Feeding Fiber-Filled Filaments Reliably

Fiber-filled filaments are stiffer and grippier than standard Pro PCTG, so friction in the filament path matters more.

• Shorten PTFE runs and remove tight bends.
• Avoid feeding straight from a dryer with a high-drag outlet.
• Make sure the spool turns freely and feeds smoothly, not in jerks.
• Check extruder gears and tension.
• Keep max volumetric speed at about 6–8 mm³/s on a 0.4 mm nozzle. Larger nozzles may go higher; calibrate to find the limit.
• Use a hardened nozzle, 0.4 mm or larger.

If a spool keeps clogging after these checks, contact us with the spool label so we can check the lot.