SoliForum - 3D Printing Community — Filament extruder using BIG motor and VFD

Re: Filament extruder using BIG motor and VFD

null@example.com (AndersE) — Thu, 02 Oct 2014 22:14:26 +0000

Sorry elmoret, i didn't think before posting.

I will post images as soon as i have changed the heater part and built a box for the electronics.
Waiting for some ebay buys...

Re: Filament extruder using BIG motor and VFD

null@example.com (wardjr) — Fri, 26 Sep 2014 02:41:09 +0000

I would also like to see some photos.

Re: Filament extruder using BIG motor and VFD

null@example.com (elmoret) — Thu, 25 Sep 2014 21:39:05 +0000

Nice! Photos?

Moved to projects since this isn't specifically about a Filastruder.

Filament extruder using BIG motor and VFD

null@example.com (AndersE) — Thu, 25 Sep 2014 20:16:17 +0000

I have built my own extruder using a 20mm diameter screw and turning that with
a 1/4hp 220v 3 phase motor (36rpm) controlled by a hitachi VFD (VFD=variable frequency drive)

The VFD is programmable with 100's of parameters some including:
accel/decel start/stop (adjustable times individually)
constant speed depending on torque (measuring powerconsumtion) and adjusting accordingly.
warnings of overload (adjustable range) and if so dropping speed or stop.
speed 0-200hz (50hz is standard in sweden)
etc etc..

It also have a lot of inputs and outputs for switches, potentiometers, computer control,
network connector etc..

I am now also rebuilding my setup for eventually using more than one heater and longer meltzone
( i have to short i think because the pellets does not have enough time to mix fully with masterbatch unless i run really slow), and i want to run much faster extrusion.

I get 2.85mm +-0.03mm variance as of now (vertical) without programming any torque variations on the VFD.

The best part is i got them dirtcheap