Z Axis Break
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This is a break for the Z Axis coupler to prevent snagging of the hotend upon power loss
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Model information
- Source
- Printables
- Category
- Other Printer Parts & Upgrades
- License
- Creative Commons — Attribution — Noncommercial
This is a break that can be screwed to the Z Axis stepper motor so it stops the snagging of the gantry upon power off/power loss.
The issue I had with Ender 3 is that when the stepper motors are disabled the gantry drops with a few millimeter and I was not able to recover the prints properly in case of power outage. I have tried to tighten the eccentric nuts but it required such tightness that had a negative effect on print quality (mostly very bad elephant foot and loss of z height).
This is for 20mm diameter Z Axis coupler, but I uploaded the parametric Fusion file if that needs to be changed.
The strength of the break can be adjusted by the size/tightness of the rubber band.
Printing
Its an easy and quick print, I used TPU, a fairly hard one (95) so there is flexibility. With a not too strong rubber band it is does not hinder the movement of the Z Stepper Motor but does not allow the snagging of the gantry when Stepper Motor is disabled.