1 Topic by tonycstech

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

Topic: Centering feeder screw cheap

I was thinking about centering the feeder screw one way or another without spending too much money but eliminate internal grinding and achieve near perfect alignment.

It would required to get another nozzle that has extrusion hole drilled away from the center (like half way toward the edge) and in the center drill half way into the nozzle.
Then drill exact same diameter hole in the tip of the feeder screw (at its center obviously) making sure its not exiting thru.
Insert steel pin into the feeder screw hole and guide it into the center of the nozzle.

This should totally work and getting it done is pretty eazy too.

Now the question is: Can i buy a 1.75mm nozzle that has a hole drilled away from the center ? I assume Filastruder guys drill it them selves because its not perfectly centered.

I dont want to just go with an end cap from pluming store because they are not solid but have a cup shape inside to save on material. I need the end cap solid.
What size of an end cap do i need, half inch or 3 quarters ?

Thanks !

my thingiverse http://www.thingiverse.com/tonycstech/designs
my 3d models http://www.turbosquid.com/Search/Artists/tonycstech

2 Reply by elmoret

  • elmoret
  • Filastruder
  • Offline
  • Registered: 2012-10-11
  • Posts: 6,048

Re: Centering feeder screw cheap

The auger is tool steel. Drilling it will be extraordinarily difficult. It will be equally difficult to get a hole in the nozzle that is centered relative to the internal cylinder of the barrel (note that this is not necessarily centered relative to the outside diameter, or the threads).

The pin will wear against the brass. This will dump debris into your filament. If you still feel inclined to try, solid undrilled nozzles are available in the Filastruder store. They are 1/2" NPT thread.

The correct answer is a melt filter. This is the last time I'll comment on the issue.

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

3 Reply by wardjr

  • wardjr
  • wardjr
  • Moderator
  • Offline
  • From: Minnesota
  • Registered: 2013-06-10
  • Posts: 5,623

Re: Centering feeder screw cheap

elmoret wrote:

The auger is tool steel. Drilling it will be extraordinarily difficult. It will be equally difficult to get a hole in the nozzle that is centered relative to the internal cylinder of the barrel (note that this is not necessarily centered relative to the outside diameter, or the threads).

The pin will wear against the brass. This will dump debris into your filament. If you still feel inclined to try, solid undrilled nozzles are available in the Filastruder store. They are 1/2" NPT thread.

The correct answer is a melt filter. This is the last time I'll comment on the issue.

Let me see if I understand what your saying.  A melt filter is the correct answer?  Are you sure? wink big_smile

Printit Industries Model 8.10 fully enclosed CoreXY, Chamber heat
3-SD3's & a Workbench all fully enclosed, RH-Slic3r Win7pro, E3D V6, Volcano & Cyclops Hot End
SSR/500W AC Heated Glass Bed, Linear bearings on SS rods. Direct Drive Y-axis, BulldogXL
Thanks to all for your contributions

wardjr's Website

4 Reply by tonycstech (edited by tonycstech 2014-08-12 02:32:14)

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

Re: Centering feeder screw cheap

Filter is like a band-aid to a gunshot wound, not a bullet proof vest for sure.
Buying 1 good drillbit to get the feeder drill drilled should not be a issue.
Finding center of the feeder drill is eazy, all you gotta do is to look at it rotate and see what part rotates the least and mark it.
Drilling feeder slightly bigger diameter for the pin creating clearance allowing slight motion inside the feeder drill, but the brass end cap should get smaller hole to restrict pin motion so it does not grind against softer metal.


I am not trying to force the drill to stay perfectly centered, i am trying to guide it.

Can you sell an off centered drilled 1.75mm nozzle ?
http://www.soliforum.com/misc.php?actio … =6792t7291

Post's attachments

New Bitmap Image.jpg
New Bitmap Image.jpg 15.27 kb, file has never been downloaded. 

You don't have the permssions to download the attachments of this post.
my thingiverse http://www.thingiverse.com/tonycstech/designs
my 3d models http://www.turbosquid.com/Search/Artists/tonycstech

5 Reply by tonycstech

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

Re: Centering feeder screw cheap

After getting the nozzle off and taking a close look at how things rotate, i found that using my method getting the feeder centered is impossible. There is no center, its all moving around with nowhere to drill to insert a pin.

Only if there was a way to get something at that tip to point toward the center, maybe get it glowing hot and hammer it ? Or weld a piece on to its tip ?

Another thing i found is, the diameter of the nozzle is 1.6mm or 1/16 of an inch. And it was not drilled in the center, otherwise i would consider welding something on to the tip of the feeder screw so i would have a way of attaching the pin that would go thru that hole.

my thingiverse http://www.thingiverse.com/tonycstech/designs
my 3d models http://www.turbosquid.com/Search/Artists/tonycstech