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Filament Jam Detection

Posted: Tue Jul 28, 2020 9:14 am
by KR0N05
On any of your printers, I think it would be trivial to add an encoder onto the bowden tube input (where the filament is located) in order to "count" the forward and backward movement of the filament coming off of the spool. This could also be utilized for a runnout sensor for future iterations, but if the filament is not unwinding after X number of movements calling for plastic feed, it would be safe to assume that a jam has occurred and to pause the print. If your team would like more information as to what I mean by this, please let me know and I can make a diagram.

Re: Filament Jam Detection

Posted: Wed Jul 29, 2020 9:46 am
by EraiseR
This is an interesting idea, I'd support it.

Re: Filament Jam Detection

Posted: Sat Aug 01, 2020 9:48 am
by Markus64

That would be a useful feature for the cloud!

Re: Filament Jam Detection

Posted: Sat Aug 01, 2020 10:53 am
I also wish it was an option to set unload and certain temp if it detect a clog.

So if it detect that the filament is not loading while printing it could move the head to the side and unload filament while set nozzle temp to a value for the filament you are using. So petg it could have a temp around glass temp so it stay soft but not burning. Or have the option to set 0c.
This could be set in the menu on the machine so when you load/unload and choose filament type and temp it could have a clog detection temp and behaviour.

Re: Filament Jam Detection

Posted: Mon Jan 04, 2021 8:41 pm
by 3one5
Missing this function makes professional usage of the printer a real adventure. Mine nearly wreaked havoc yesterday because of a loop wound into the filament (high quality colorfabb PLA!). Then that happened the guiding tube for the filament was pressed through the nut it is supported in in the black frame as far as was possible. Since the tube was rather short then the extruder unit was unable to move any longer.

Thus all motors were stalled in this situation except the table motor. The whole unit squealed! Doesn't the board controlling the motors detect missing steps of the stepper motors (as even the Prusa printer is able to do at a quarter of the Pro 2 price tag)?

As a filament movement sensor a rather low priced optical mouse sensor could be used:
It would also be able to sense a filament runout of course.