1 Topic by AndersE

  • AndersE
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  • From: Sweden
  • Registered: 2014-07-20
  • Posts: 83

Topic: Filament extruder using BIG motor and VFD

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 smile

2 Reply by elmoret

  • elmoret
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  • Registered: 2012-10-11
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Re: Filament extruder using BIG motor and VFD

Nice! Photos?

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

Filastruder - the robust, inexpensive filament extruder
E3Dv6 All Metal Hotend - the premier 3D printing hotend

3 Reply by wardjr

  • wardjr
  • wardjr
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Re: Filament extruder using BIG motor and VFD

I would also like to see some photos.

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4 Reply by AndersE

  • AndersE
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  • From: Sweden
  • Registered: 2014-07-20
  • Posts: 83

Re: Filament extruder using BIG motor and VFD

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...