Even relatively small PC Blend prints are warping
I am have a very hard time printing PC Blend on a C1L. PLA and PETG prints are generally flawless. But nothing I have tried so far has allowed me to get a usable print in Prusament PC Blend. I am aware that this is a difficult material to use, but I have also read accounts of people having good success with it.
My test print is a 2" x 3" box, shelled to leave 2mm walls and floor. I am printing on the satin sheet that came with the printer. So far I have tried printing with and without glue stick. I have printed using the Prusa standard settings for PC blend, and also modified settings to slow the first layer down to 15mm/s. I have tried brims and skirts.
In spite of all that, every print I have tried results in warping where the corners pull up. The build sheet has been thoroughly cleaned with 90% Isopropyl.
Anybody having success with PC Blend on a C1L? What about other Prusa printers?
Any advice greatly appreciated.
RE:
Any advice greatly appreciated.
I've printed a lot of PC Blend on a Core One. Key to controlling warping is a lot of heat: 55°+ chamber and 115° bed. Also, very sharp corners are more prone to warping so you will need a brim or mouse ears and probably chamfered edges. PC Blend shrinks a lot more than the default Prusa profile (I've measured 0.71%). It also under extrudes so an extrusion multiplier of 108% is needed. Next the print bed. PC has a hard time sticking to PEI plates and when it does stick it will pull the sheet off the bed (for large parts). I've successfully printed long rectangular parts covering the entire bed with minimal warping but had to burn through a lot a filament before I found the right combination.
Here is what I use when printing PC Blend:
- 0.4 Diamondback nozzle
- Garolite G10 surface on a rigid steel plate
- Vision Miner Nano Polymer Adhesive
- 275 Nozzle Temp
- 115 Bed temp
- 55 Chamber temp. I even throw a blanket on the top to get it closer to 60
- Around 27mm^3/s max volumetric speed with HF nozzle and 14mm^3/s with a Diamondback
To successfully print larger parts without warping you need more perimeters and less infill.
RE: Even relatively small PC Blend prints are warping
Also, you need to allow the part to cool close to room temperature before removing it.