MK3S pauses mid print to unload filament
I am reposting a thread I started a couple days ago. Mods, please be faster approving my posts. I know I'm new, but I'm just looking for help. I'd like to get an answer before the thread dies again.
I have a MK3S that I recently upgraded with the MK3-Mk3S kit. It has a bug where mid-print, it will pause, move the extruder to a corner and run the change filament routine. The printer has a full roll of filament, there is no break in the filament. After I turned off Autoload Filament, the printer developed an additional behavior where it pauses to extrude a small pile of filament in the middle of a print before resuming, like a sick puppy soiling a rug.
I can print with the sensor turned off, but that isn't a solution. I paid for a new sensor and I'd like to work.
Things I have tried to no effect:
- Turned Filament Autoload off
- Gone through the Knowledge Base procedure to disassemble the hot end. The filament door moves freely and there are no obstructions in the path.
- The sensor page correctly changes value when filament is loaded and unloaded.
- Re-flashed firmware to 3.8.1 (current release build)
-Changed filament types
-Turned the filament sensor on and off in firmware
-Unplugged and re-plugged the filament sensor at both ends
-Printed the included batman G-Code successfully (With sensor turned off.) thank you to niloc.
Any and all help is appreciated!
Thank you
RE: MK3S pauses mid print to unload filament
David,
the filament sensor on the mk3S is a little touchy and difficult to fault find, because you only ever see the filament sensor status after the event.
I soldered a 5volt LED between 5 volts and the output pin, which gives me immediate status all of the time
I have left the cover off, so that you can see which pins the 5Volt LED is soldered to
https://www.ebay.co.uk/itm/5-Volt-Green-LED-5mm-no-resistors-needed-Lot-of-10/121573356432?hash=item1c4e563390:g:9o4AAMXQyY1TPwcq
Regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: MK3S pauses mid print to unload filament
was 8 minutes to approve your post and reply to it, having taken time to search out links to LED's fast enough for you?
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: MK3S pauses mid print to unload filament
Some folk print a spacer to go between the filament sensor and the extruder body,
https://www.thingiverse.com/thing:4006603
or
https://www.thingiverse.com/thing:4079248
if you turn the filament sensor off whilst you print these spacers, the extruder should not stop for a poop!
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: MK3S pauses mid print to unload filament
I spent 6 hours waiting for someone to approve a post last time. Forgive my indignation, but that sort of lag has the effect of killing a conversation. How many posts do I need to make before they no longer require approval?
That's a clever solution to being able to see the problem happen in realtime. However, having eliminated most of the mechanical points of failure, I'm left to conclude that either it's a faulty chip, a bad cable, or the PETG I used to print the lever is too glossy. I guess I'll try re-printing the lever.
RE: MK3S pauses mid print to unload filament
It took me 5 minutes this time, including time to look at your post of the 31st March
https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-hardware-firmware-and-software-help/mk3s-pauses-mid-print-to-unload-filament/
where you replied, to the Reply Nilok gave you, within about 47 minutes
you posted 12:08am on31st,
Nilok Posted 12:43 am on 31st,
You replied again at 12:55am on 31st
the Moderators on here are all volunteers, in addition to authorising posts we have to deal with spam posts, so that you don't have to.
It's disappointing to note that our efforts are unsatisfactory. it is currently 00:43 am Uk time.
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK