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mrm64

Compact Bowden Extruder Plus

by mrm64 Feb 3, 2018
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Thank you for this thing! Thumbs up to you!

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Thank you for your liking.
Now I'm planning the next version.
Please wait for next release.

The underlying seat for the M3 nut is too large, and when overturning the extruder (like for CR-10 position) the M3 drops and it is impossible to activate the screw.
I solved by putting a piece of sponge in the seat after inserting the nut.

That is a good idea.
I would like to edit this page later and reflect it in the contents.
Thank you.

Please can you explain the functionality of the 625ZZ bearing fitted in this position?

Furthermore, my NEMA 17 motor had a shaft shorter than a general NEMA 17 motor, so i had to arrange the bearings inside the drive gear.
As a good side effect, it became possible to check the drive gear in real time during printing.

I have two reasons to use the 625ZZ bearing for the motor shaft.

The first reason is to suppress the heat generation of the motor.
When tightening the idler's screws, a strong load is applied to the motor shaft.
The load applied to the motor shaft generates heat.

The second reason is to absorb the heat of the motor shaft.
When the heat of the motor reaches the filament via the shaft and drive gear, the filament softens.
As the filaments soften, the amount to be shaved by the drive gear increases.