis driver, works OK, and the Y Motor on the X axis trembles, then that would point to an X motor  driver fault. 
if the X motor trembles on both drivers and the Y motor works on both drivers, then that points to a faulty X motor

regards Joan

RE:

I'd get on the chat with Prusa support. Go to their web site, login and look for the chat button. That's why you paid the big bucks for a Prusa printer. For a new machine I would always get on the chat first--to establish any warranty claims— even though I'm pretty sure I could fix things myself. 

Given the sorry state of the belt in the video I suspect there's more going on. But the Prusa folks can talk you through dis- and re-assembling the x-axis. 

RE: X axis motor barely turns on its own

Thanks! It looks like with the cables swapped, the X motor still behaves the same.

FoxRun3D, good idea. I'll reach out to them!

RE: X axis motor barely turns on its own

Actually, looking at the video again zoomed in my money is on the grub screws not being properly installed. Looks like the shaft is rotating but the pulley is not moving with it. See https://help.prusa3d.com/guide/3-x-axis-x-carriage-assembly_429986#430910

RE: X axis motor barely turns on its own

Just tightened the grub screws again. No luck there yet. 

RE: X axis motor barely turns on its own

I talked to support and they're sending a new motor my way. I linked them this thread and it was a lot of help. Thanks z ton!

RE: X axis motor barely turns on its own

Good luck. 

Joan

RE: X axis motor barely turns on its own

Keep us posted how it goes with the new motor.

RE: X axis motor barely turns on its own

It arrived, and the printer's up and running. Hooray!