Troubleshooting Z Sensor Problems in LongMill CNC: Fixing Clamping Nuts & Inductive Sensors

Attention all CNC users of clamping nuts and inductive sensors! If you're experiencing issues triggering your Z sensor with the ACME clamping nut, Jason has the perfect solution for you. Discover how to optimize your setup for seamless performance.
Inductive Sensor Kit for the LongMill MK2
bit.ly/3wBjOTp
T8 Clamping Nut
bit.ly/3wyBwqt
T12 Clamping Nut
bit.ly/3wA7QJK
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#cncissues #zsensorproblems #clampingnuts #inductivesensors #cncsetupfix #machiningsolutions #longmill #siencilabs #precisionfix #manufacturingfix

[@WanderingStar-fq4cn]

I had the problem mentioned, support had me do this “fix”, making the little up movement of the Z-axis fixed the problem. Figure in the future when I replace black backlash nut with the new white ones there will no longer be a problem.

[@mikeamescreations]

I put on the new sensors, and they worked perfect. THEN, I upgraded to the new spring loaded backlash plates. They worked perfect on the "Y" axis, but the Z axis has a clearance problem. ...the tapered end of the backlash plate is up. (springs at the top) Do I have them up-side-down? I took out the lock washer thinking this would give me the clearance I needed but that didn't work either. I'm sure there is a simple solution to this but I couldn't figure it out. I just want the new backlash plates to work with my sensors. ...what's your solution?

[@michaelbruner3555]

How did you get your 'Z' Axis nut on? Mine was too thick (small raised area next to threads) and would not fit in opening.

[@SienciLabs]

Earlier versions of LongMills, pre-fall of 2023 can only use a brass ACME nut on the z-axis due to the size of the space where the nut sits.

[@michaelbruner3555]

@@SienciLabs What was the fix you applied to the newer machines?

[@JoeLazzara]

So on the MK2, if we have the brass nut on the Z lead screw, we CAN NOT replace it with the clamping nut?

[@SienciLabs]

Correct, the space on earlier machines is too small for the clamping nut to fit. All other brass nuts can be replaced with the clamping nut.

[@JoeLazzara]

@@SienciLabs Ok, sounds good. Thanks so much.