Recently printed a couple of coil spring centering pucks. Unfortunately I don't have a photo, but they don't look too far off from typical pucks, just with a custom geometry that is friendly with the airbags. Since they directly take any sideways force on the spring, they are printed in solid polycarbonate.

Printed a few extra body lift pucks in polycarbonate blend as well. Unlike the crappy JKS ones, they don't squash over time. If I have to print them again I'll use pure PC with carbon fiber.

I have a few underhood brackets printed in pure polycarbonate as well. Blended isn't an option there since the underhood temperatures will soften most everything else.

Pretty much all of my printing I do in either a polycarbonate blend or pure polycarbonate. Pure polycarbonate is much stronger and more heat resistant than the blended stuff, but both are light-years ahead of ASA/ABS/PETG in terms of strength.

I'm using a hot-rodded Prusa MK3S+. I crank the extruder to about 345°C, the bed to about 155°C, and the enclosure to about 85-90°C for polycarbonate printing. All of the extruder parts are pure polycarbonate; the body parts are polycarbonate blend. Had a fun time trying to print everything while the original PETG parts slowly melted down...

The enclosure is double walled plexiglass with a real glass inner liner on the front door. Foam board and foil insulation on the top and bottom. The enclosure heater is a 120 watt PTC heater, which is powerful enough to heat the enclosure to 70°C in less than 10 minutes.

(This photo was taken prior to installation of the polycarbonate parts and enclosure heater.)

Ultimate goal is to build a 350mm^3 Voron V2.4R1 Doomcube. The Prusa enclosure is actually sized to perfectly fit that printer on top.

Coil Spring Centering & Body Lift Pucks

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