I've found on all the Bambu printers I've used (A1, P1s and X1C) they all need the retraction settings increased to print TPU cleanly with no stringing.
I have printed some 95A without any adjustment to the retraction settings on my X1C and I didn't get any stringing, then again I suppose different TPU products need different retraction settings but for me the default settings were just fine
i dont own a bambu, but on my printer i found that NO retraction at all gave very good results... does this not apply to bambu? im thinking about getting the p1s combo for printing my tpu stuff
your part is underextruded, might not matter for this application but if you take this profile for critical parts like a lid to seal off liquids, it will just seep through the gaps, happened to me. Increasing walls does not help, i really needed to change flow ratio, temps and especially speeds to get rid of the gaps. It also helps to roll off the filament so the direct drive gear only has to work on extruding and not do double duty by also pulling the filament from the spool. Bambus backside spoolholder has a lot of friction that usually doesn't matter for stiff filaments, but soft TPU really benefits from such strain relief
Best to run TPU directly from an active filament dryer, start with 6 hrs of drying then run. Settings other than standard have less effect on quality, dryness has the most effect.
Happened to me too. I cut a piece of ptfe tube about 1 and a half inches long, sanded the edges of the cut side smooth, and inserted that into the back of the machine after disconnecting the tube feeding from the ams. I then fed my tpu from a very loosely (re-coiled) spool. I also increased the temperature to 5 degrees above the recommended temperature for printing
I've been wondering about how well the X1-Carbon printed TPU. Did you have to lower the print speed or does the slicer do it when you select TPU as the filament?
The slicer lowers the speed by default under Generic TPU, but for Ninja Flex I had to lower it more. It's under the settings for the filament max volumetric speed.
Dry your filament. You don't need to change plate. Pei works best for every type of filament. Get the high flow tpu and print at high speed perfect clean prints every time.
I have used tpu for years and the bed did not matter (glass or Pei as long as it was at the right temperature(80c+) and clean. And all that faffing about to load it was ridiculous.
You can print tpu on the textured plate 😂 just cause it dosnt say it on it, dosnt mean you can’t use it 😂😂😂😂 Literally hundreds of tpu prints on my textured plate!
may i help You? i don't know your filament but with ninjaflex enter the recommended filament temps and modify the Flow ratio to 1.05 in "filament settings". After that go to the "Speed" tab and start with 20mm/s for all the actual print speeds. Acceleration and travel can be faster. if this prints fine then you can always try faster speeds. If your TPU is stringing or bubbling it needs to be dried (this takes hours because you have to dry only at around 80° Celsius) hope this helps
I've found on all the Bambu printers I've used (A1, P1s and X1C) they all need the retraction settings increased to print TPU cleanly with no stringing.
I have printed some 95A without any adjustment to the retraction settings on my X1C and I didn't get any stringing, then again I suppose different TPU products need different retraction settings but for me the default settings were just fine
Interesting. It can depend on what you're printing. I was using Bambu TPU 95a (not high flow) and esun TPU 95a.
i dont own a bambu, but on my printer i found that NO retraction at all gave very good results...
does this not apply to bambu? im thinking about getting the p1s combo for printing my tpu stuff
your part is underextruded, might not matter for this application but if you take this profile for critical parts like a lid to seal off liquids, it will just seep through the gaps, happened to me. Increasing walls does not help, i really needed to change flow ratio, temps and especially speeds to get rid of the gaps. It also helps to roll off the filament so the direct drive gear only has to work on extruding and not do double duty by also pulling the filament from the spool. Bambus backside spoolholder has a lot of friction that usually doesn't matter for stiff filaments, but soft TPU really benefits from such strain relief
an onshape tutorial would be amazing !
I've never had luck using the load and unload options. I just hear the nozzle and use the extruder option to remove and feed it.
Best to run TPU directly from an active filament dryer, start with 6 hrs of drying then run. Settings other than standard have less effect on quality, dryness has the most effect.
Thanks a lot for this!
at ender 3 v1 its one of the easiest filament to print.. so in bambu?
when i load tpu into my p1s it just jams up the extruder and clicks A LOT while trying to pull filament and then just clogs... any tips 0.4mm noz
Happened to me too. I cut a piece of ptfe tube about 1 and a half inches long, sanded the edges of the cut side smooth, and inserted that into the back of the machine after disconnecting the tube feeding from the ams. I then fed my tpu from a very loosely (re-coiled) spool. I also increased the temperature to 5 degrees above the recommended temperature for printing
Nice one, also thought you were going to print the teddy too - that would look great in a nice gold fillament would need a lot of supports though
Just use one of the spare ptfe tubes when usibg the external spool for easier loading.
Good print, what was the wall speed settings.
I've been wondering about how well the X1-Carbon printed TPU. Did you have to lower the print speed or does the slicer do it when you select TPU as the filament?
The slicer lowers the speed by default under Generic TPU, but for Ninja Flex I had to lower it more. It's under the settings for the filament max volumetric speed.
Dry your filament. You don't need to change plate. Pei works best for every type of filament. Get the high flow tpu and print at high speed perfect clean prints every time.
Textured flex plate is the best for tpu.
Just little bit of drying the filament and the nozzle temp and stringing is gone
I have used tpu for years and the bed did not matter (glass or Pei as long as it was at the right temperature(80c+) and clean. And all that faffing about to load it was ridiculous.
can you please do a finesse of TPU setting video yooooo
You can print tpu on the textured plate 😂 just cause it dosnt say it on it, dosnt mean you can’t use it 😂😂😂😂
Literally hundreds of tpu prints on my textured plate!
is very hard to print tpu is 0 this machine no work im test 20 different tpu 95
may i help You? i don't know your filament but with ninjaflex enter the recommended filament temps and modify the Flow ratio to 1.05 in "filament settings". After that go to the "Speed" tab and start with 20mm/s for all the actual print speeds. Acceleration and travel can be faster. if this prints fine then you can always try faster speeds. If your TPU is stringing or bubbling it needs to be dried (this takes hours because you have to dry only at around 80° Celsius) hope this helps