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This instructable is about building a cartridge extruder and having my first experience using a laser cutter. A fun project to mix 3d food printing tools with my learning process here at Pier 9. For testing purposes I also build a stand to hold the extruder, and since we were already in the mood, it was laser cut too.

I am attaching both .svg files and the .igs file from Fusion 360, first time using it!

To build your own you will need:

  • Laser cut parts
  • Cartridge and piston
  • A non-captive linear stepper motor Nema17, make sure the shaft is longer than 7 inches
  • 4 x m3 10mm bolts (to hold the motor)
  • 4 x M3 25mm bolts and nuts
  • 1 x M4 20mm bolt and nut

Step 1: Assembling It

Gather all the parts. I highly recommend following the pictures rather than reading.

  1. Attach the motor to the motor plate using the 10mm length M3 bolts
  2. Insert the vertical holder through one of the lateral-centered slots. In the other one insert the vertical spacer. Make sure the long part of the vertical holder is on the motor side
  3. insert the cartridge plate using the slots into the vertical holder and spacer
  4. Lock both plates using 25mm M3 bolts and nuts
  5. Insert the piston into the cartridge.
  6. Test that the cartridge slides tight in between the two plates
  7. Insert the M4 bolt into the shaft holder slot
  8. Screw the shaft through the stepper motor until it locks into the piston
  9. Make sure the flat side of the shaft end is parallel but on the opposite side of the vertical holder
  10. Slide the shaft holder through the vertical holder and the end of the shaft too. The flat side should coincide with the nut
  11. Tight the M4 bolt, to fix the shaft holder to the shaft

And that's all you need, now you have your assembled extruder.

<p>Really great! I wonder why I can read in the text &quot;Si no quieres caldo toma 2 tazas&quot; XD</p>
<p>It looks great !! I really would like to do it but I don't find the SVG file. Can you help me ?</p>
<p>I have attached to the first step a zip file with both svgs files, let me know if that works for you. Thank you</p>
<p>Thanks for you answer ! Unfortunately, I don't see your zip file. There is only the IGS file. It's strange.</p>
<p>Weird, reuploaded. Let me know if now works, thank you</p>
<p>I just see black image (.jpg) but it don't works. I tried to change .jpg with .svg but it don't works too. Can you upload a .zip instead of .igs in the first step ? </p>
<p>there should be a zip file in the first step. Hope this times works.</p>
<p>Yes it works ! Thank you very very much !</p>
<p>Hi thank you for the comment. It is weird svgs are attached under the first step but the appear as black images, at least for me. Let me see what I can do to solve it...</p>
<p>Hey, Fusion 360! I use it too, and I think this is the first time I've seen someone else use it! Nice use of 3D modeling + laser cutting, btw.</p>
Thanks for your comment. Fusion 360 is been great so for me,before I just used Openscad, but still loooooots to learn.
<p>Nice test rig! I can't wait to see the progress you make during your time on the Pier!</p>

About This Instructable

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Bio: My name is Luis, I am from Barcelona and for the last years I've developed a curious obsession merging food and rapid prototyping. To ... More »
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