Z Axis Upper Limit End-Stop for the Ender 3
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A limit-switch end-stop for the upper limit of your Ender 3 Z-axis. Repurposes the stock lower end-stop.
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- Creality Parts & Upgrades
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- Creative Commons — Attribution
The Part:
This is just a simple end-stop for the upper limit of your Z-axis. It repurposes the original Z end-stop. Of course, you won't be needing the old Z endstop since installing a toolhead-mounted probe... You have installed a probe, right?
Some people use these so they can home their axes after a power failure without crashing into a half-printed part.
In my case, I just wanted an upper-bound end stop so that if I tried to home the printer from the maximum Z position, the Z hop from "safe_z_home" wouldn't crash it. I'm not sure how to implement that yet, but that's a problem for future Conlan.
It will work on either end of the gantry without any mirroring.
Printing:
Paint seams as pictured to avoid interference with fitment.
I designed the part with a 70° overhang in order to minimize bridging, because my printer makes prettier overhangs than bridges. I ended the name of that part file with "Sloped."
That said, if you prefer a flat bridge, select the file ending in "Bridged."
Parts & Assembly:
Hardware | Note | Quantity |
|---|---|---|
end stop limit switch | repurposed original z-limit switch | 1 |
M3 machine screw, button head | repurposed from original z-limit switch | 2 |
M3 hex nut | 2 | |
M5 x 8 machine screw, countersunk | To fasten into end of 2020 extrusion. Optional. | 1 |
The part is designed to form an interference fit with the V-slots of the 2020 extrusion, and that is probably enough. However, for peace of mind, a M5x8 machine screw can be fit through to the extrusion as well. Drilling and tapping will be required in that case.
I produced the model and renders around SonOvaSailor's Ender 3 CAD model.