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Another compact extruder

by misan, published

Another compact extruder by misan Mar 12, 2013
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Summary

For a Reprap-fab.org hotend and for Prusa i3.

Instructions

It's based on Josef Prusa's compact-extruder. Now it is for a 30mm distance between support screws.

It seems to work ok.

Uncomment the idler command in the source code to get one too.

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Misan's Another Compact Extruder Fan Holder

Cool, thanks for the link.

I like these compact extruders generally, and in fact I forked your Prusa3 on Github as the basis for the one I built for my 2engineers motor. The one downside I find in this general design is that the filament path is tied to the main block, so it's not possible to just pull the filament straight out when you want to change it. For my next revision I think it will be better to have the top filament guide attached to the idler part, and hinge the bottom of the idler.

Much easier that way.

But for filament change I just reversed the extrusion manually till the end and then pushed extrude to get the new one in. If it did not work I tried again rotating the filament a bit so the tip will find its way down.

Actually that gives me some ideas, because I tend to do most of my printing from the SD card. Either I could add a .gcode file to the card that heats up the hot end and reverses the filament out of the extruder, or it might be very useful to have as a menu option in Marlin.

I bought this motor from Neuhold Elektronik a few months ago.

I bought the MK7 drive gear on eBay from snipermand and hotend from eBay user reprapper.

Where do you get the stepper/gear?

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