Adjustable Z Endstop for Prusa

by kwixson, published

Adjustable Z Endstop for Prusa by kwixson Sep 9, 2011
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Want a better way to level your print bed and get just the right nozzle height? Can you never seem to get the z endstop to stay in one place? Tired of changing start.gcode? Then this thing's for you! With kwixson's adjustable z endstop for prusa mendel, adjusting your nozzle height is as simple as turning a hex key.

This works with my x-end motor mount. Mileage may vary. Fully parametric. Season to taste. STL sized for metric M3 screws and nuts.


Put hex nut in nut well of the clip, fit over x-end motor mount and set with screw. Assemble plunger with spring, screw, three washers and three nuts.

Install and bring nozzle tip into light contact the print bed or plate at the home position. Adjust the end stop plunger to trip the endstop switch. Home the Z axis again to check adjustment. Home the Z axis in each corner of the print bed and adjust print bed height to light contact with the nozzle tip, matching the contact at Home X/Y. Adjust plunger to desired nozzle height (tighten it down by 1/8 or 1/16th turn).

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After printing the positioning was not optimal. I made a derivative that mounts on the side. Thank you for the original, including the openscad original.

yw. Good work on the rewrite. I'm sure a lot of people with post-i1 version Prusa's will find it helpful.

I found this piece amazing, very useful , thank you very much!

This has helped me retain my sanity.

This is smart and I desperately need it!

I printed this and it works really nicely. Well done.

Thank you

Love this idea, I took a slightly simpler route. Drilled a hole just under 3mm in my X-end, threaded an M3 into it. The M3 pushes the endstop, not extra parts!

Thanks for commenting. I wouldn't want to drill holes in my parts, though, especially since I got them on eBay and not sure how they are filled. Also, I wouldn't have the nut trap that way. You'd have to tap the hole (again, through uncertain fill) to get it to work right.