by Zaggo, published
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
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Combining this with coordinate-transformations like nophead did for hydraptor
could be awesome.
Move the bed around, do multiple meassurements and not only home the z-height
but also adjust for the bed not being perfectly level.
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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:
ReplicatorG: github.com/zaggo/ReplicatorG (ZProbe branch)
This is all still in a very early stage, both hardware and software.
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