HIgh Precision Z Probe Arm for mouse micro switch - Auto Bed Level

by Renfro May 29, 2017
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Very slick design. Do you have any links for how the servo/switch all go together? Or is there a thread somewhere that lays out what a person has to do to replicate your system?


The servo motor comes with a control arm that goes into the groove in this par much like in the pictures of my previous (much shorter and not so precise) version https://www.thingiverse.com/thing:902402. The servo then attaches to the control arm with a screw (also supplied w motor). You'd have to find a servo motor mount for your printer and configure the firmware to work with auto bed level. There are quite a few tutorials on youtube, I'm sure you can find the one for your specific printer there

With that said, micro switch based Z probes are designed to be used with non metal heat beds. If your printer has a metal heat bed you'd probably be better off with a inductive sensor.

EDIT: This might help https://www.youtube.com/watch?v=EcGFLwj0pnA

Auto bed leveling Z probe arm for the TowerPro SG90 9G Servo 22mm Arm
by Renfro

Thank you for the youtube link, as well as your comments. I am intrigued because it seems like a very cheap way to do auto bed leveling. Who doesn't have an old mouse in a box somewhere? And if the accuracy you are getting is repeatable, it would seem to be the best solution. And yes, I do have an aluminum bed, but I print on glass.... anyway.. thanks again!

And cheap was the reason why I went the servo/switch route, already had both in the junk pile. So we are on the same boat. Just in case you have the mouse but no servo, they are really cheap on Amazon or, if you're not in a hurry, $1.60 from China https://www.aliexpress.com/item/digital-Micro-Servo-9g-SG90-For-RC-Planes-Helicopter-Parts-Steering-gear-Toy-motors/32679379206.html