MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
This is a remix/redesign of a great design from Bruno Porto.
I just squeezed the parts to fit 3.7g micro servo instead of 9g.
It is intended to use 2mm rod (bike wheel spike) threaded on the end. The length of the rod should be 30 - 35mm depending on the setup in your printer.
I relay on gravity to drop the probe. A ring + spring setup should be added if you feel you want a reliable and always positive drop action.
The reaction arm of the servo may require a bit scaling/boring depending on your printer precision as the hole is really small and needs a tight fit with the servo.
My angles are 70 /180 deg to deploy/stow the probe.
UPDATE 5 JUNE 2019:
I've found out that if you run servo cable along the main power cables of extruder stepper motor and hot end the servo will jitter even after deactivation. The only thing that helped right away is a ferrite ring placed just next to servo. You can either buy a ready ring like this: https://static1.tme.eu/products_pics/2/4/5/24584682a19b117289970188b6d68ad4/45416.jpg or if you need something quick: use 2 M8 washers. This eliminates any eddy currents that are inducted by the motor wires. I have no issues with the servo since then. The first servo "damaged" itself and stripped all the gears due to overload from sudden moves against the parked flag.
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