Trouble with actuating the extruder motor during prints

[trail palm]

I've been working on a 2.4 our club inherited and it has been struggling to actuate the extruder motor. We ended up replacing the wires connecting it to the big tree tech octopus and that fixed our issues with the motor just vibrating when we sent it extrude commands. But when we went to run an actual print the motor stopped working. Checking the octopus we noticed that all the heatsyncs on the motor driver were all super hot (im guessing around 100c). At the beginning of the print we were given the error message "currently throttled" could this have something to do with the issue? I'm not really sure how to further diagnose the problem so any further guidance would be great, thanks!

[valid plover]

Noob here, lit just joined fifteen minutes ago. I'd be concerned about a dying stepper or bad heat creep that's killing it. Maybe said heat creep is what messed up the previous cables.

[trail palm]

we' re fairly confident its not the stepper since its brand new and we've replaced it serveral times, but maybe heatcreep could be causing the hotend to jam, preventing the motor from extruding?

although that wouldnt explain the currently throttled error or the fact that the motor drivers became insanly hot

[valid plover]

I misunderstood... you said the motor drivers...

Rq make sure you ahve the right cables because some steppers have the middle two pins swapped. That is what happenend to me wit ha Replicator 2 repair.

[gilded parcel]

the "throttled" error is about the pi. So yes, you should probably fix it, but it's not directly related to your current issue. There are two throttling errors the pi will raise: one regarding voltage drop, and one regarding overheating.

although, between the octopus drivers being crazy hot, and the pi being crazy hot.... do you have working cooling under the printer? if not, you should.

there's also the question of how each driver is configured. What are the various run_current settings set to? (might be easier just to post your config)

[gilded parcel]

in my experience, if the extruder runs properly outside of prints, but acts useless during the actual print, that's less likely to be anything complicated like heat creep, and more likely to be just a slicer config issue. Start code and slicer not agreeing on whether you're working in relative extrusion or absolute extrusion, that kind of thing.

[craggy pendant]

From what I can remember we were running it at .4 initial current and .3 continuous?

[gilded parcel]

And that's getting the driver that hot?

That definitely seems odd

[craggy pendant]

Maybe there’s something screwed with the power distribution? And the motor drivers are receiving more than the .4 and .3 it wants to send to the extruder motor?

[gilded parcel]

it's the stepper driver itself doing the regulation, so no, I wouldn't think so.

post your config though

[trail palm]

Is this the correct file you're looking for?

[gilded parcel]

I mean, it would be, except somebody has sliced it up into a bunch of separate include files...

[craggy pendant]

Alr we’ll figure out how to extract as one file

Is there a chance that it isn’t slicer issue and more so one with our board

Since we’ve had the printer running previously and haven’t altered the slicer profiles or start gcode

[gilded parcel]

Easiest way to do that is the klipper log

Or Mainsail has a download all as zip thing too, I think

[gilded parcel]

I mean can't rule it out. Or with all the heat stuff, we're chasing red herrings, and you actually just have a loose grub screw or something...

[craggy pendant]

I’ll try to get you the whole klipper log tomorrow as soon as possible

Tysm for helping us through all of this