So frustrating. 😠 Had 4 #3dprint for a new #chrumm #keyboard FAIL after hours of printing at similar 95% point.
On 2 printers ( #prusa MK4 and #BambuLab A1mini) with 2 PETG brands.
Parts pop off, loose adhesion. Spaghetti follows. 😩
Any tips?
Enclosure?
Things that did not help:
- thorough plate cleaning
- brim
- raft
- slower printing
- much slower printing
- different infill
- no infill
- hairspray or sugar coat
- higher heatbed temperature
- extra extra supports
- foam-insulation
Thanks to all the great tips I got for PETG:
- print slower
- eliminate drafts / ensure stable temp / use enclosure
- adjust z-hop to normal
- deselect reduce infill retraction.
- high adhesion "cool plate"
- print a single piece at a time
- higher bed temp
- 2-5°C higher nozzle temp when hardened
- elephant ears instead of raft
- non-big nozzle size
Currently re-trying with shore 58D TPU (Extrude Flex Hard) which should not warp. Fingers crossed🤞
no luck 😦☹️😦
- despite following all the good advice (as it applied to TPU)
- despite the fact that TPU should not warp
maybe print even slower? 20h?
or faster? Is it possible to just restrict Bed-Y-axis-Acceleration?
will have to check in RL later.
maybe it's time to go back to resin printing...
post mortem .. learned some stuff
The Extrudr FlexHard is amazingly fun material but might not be ideal for a keyboard though. Likely still a bit too flexible.
The elephant-ears were still sticking full-force to the printbed while the part was not. So now I'm thinking, the extruder caught a sharp corner like a barb and literally ripped the part off the plate. Picture shows bent up barb. GCODE shows head moving towards it.
!! need more z-hop !!
On the upside, my CryoGrip Plate arrived 🙂
Finally..... Success
- PCTG
- SuperTack Build Plate
- extra high bed temperature
- set z-hop to normal
- double z-hop height to 0.8mm
- 50% speed
🎉
xro
phragment