Multiple consecutive filament load errors - Not even using MMU3!
I keep getting this on my Mk3.5s with an MMU3:
This happens even with my MMU3 disabled and I have not used it in almost a year (humidity is creating serious issues with trying to thread filaments).
I recently updated my printer firmware to 6.5.3 and had some issues with updating the MMU3, and asked for help here. The issue turned out to be that when I was using PrusaSlicer to update the MMU3, it would only see the MMU3 during the reboot process. I tried a lot of USB cables (that's a known issue!) and PrusaSlicer ONLY saw the MMU3 when it was disabled in the firmware and I enabled it. I had tried resetting the MMU multiple times, but that never worked. (I also had to fight the printer, which kept disabling the MMU3 because the firmware version didn't match - I'm not sure how I was supposed to get compatible version loaded if I couldn't enable it!)
Because of this issue, the MMU3 had been turned on and off multiple times during the process. There was NO filament in it - not from the 5 feed in lines, or on the feed to the print head. No filament, nothing. Nothing for it to load.
I finally got the MMU3 flashed and updated to 6.0.4. Then, since I won't be using it for a while, I disabled it.
And I still keep seeing this continuously on my printer control panel.
The best I can figure out is that the multiple restarts were read by the software as multiple reloads, but nothing was loaded or reloaded.
The QR code takes me to the Prusa 3D site, not to any specific page for help. The url listed in the image does provide information and says that if you get this error to go back to the IR sensor calibration routine. I really don't want to do that. One reason is the time it'll take, another is because the MMU3 has been a nightmare since Day 1, with issues the MMU3. I know a lot of them come down to threading and filament issues due to humidity (never had those with just the print head itself, but ran into them a lot with the MMU3). With that in mind, one reason I don't want to have to recalibrate or adjust anything in the MMU is because I don't want to deal with feeding more filament through it until I get my cabinet set up and can control the humidity for filament storage and printing.
And what surprises me is that the MMU is disabled, and I *still* keep getting this message.
What do I need to do to fix this?
Best Answer by Tango:
I found a fix for this - a simple one, and yet another firmware UI bug. (I'm so frustrated with the UI issues and bugs at this point - they have cost me DAYS in lost productivity time.)
I emailed tech support (after about 6 hours of chat with various conflicting bits of information and answers that did not help).
Right now our house has been invaded by grandchildren who will be here for the Easter weekend. I'll write up what happened and what the bug is when I have time to focus on this, in a few days.
I'm also curious - has anyone reported bugs that actually got fixed in future firmware releases? Because some of the firmware UI issues have me at a point where I'm considering switching to Bambu.
RE: Multiple consecutive filament load errors - Not even using MMU3!
I would send a question or chat with Prusa support. I have never seen that error before.
The other idea is a factory reset. If you don't care about keeping the print hours and similar data, you could reset to factory defaults. You would have to redo your settings and go through the calibration again.
RE: Multiple consecutive filament load errors - Not even using MMU3!
I was thinking that - didn't find much when I searched, but thought I'd ask here, first.
There's a lot of things I don't mind losing - print hours and such, but recalibrating for my print bed sheets is going to be a pain! I'll ask support and see what they say.
RE: Multiple consecutive filament load errors - Not even using MMU3!
This message has nothing to do with MMU3. It says that multiple errors occurred when loading the filament. It could be removed by resetting to factory settings. But you need to look in the printer menu, hardware section. Unfortunately I don't have MK3.5 but for Mk4 it is in hardware section -> Nextruder maintenance when you just have to answer yes to the question asked. And since the FW for MK4 and MK3.5 comes from the same family, try to see if it is not similar.
RE: Multiple consecutive filament load errors - Not even using MMU3!
This message has nothing to do with MMU3. It says that multiple errors occurred when loading the filament.
And yet it links to the MMU page.
It could be removed by resetting to factory settings.
