1 Topic by tonycstech

  • tonycstech
  • tonycstech
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  • Registered: 2014-08-02
  • Posts: 315

Topic: Feeder screw question

How far does the feeder screw has to be away from the nozzle base ?
With empty barrel, i adjusted feeder screw position so its about 5-10mm away from the nozzle.
I would push the screw all the way in, then back 5-10mm and tighten the collar.
Is that ok setup ?

I am trying ti figure out why material is flowing rather slowly.
I upgraded to a 16RPM motor and extrusion speed is the same (very very slow)
I cant seem to figure out why it has gotten slow since i extruded last summer.

my thingiverse http://www.thingiverse.com/tonycstech/designs
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2 Reply by genesat1

  • genesat1
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  • Registered: 2015-04-26
  • Posts: 184

Re: Feeder screw question

I personally went with buying a new augur and barrel off Filastruder late last year after one of my experiments reduced output.  It really wasn't that expensive, and side benefit - the new augur now flares out so with the set collar, and thrust bearing it hits against the metal frame and can't push up against the motor.  It also means not having to manually set the collar anymore.

One thing for you to try first though is removing the melt filter if you still have it on - then see if output returns.  The screens won't always look clogged even when they are fully clogged.  Second - are you using a different material than you used to, or have you run a different material through that didn't work out and might still be in there?  If when you change material you just put new pellets in I've found that sometimes the old material actually keeps a lump inside the barrel that spins around as the new material pushes past it (different viscosity) so I like to heat it up, take the nozzle off, put new plastic in, turn the heater off, and run the motor just for a minute or two to have it push that lump out enough that I can grab it with a tool.  This only seems to happen when changing from something more solid to something that turns more soft (the soft material just doesn't have the strength to push out the other material - but just flows around it).