I’ve been struggling with the 3dhojor brand tpu. I miss my geeetech, but they didn’t have any blue in stock. I printed a external spool mount bearing device to see if that helps and trying again now.
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drying the filament and going to drop volumetric speed down to 3.0 from the default 3.6
Every issue I’ve found with separation has been with the extruder having difficulty feeding the TPU. It needs as free a path as possible.
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Going at 50% speed must have helped? I thought I had a pretty clear path. But I guess I really need to run it with the top off on the X1C.
Guess the TPU assist will help.
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These are screenshots of the TPU profile I use on my P1S, with 0.6mm Nozzle. I use it primarily for straps and cushions, but I have used it for tires in the past (I now use my Prusa MK3 with 0.8mm nozzle for tires). I primarily use Sunlu TPU, but it should work on other brands as well. It is being fed from a cereal box spool holder, without any bearings, to the port in the back of P1S with a pretty old PTFE tube. Try it and see if that helps.
Are you printing the straps with a .6 nozzle?
Yes I do)
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Ok how? Every time I try they come out too thick or with holes in them
With this profile—courtesy of multiple hours of trial and error with the help of Chat GPT. I do get an ugly seam in the middle of some of them, but it can be trimmed with flush cutters to be almost flush with the surface. More importantly, they are just as strong as once printed with 0.4 mm.
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TPU assist module ready to go. Soon as I finish another distant holder for the poly maker box I’m going to do another single tire test. This better work. Or else…im going to be sad
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Few questions -
How long are you drying your TPU? This stuff is super wet. 18 hours at 75c is legit what a lot of it needs IMO.
Which brand/version of TPU are you using for tires?
And have you tried the “perfect TPU” setting from Makerworld?
That cleaned up the print surface for me significantly.
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I need to find the perfect TPU settings.
I dried for 18 hours at 65 and then stored it in the AMS which had 11% humidity on its gauge.
Is it one of these?
https://makerworld.com/en/models/1045337-the-perfect-tpu-profile?from=search#profileId-1031040
https://makerworld.com/en/models/661830-perfect-tpu-print-settings?from=search#profileId-589025
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The TPU assist module is working I think. I ran some PETG before swapping to TPU but I shouldn’t have to cold pull every time really…
I fed TPU in and heated up the nozzle and kept feeding it but nothing was coming out…its always something
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I dont understand how this perfect tpu profile works. I open it through bambu studio and it loads a bunch of PLA filament profiles and the tpu profile doesnt look different
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Open it and save the profile as your own and name it (little disk icon to the right of the profile name)
When you go to print TPU, select your filaments for your device first, and then make sure to load that profile before slicing.
Try a small test object first and make sure it works well for you. The small square in their test file was a good setup for both Bambu 95a HF as well as the Priline 98a for me.
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Alrighty.
My benchy came out pretty decently. Not flawless but good. I don’t think there’s anyway to deal with the start / stop seams but they aren’t too bad. I did a tire and I’m about to go check the printer for the morning
Filament was dried for 10 hours and put into a drybox that is at 9% an has been the entire time. I have a ptfe tube from box to printer
What is your seam position? Mine is set to aligned.
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