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Might not be really clear so will try to take a photo...

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but.... Y axis, threaded rod use to translate the stepper rotation to a linear motion.... but should I fit just one capture nuts to one side or one to both sides of the gantry that connects to the X axis (same on X and Z).

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CNC will machine wood and not to hyper precision so not using linear rails etc.

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Regards,

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Dom

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Don’t forget to put a special grease on the threaded rod it is called kluber grease and it never deteriorates get on amazon

Show a full picture of the machine

Regards

Harko

I'd go with a single nut - if you use 2, you'll have to come up with a way to make one of them adjustable to ensure it stays in synch with the other one. I'd also avoid grease lubrication - it ALWAYS acts as glue for wood dust. A better choice is something like NEOLUBE that leaves a dry film of lubricant. (There are other brands; I'm familiar with NEOLUBE because the major free world navy that gives me retired pay used it.)

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Roy

Thanks, Will probably just go with one as the sync, binding issues are not to be discounted. Yes any thread lubricants will act as a magnet for swarf hence the planned extra shield either side of bed, and a vacuum of course. Dom