I took the advice i got here concerning simply buying another matching stepper motor for my dual extruder build and here is video of my shortlived victory. my 1st working extruder design…printing my second extruder! yaaaaay!
I say shortlived, because after i finshed printing-what has to be one of the cleanest prints ive had in a long time, owing to some careful calibration-the heat from the servo its mounted to, softened it just enough to lose grip on the filament and stop pushing it into the hotend
so i guess i will be using the second extruder to reprint both extruders in nylon
Nylon actually has a lower softening point than PLA! 47C for some formulations; it will deform permanently, and though you may not notice it, it will give you a bunch of headaches. ABS is suggested for stuff like this, or at least put some fans on the motors, etc (Nema17 fans match up with 40mm 12v fans, IIRC)
hmmm…even taulman bridge? i deprecated ABS a long time ago…hmmmm…although i do thing i have some carbonfiber filament laying around and i think it is ABS based so maybe i will give it a try as well as possibly designing some fan mounts. thanks!
@Onyx_Ashanti : http://taulman3d.com/bridge-nylon.html – Tg of 52C. While it won’t flow through a nozzle very well at that temperature, it will deform enough for things like idler pulleys on extruder motors to deflect permanently, causing filament slippage, etc.
hmmm…i think i can bulk up the part that is deforming. its the bottom lip that the spring bolt is attached to. no harm in trying since its sucha tiny piece anyway
i added a fan specifically to keep the PLA cool. the the driver is not hot and the stepper seems more than happy to be running at this temp (so far). i forgot to mention that it came with a heatsink and a fan attached when i bought it but decided that i would build my own system from the individual parts. from what ive been reading the last couple of hours, these small cheap steppers run hot.
