Hi, I’m having trouble with a print that I’ve moved over from my ender 3 pro to my X1C.
It is made from TPU 95a and has chunky screw threads that keep failing despite the same model printing perfectly on my ender.
I’m using generic TPU profile on bambu slicer but have increased retraction to 1.5mm and reduced printing speed of the relevent angle overhangs to 10mm/s.
Any suggestions on why it’s failing?
It looks like it’s possibly still going too fast to cool those overhang layers where the screw thread is. You can try increasing the fan speed for overhangs and increase the time. The setting is in the filament tab under cooling. Try increasing the max fan speed threshold layer time to 6 or 7s. Make sure the slow printing down for better layer cooling box is ticked. https://wiki.bambulab.com/en/software/bambu-studio/auto-cooling
Thanks. I’ve tried your suggestions but unfortunately it’s still happening. It’s very strange as I’ve never had issues with it on the ender. Could it be a line width issue or filament too hot?
Look at your speed in the top drop down menu and double check that it is the correct 10mm/s speed you have selected.
You can drop the nozzle temp by 5c to 10c it should help on threads or you can also do a custom z layer nozzle temp change @ the base of the threads to the top of the threads.
You can also move the part closer to the aux fan on the left of the built plate and use the aux fan to help with cooling.
Custom z layer nozzle temp change;
Slice the part then move the right slider below your parts threads then right click the (+) on the right side layer bar to add “custom gcode”
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M104 S220
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You can also add it to the gcode in the printer settings / machine G-code / before layer change gcode
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;Nozzle temp sample = 220c when @ 30.00 mm layer height
{if layer_z>=30.00} M104 S220{endif}
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Check out OcraSlicer is has more settings for overhangs like = Make overhangs printable
Slice your part and look at the layer lines and speeds in OcraSlicer with ( make over hangs printable ) you will see the changes on the threads layers.