Which means having to redo all my print sheet settings and other settings. So no way to just remove the flag? (Since, if it remains an issue, it'll come up again.)
for Mk4 it is in hardware section -> Nextruder maintenance
Nothing even close to that on the Mk3.5. No hardware, and I haven't seen the term "Nextruder" before, so I'm figuring that's on the Mk4, so it might be a totally different situation with that hardware.
RE: Multiple consecutive filament load errors - Not even using MMU3!
When I look at the menu list of MK3.5 or MK3.5/S here:
https://help.prusa3d.com/cs/article/lcd-menu-mk3-5-s_815309?product=mk3-5
I see those items in the Hardware section, or is the support Prusy talking nonsense? I repeat, I don't have MK3.5, but if you don't have those items mentioned in the menu list, then you have no choice but to reboot to factory settings.
RE: Multiple consecutive filament load errors - Not even using MMU3!
You can also try contacting Prusa support live chat with your problem.
RE: Multiple consecutive filament load errors - Not even using MMU3!
When I look at the menu list of MK3.5 or MK3.5/S here:
https://help.prusa3d.com/cs/article/lcd-menu-mk3-5-s_815309?product=mk3-5
I see those items in the Hardware section, or is the support Prusy talking nonsense? I repeat, I don't have MK3.5, but if you don't have those items mentioned in the menu list, then you have no choice but to reboot to factory settings.
Incorrect. That includes the Nextruder, which I don't have - so no options for it. I can pick which extruder to use - MMU or Stock, but no Nextruder. Someone else mentioned an option that is not in the link you included but that they see. I'm on 6.5.3 firmware, so I'm thinking of just downgrading to 6.4.0 to see if that has something that was eliminated in later versions.
You can also try contacting Prusa support live chat with your problem.
I have, multiple times while the forum was down. I was told firmware version 6.5.3 would not work with the MMU. (There's a chart on one page saying it doesn't.) But the download page says it does. I've had others tell me 6.5.3 does work with the MMU. It's been back and forth and the latest is that I need to do a factor reset - I have to check my notes to remember which one, but at least it won't hose all my data.
I'm thinking of downgrading to 6.4.0 first, to see if that makes a difference.
But, after talking with at least 4 people in Support, I'm still not sure which one is right or which step is best.
RE: Multiple consecutive filament load errors - Not even using MMU3!
I found a fix for this - a simple one, and yet another firmware UI bug. (I'm so frustrated with the UI issues and bugs at this point - they have cost me DAYS in lost productivity time.)
I emailed tech support (after about 6 hours of chat with various conflicting bits of information and answers that did not help).
Right now our house has been invaded by grandchildren who will be here for the Easter weekend. I'll write up what happened and what the bug is when I have time to focus on this, in a few days.
I'm also curious - has anyone reported bugs that actually got fixed in future firmware releases? Because some of the firmware UI issues have me at a point where I'm considering switching to Bambu.
RE: Multiple consecutive filament load errors - Not even using MMU3!
If I recall you need to go to nozzle maintenance and reset the error code from there
Settings> hardware>printhead>nextruder maintenance
RE: Multiple consecutive filament load errors - Not even using MMU3!
If I recall you need to go to nozzle maintenance and reset the error code from there
Settings> hardware>printhead>nextruder maintenance
Check my reply one above yours. I don't have a Nextruder, just the normal Extruder and that option was not showing up, due to a bug.
RE: Multiple consecutive filament load errors - Not even using MMU3!
You might have to pretend you do have an extruder, temporarily, so you can reset the counter. In other words, tell the printer you do have a nextruder, then set it back to normal extruder later.
Best of luck!
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2024 - Prusa MK4S/MMU3
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RE: Multiple consecutive filament load errors - Not even using MMU3!
You might have to pretend you do have an extruder, temporarily, so you can reset the counter. In other words, tell the printer you do have a nextruder, then set it back to normal extruder later.
Best of luck!
I've set my reply about 3 comments above yours as "Best Answer." There was a bug involved.