H2S constantly getting extruder motor overload error messages stopping the print. Took off the AMS and printed directly from the roll. New nozzle, extrudes fine manually. Any ideas?
Make sure you’re doing the flow calibration for that filament before the print. if not try raising the print temperature or lowering volumetric flow on the profile for that filament. If your temperature sensor for that print head is going out it may be off a few degrees and you need to raise temp to adjust for it.
So if I understand you correctly the issue still occurs when printing from an external spool?
If so, are you using a 3KG spool? Those spools are known to cause the issue.
Another thing to check might be your filament path. A too-short bend increases drag and can trigger the error also.
A 0.2mm nozzle is also quite known for causing those errors. Testing with 0.4mm could help too.
Just some tips on top of @MotoGP11991 his advice.
I switched to an external spool to rule out the amss being the issue. It’s a standard 1 kg spool, it’s also a standard 4 nozzle. I checked the filament path and It seems fine. I can push the filament through smoothly and actually early on after I bought this machine. Replaced the tube between the buffer and the tool head due to the factory one being a little bit short and causing problems when I was printing in the far corner. Printer was working fine for hundreds of hours before this started happening and like I said I put a new nozzle on it as well. I have six of these machines in the exact same configuration and this is the only one that does it
You could consider bypassing the buffer by using the TPU port at the rear.
This to exclude the buffer from the equation.
If it still persists, you might have some issue with the extruder itself. Maybe some debris is adding some resistance to the extruder motor causing this to occur.
Removing the extruder gear (check for drag marks) and checking if the servo motor turns smoothly by hand (when powered off) is a good check.
The overload is measured by the servo motor, so if all is clean and running smoothly, it might be the servo motor itself.
If above doesn’t help a support ticket would be my next step.
Okay I will give that a try. If I heat up the nozzle and manually extrude it, it seems to work fine. I start a print and anywhere between 15-30 minutes. It’s unpredictable. It will just get the extra motor overload error
You say it started after you installed a new nozzle. Could there be a manufacturing defect in the nozzle? I think I would contact Bambulab.
I’ve had this lately with parts, one time the part was lifting ever so slightly from the bed i am assuming blocking the nozzle which caused that fault code.
Another time, the PTFE pipe was too short inside the printer from toolhead to buffer and kept appearing when printing in one particular corner as the pipe was at its max travel/stretch. Lengthening this resolved that issue.
Yeah I had a problem with the pfte tube at the beginning when I first got the unit and put a longer one in and it worked great for hundreds of hours after that
No, I installed the new nozzle after it started, check if the nozzle was causing the problem
Im having the same issue. Im assuming I can take the front cover off and be able to unscrew the front of extruder, and check the gears?
I finally replaced the new nozzle with another new nozzle and that fixed the problem. The first new nozzle was a knock off brand from Amazon, so only genuine Bambu from now on
Good to hear you found the issue!
Im am new and my H2s is saying the same. I also change hot ends. I using Bambu. 04.
Is thier a way to access the gears without tearing down the machine?
Thank you in advance
Bill
Mine just ended up being the nozzle, so I am not sure