Problems with TPU Multiple Tool-change Print
Hi!
I'm using a custom post-processing script to inject multi-color toolchanges for multi-color TPU printing, the script also builds a wipe tower that is visited after every layer. However, the prints from this script have issues with stringing, and some blobbing especially near the seam. I have tried various settings across temperatures, retraction length, and speed, but have not been able to fix these problems. These are my current settings
Settings:
Overture TPU, 235°C, 60% fan 0.5mm retraction at 25mm/s, print speed 20-35 mm/s
Any insight or help would be appreciated!
TPU is touchy - because it can compress the pressures in the extruder need time to even out. Try printing even slower and with more retraction - the filament must be absolutely dry and kept dry during printing.
Cheerio,
RE: Problems with TPU Multiple Tool-change Print
Thanks for the tips. My retraction when tool is disabled is 1.2 and the retraction length is 0.5, should i the retraction for both of these?
Unfortunately there is no single answer. Each TPE is a little different and there can sometimes be variations from batch to batch. Your values are reasonable as a starting point but expect to test and tweak each new batch.
Cheerio,