Charles Edward Pax

Open Source 3D printing research and design

Paxtruder-0.1

with 5 comments

IMAG0089_display_medium
As part of my Awesome August hacking I designed a slightly new extruder, the Paxtruder! This extruder is a derivative of Zach’s plastruder and I’m really excited to share it. The main difference is that exchanged the idler wheel with a Delrin plunger. This reduces the overall size of the extruder uses two fewer layers. See it in action.

Using a plunger allows the force exerted on the filament perpendicular to its direction of travel to be adjusted while the extuder is running. I mounted the electronics along the side, so I can view the teeth on the filament on the way to the thermal barrier and adjust the force to get the tooth depth I like.

With this design, changing the filament takes approximately ten seconds from when the barrel becomes hot enough. The motor can be removed with out disassembling the housing.

There is, however, a flaw in this particular design. The captive nut holding the plunger screw will crack the acrylic if you tighten things too much. In the next version I will have this fixed. This design is also based on a larger diameter timing pulley, so the filament guide is a little off.

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Written by Charles Edward Pax

2009.10.05 at 21:32

Posted in makerbot, Uncategorized

5 Responses

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  1. Awesome! A minor branding suggestion: Wouldn’t Paxtruder (no ‘s’) be closer to the word extruder and easier to spell and remember?

    Regards,
    tamberg

    tamberg

    2009.10.06 at 05:19

    • You’re right. I was debating this with myself at three in the morning after it worked and I seem to have picked the wrong name. This extruder is now the Paxtruder!

      charlespax

      2009.10.06 at 07:18

  2. Dude. Frakkin’ awesome. Might solve some of the exact problems we’ve been having with our batch at TechShop Durham.

    Vrogy

    2009.10.30 at 01:58

    • I’m designing an Paxtruder upgrade kit for the Plastruder MK4. I should be done within a month. Possibly sooner since I have a few days off from work next week.

      Check my blog in about three hours for a Paxtruder-0.2 post. Please post if you have any comments or questions.

      charlespax

      2009.10.30 at 07:23

  3. [...] a comment » I’ve updated the Paxtruder-0.1 design to address flaws and make enhancements; I present Paxtruder-0.2. After a few more prototype [...]


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