by Zaggo, published
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This is a retractable Z-Probe.
With a Z-Probe your Makerbot is able to "auto home" not only X & Y but also the Z axis. This is done by mounting the endstop on your Makerbot in a way it senses the build platform directly (and nearby the real nozzle).
In order to get out of the way during printing, the sense-pin is retractable.
Although this is a working thing, especially the software changes are still beta. Both, firmware and ReplicatorG/host software, need to be updated. The extended versions are available as source code on GitHub.
For more information (and a sample video), see
The design is for use with a Futaba servo S148. That's the servo I found in my junk box. I guess each servo has a different size. So the design might be more a draft for your own design. I plan to try the same thing with a smaller (and cheaper) "micro servo" in the future. I hope I'll find the time to create a parametric OpenSCAD design until then.
Since it's still a prototype, the servo is currently glued to the base plate with some hot glue.
Both, the new extruder firmware as well as the extended ReplicatorG host software, are available on GitHub. I forked both projects from Makerbot:
This is all still in a very early stage, both hardware and software.
Z-Probe by Zaggo is licensed under the Creative Commons - Attribution - Non-Commercial - Share Alike license.
What does this mean?
- You must attribute (give credit) to the creator of this Thing.
- You must distribute Remixes under the same license as the original.
- Remixing or Changing this Thing is allowed.
- Commercial use is not allowed.
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