I had my spool of TPU run out mid print. It paused (ok) and I setup to load a new spool. The problem is- on H2D you need to manually load TPU into the right nozzle. During a pause in a print the printer will only allow a automatic load of the filament and that just doesn’t work. With TPU it seems impossible to load a new spool if you run out. My print failed because it didn’t pull the new filament and printed in air as it ran out. 500g of TPU wasted.
Am I missing something? Actually this has always been an issue with my P1P as well (for any filament). There are times when the printer has an issue, pauses the print, but doesn’t give you enough manual control to fix the problem. Then all you can do it watch it fail.
Bambu can I get manual control during a print pause please? I see my printer suffering and I know how to help. lol
You can click X on the message and then go in to the menu where you can set the nozzle manually to 240 degrees or whatever, then once it’s up to temp you can feed in the TPU and press the down arrow on the extruder to feed it in. After around 7 taps on the down arrow you should start to see the filament come through at which point you can click the home button and then the play button to continue your print.
That’s not true, what makes you say that? Have you actually tried it yourself?
I’ve cleared the message and tried manually changing the nozzles’ temp, it still doesn’t work no matter what. Bambu needs to fix H2D TPU loading mid-print.
Ive done this many times and it works perfectly. You can extrude manually mid print as long as the printing is paused, so loading TPU once it runs out is pretty straight forward.
I use this to make multi color TPU prints, by inserting a pause, loading a different color then resuming print.
I think the difference might be you are actively pausing the printer to change filament. When a filament runs out sometimes the printer doesn’t really understand what happened and it thinks there’s a bigger error and canceling the screen notification is not good enough to take back control. It’s really not just a TPU loading issue… it’s an error in print issue that it doesn’t understand then it gets stupid and you can’t get back enough control to set the nozzle temp or run the extruder. It’s locked out until it’s happy about the error that it has mis identified.
I’m not lying for some weird kick - I’m trying to help you. I print mostly TPU on a few H2D printers and in my experience it’s true because I do it all the time.
Like valkyriesound has mentioned, if it’s not working for you then it’s likely something else afoot, the printer may be in a error state that needs addressing before you can load the TPU. I’ve had this once or twice in the past but don’t remember the specifics around it.
Perhaps you can record a clip on your phone so we can see what’s going on and why your machine won’t allow you to manually feed TPU.
I believe you! I just don’t know why we’re having a different experience. I’m on the latest FW. This time- it did understand that it ran out of filament and I was able to take a video. I’m stuck in a loop- the machine won’t give me any control to heat the nozzle and pull in the new filament.
So the root of you problems and what is happening there is the filament sensor above the extruder is not sensing the filament, hence why its stuck on that screen and not extruding. Its very common with TPU and other flexible filaments.
They have a new routine for when external filament runs out, so you no longer need to manually heat up and extrude. Just hit “retry” on the filament loading and push in the filament by hand, it requires a good amount of pressure with TPU, simply sticking it in there wont work. I just recreated the same scenario on my machine, and it worked perfectly.
So the new routine… Looking at the support docs it says that you want to avoid using the auto loading to avoid clogging. Are the support docs out of date?
So I just need to push the new filament in there better to trigger the sensor? Hmmm… ok I’ll try that (and thanks). Seems like there needs to be a better way from a user UI experience if that’s the case. It should know (per my settings on that nozzle) it’s dealing with TPU and maybe give additional context for reloading.
Thats the solution. The sensor does not trip easily with TPU, the softer the TPU the harder it is to trip it. Just give it a good push and when you feel the extruder grabbing it, you can stop.
Probably. Not sure which wiki page you mean, if you can link it.
I’ve had that exact same issue, it was the one I was thinking about but couldn’t remember. I don’t remember if I fixed it or just cancelled the print as I print small parts so it’s no problem for me to just cancel and restart.
It sounds like the others have covered the most likely issue, if it’s still not working after manually pushing in the new TPU then it could be a bug in their firmware.
But generally yes, what you were doing should work in 99% of cases from my experience.
I just don’t know why we’re having a different experience. I’m on the latest FW. This time- it did understand that it ran out of filament and I was able to take a video. I’m stuck in a loop- the machine won’t give me any control to heat the nozzle and pull in the new filament.