Mendel Extruder w/Compression & No Epoxy
by vik, published
This parametric version of the Mendel Extruder has even more parametrisations and a captive nut & bolt to stop the stepper motor from sliding away from the pinch-wheel. It also has holes to allow two woodscrews to be driven through the sides of the PTFE instead of epoxying it in place. This allows repairs and upgrading of the extruder without the use of a chisel.
An M4x40 screw is now used to strengthen the M4 stepper motor adjustment screw, and a cutout allows one of the two M4x40 mounting screws a little more room so a washer can be used underneath its head.
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This model is set for 18mm PTFE. Please change the SCAD file if yours is a different diameter.
No epoxy needed. Just drill two 2mm holes through the holes in the clamp right through the PTFE rod. Follow up with a couple of woodscrews and she's well stuck.
If your PTFE rod does not easily fit in the cavity provided, warm the cavity with a blowtorch or hot air blower of some description.
The mendel_misc.inc file is found here: http://www.thingiverse.com/thing:2192