3DPrinting

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3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.

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Question about Z screw coupler (self.3dprinting)

submitted 11 months ago by ArtVandelay to c/3dprinting

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Hi all, I have a quick question about my z screw coupler (as i understand it, the metal cylinder at the bottom you can manually move your z axis up and down with).

When I manually raise the z axis (with steppers disabled) by rotating the coupler clockwise, after I let it go, it reverses it's rotation on it's own and sinks back down. This is frustrating because it takes forever to actually move it any distance. Am i doing anything wrong? Should you only ever move the z axis with software, and if so, is there a way to fix the issue of it going back down? I don't know how to adjust the tightness of this part, I'm still pretty new.

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[–] asbestos 1 points 11 months ago* (last edited 11 months ago) (1 children)

It happens, and has happened to me while moving it manually, especially if I stop and let go abruptly. If I do it gently, it’ll stay in place. It also happened a few times when I didn’t screw the Z coupler properly so it just spun out. The weight of the print head along with the general resistance and stepper rotor magnetic resistance should be enough to make it stay still, and I assume it stays still as well when you turn off the printer. Or does it just crash onto the build plate?

[–] ArtVandelay 2 points 11 months ago

I don't recall it ever crashing, with the printer on or off. I can test explicitly what it does when the printer is off, when my current print finishes