Hey everyone! I’m just now getting started with TMT and am very new to 3d printing in general. I’ve read through many of the discussions here, which have been so helpful, but am not sure if the tires I’m currently printing are okay. There is stringing between the two I’m testing with. I am using the generic TPU profile in Bambu Studio on an A1. I did see something @Little_Charlie posted about a TPU profile on Makerworld. Would that reduce/eliminate the stringing I’m seeing here? Thank you all!
Stringing usually isn’t a problem, just give them a quick once over with a heat gun or torch to remove the strings and it should be all good.
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Thank you!
I also should have asked, is 15% infill the typical setting for tires? I believe I’ve seen some people using 15 and others saying it’s too stiff.
15% for tires using 95A TPU is correct. I would definitely try out that TPU profile on Makerworld. It improved my results a lot over the default setting. Then I did a little tweaking and I am very happy with it.
https://makerworld.com/en/models/1045337-the-perfect-tpu-profile#profileId-1031040
I’ll give that profile a try. Thanks so much!
that profile helped me loads on makerworld ! i changed back from hardened nozzle to stainless which help tons, also you can use chatgpt take a photo of your part and layer lines and it will walk you different options to change and tweak
The second profile on the makerworld “perfect tpu” page labeled "Better bridges, optimized retraction" is another level up IMO, too. I’ve been using that with great success!
I need to try that one. Do you mind sharing the direct link to it here for future search references.
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It looks like the A1 comes with stainless nozzle, so that’s what I’m currently using. Do you use the hardened nozzle for PETG and stainless for TPU (95A & Air)?
Also, are you all using a cold plate for TPU? No glue?
TPU strings when it’s not dry.
Ok. I’ll dry it more before I print more tires.
I can’t get much better results than what you’re seeing there. I use the setting that prints one complete object at a time before moving on to the next one. Not sure what it’s called in Bambu Studio. This eliminates travels between objects, and eliminates stringing.
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I remember seeing that setting, but wasn’t sure how it would work. I just enabled it for my next test I’ll run overnight (Bambu Studio: Others-Special mode-Print sequence). It actually reduced the print time from the previous slice. If it works, I might keep this setting for tires (and other prints if feasible). If it fails mid-print, at least it wouldn’t be all objects. I’ll report back. Thanks!
I’m currently testing the headrest cushion using TPU Air. Strings, oh the strings 
I applaud you for giving it a shot. I’ve had a roll of Siraya for about 3 months and have yet to test it out… you inspire me! Maybe I’ll play with it once this chair is complete.
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Print by object
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I haven’t put heat to it yet. Just pulled the strings. After I clean it up, I might print some TPU 95A cushions to see how much different they are.
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Just an update after all of the helpful suggestions. On my A1, I’m currently printing two tires at a time, print by object, using the TPU profile linked here. I have a new roll of SUNLU TPU 95A - dried for 12 hours at 65. It’s slow, but the results are great. I have access to another printer that I’m printing PETG on for the time being, since the tires are taking a long time this way. I’m sure I’ll keep working to get more tires on a plate and faster print speeds, but this is working well for my first build. Thank you all so much for the help!
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what infill % is that? looks more than 15%.
I did my tires at 15% and I’m not sure its going to work. The middle section of the tire segment is squishy but the ends are pretty rigid which results in a pretty bumpy ride
@MakeGood_Noam any suggestions?