Printing with my H2C was nearly perfect till today but now iḿ trying something more complex…
Iḿ designed a ASA part for the outside with a fixed TPU seal on it and run straight in problems.
TPU is BL 95a HF and ASA is generic from 3dJake, i printed both in seperat prints and they work fine. (TPU is right, ASA left.)
Multimaterial is another page…when the switch to the TPU layers happens the printer goes in error because “the Heatbreak temp is to high”. I can skip it but its just a loop were he again flusches the Nozzle, moves to the prime tower and goes back in error. All i got from this was a clogged Poop shoot because the TPU didnt want to fall down
So how do i get this done? Reduce the ASA Temps? (itś 10° more than the TPU while printing)
Can i deactivate this Alarm? (I know its there for a reason…)
Any tips for combining this two materials in the H2C?
There’s a setting in bambustudio (on the actual settings menu) to disable it, but do note that if you’re running the chamber heater for asa, and want to print tpu in the same conditions, there’s high chances of nozzle clogging
Oh man you are really asking for it with all that heat.
ASA turns into a rock when it leaves the nozzle. TPU needs all the fresh air cooling in the world to do the same.
You are going to have a mess on your hands IMO. Pretty sure you will have to slow down your print speed and allow it what cooling the part fan can do at those temps as long a time as possible.
Or I fear you will be printing a blob of mess that hasn’t setup yet for the next layer. I guess it really depends on how big the TPU object and layer time is too at that point.
ASA’s Chamber heat and TPU might get real dicey, although thats not the specific error I was expecting. A heatbrake unable to get to below glass transition [ambient too hot] can’t function as a heatbrake so I get it
PETG and TPU combine very well because of no chamber heat, if your need case is fulfilled with petg.
What firmware are you using? I am currently printing ASA and TPU in the same print on firmware 01.01.05.00 and it works fine. It does give me a warning about the heatbreak temperature, but it allows it to continue printing.
I upgraded to the new firmware last night 01.02.00.00 and everything changed, and it now pauses the print and throws an error. I ended up trying it a few times, and each time I had no choice but to stop the print because of the error loop you mentioned.
If you find a solution using the new firmware please let me know.
Unfortunately, TPU just can’t print well at those temps. That doesn’t mean that it won’t work, just that its likely to be problematic. I haven’t tried it yet, but I assume the best way to fix this problem is to use the appropriate materials together. ABS/ASA and PEBA, or PLA/PETG and TPU. Low temp materials with low temp materials, and high temp materials with a higher temp flexible.
I have printed TPU together with other engineering materials like PA and PPS. Here is a nozzle brush from TPU for AMS with PPS-CF tip for heat resistance. Main thing you have to do besides the already mentioned setting in BS is turn off the chamber heater and turn down the plate temp so the TPU wont fuse to it. For this specific project I used a G10 plate so the PPS would still bond to the plate at 50c, you can also use a strong adhesive like nano polymer on a standard plate. Beam interlocking must be turned on for any materials that dont bond to TPU chemically.
but now iḿ trying something more complex…
