I’ve been using the NozzleX throughout my printing experience, and am printing multi-hour sized parts (not 60 minute parts). My problem is wading around the nozzle that must be removed before the part is ruined. My goal is to use my Lulzbot to print production parts in PC as I have done in NylonX (perfectly & easily), by simply walking away and removing the part 3-10 hours after starting, without babysitting every 15 minutes removing wads of material from the moving head before it snags-off and ruins the print. As my most recent demonstration indicates; it doesn’t seem to be a matter of material sticking to the nozzle, as much as it being attracted to heat…It appears to be sticking to the heat source, not metal or surface per say.
The many various parts I’ve printed with fiber filled PC are sufficiently stiff, strong and durable for their required operation, and Fiber Filled PC exceeds all other materials I’ve tried including Nylon, PETG, ABS and polymer combinations there of. These PC production parts don’t warp and they weather well. ‘…They require too much labor and attention during the printing process. This is my production issue.’
Here is my current focus, as result of suggestions and experimentation through the course of this forum thread;
If my hunch is correct, one might postulate that a higher extrusion and bed temperature could promote the bead to remain hotter longer and less likely to be pulled back to the heat source before it welds to previous laminates and glasses hard. If anyone has found this to be true using extrusion temps well above 300c on modified Lulzbots or other machines, they might chime in.