Syncing up dual Z screws of Neptune 3 Pro | 3D Printing | Page 1

frank forge Jan 16, 2026, 10:14 AM

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I'm trying to sync up my Elegoo Neptune 3 Pro's dual Z screws as per https://www.youtube.com/watch?v=gNq3zlj25yY, because I realised my gantry isn't level relative to my bed, because the z screws aren't synced up.
However I can only get one z screw to bottom out, the other springs back up about 1mm once I release that side of the gantry.

YouTube

Digital Digs

How to sync up dual Z lead screws on Neptune 3; pro; and Neptune 4 ...

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tiny falconBOT Jan 16, 2026, 10:14 AM

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frank forge I'm trying to sync up my Elegoo Neptune 3 Pro's dual Z screws as per https://www...

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AI Help

It sounds like one of your Z-axis screws may be slightly bent or there could be an issue with the stepper motor. First, make sure both screws are clean and free of any debris. You can also try swapping the stepper motor plugs to see if the issue follows the motor. If the problem persists, you may need to contact Elegoo's customer support for further assistance.

frank forge Jan 16, 2026, 10:18 AM

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Not sure if this is a problem or not. In retrospect I wish I'd measured the issue before trying to fix it. Then I'd at least know if it's better.

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A little hard to see in the video, but if I press down on the left side, the left coupler rotates significantly. If I press down on the right side, the right coupler doesn't budge.

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Ahah! I have got the left side significantly better by loosening the screws attaching the x rail, pushing the left side down, then tightening the screws again.

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Still a bit of play, but far better. Will mark this as solved shortly if no further issues come up

frank forge Jan 16, 2026, 11:06 AM

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?solved

#Syncing up dual Z screws of Neptune 3 Pro