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tutur19
(@tutur19)
Active Member
extruder motor work / click / not turn some time

Hi ,
sorry for my english, I'm french user 🙂
I have something strange on my MMU2 MK2. When I want print big file, my extruder block, sometime first and totaly after. The file i want print is very simple just un tub.. For example :

I update firmware, i check tension of extruder screw like prusa video . When I test , sometime the extrud click (like he was block, exept he has no filament) or not turn (but i have the little noise like if turn) even it's empty. When i push filament manually no problem

Sometime this appening : https://drive.google.com/open?id=1dhy8v1AJsrwt0yc1xw1cf8T3kyDitlh9

Edit : I note , on big print it's alway the left side who don't print correctly. I don't unterdstand why ? :/

Any idea ?
Thanks to all

Opublikowany : 23/01/2019 7:35 am
Nikolai
(@nikolai)
Noble Member
Re: extruder motor work / click / not turn some time

Maybe broken cable of the extruder motor? Would also explain why it happens in specific region (high, left side for example) during print.

Often linked posts:
Going small with MMU2
Real Multi Material
My prints on Instagram

Opublikowany : 23/01/2019 8:37 am
tutur19
(@tutur19)
Active Member
Topic starter answered:
Re: extruder motor work / click / not turn some time

Thanks for answer.
Yes it's only on left side, you can see on picture :

I check the cable but it's normal. I try to switch with X axis and the both work correctly : /

Opublikowany : 23/01/2019 11:54 am
eschlenz
(@eschlenz)
Eminent Member
Re: extruder motor work / click / not turn some time

You said the extruder clicks sometimes, even when there is no filament loaded? That makes me think that you might have some debris interfering with the extruder gears.

Have you opened up the idler door yet to check for any kind of debris? I would do that. Make sure nothing is in there that would rub against the gears, or cause it to click like you described.

Opublikowany : 23/01/2019 5:43 pm
Nikolai
(@nikolai)
Noble Member
Re: extruder motor work / click / not turn some time


I check the cable but it's normal. I try to switch with X axis and the both work correctly : /

How did you checked it? If it's broken inside, it's hard to detect.

Often linked posts:
Going small with MMU2
Real Multi Material
My prints on Instagram

Opublikowany : 23/01/2019 6:34 pm
tutur19
(@tutur19)
Active Member
Topic starter answered:
Re: extruder motor work / click / not turn some time

You perfectly right ! And you give me a idea. The bug appeared this morning , so i try whit LCD Screen to move extruder. He make noise but not turn. So i altern Z Axe up and Extrude fonction (I don't have put filament in extruder) . And after 3 mm on Z Axe, Hourra the extruder work again.
So i think youre agree, that meen it's cable ?

Opublikowany : 24/01/2019 6:52 am
Nikolai
(@nikolai)
Noble Member
Re: extruder motor work / click / not turn some time


So i think youre agree, that meen it's cable ?

Sounds to me. You can contact Prusa live support and try to get a replacement if you're inside a warranty for free. If not, you can try replace the cables by yourself and if that doesn't work get a whole motor replacement.

Often linked posts:
Going small with MMU2
Real Multi Material
My prints on Instagram

Opublikowany : 24/01/2019 6:58 am
tutur19
(@tutur19)
Active Member
Topic starter answered:
Re: extruder motor work / click / not turn some time

Thanks you so much !!
Effectively after 2 unmounting i found exit the screw who take cable on extruder. Not a lot but just enough for touch the metal of frame (on Y home) ..
i sold a new wire and it's work perfect !

Have a nice day !

Opublikowany : 26/01/2019 8:32 pm
Nikolai
(@nikolai)
Noble Member
Re: extruder motor work / click / not turn some time


Thanks you so much !!
Effectively after 2 unmounting i found exit the screw who take cable on extruder. Not a lot but just enough for touch the metal of frame (on Y home) ..
i sold a new wire and it's work perfect !

Have a nice day !

I'm glad you found the issue. Happy printing! 🙂

Often linked posts:
Going small with MMU2
Real Multi Material
My prints on Instagram

Opublikowany : 26/01/2019 8:46 pm
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