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Spindle Wobbling when Machining Aluminium

Hi there,

I’ve been trying to contour a simple square out of 3mm thick aluminium and what I’ve found is that the entire spindle starts wobbling left and right on the Z axis as shown here: https://imgur.com/a/5omKgUv

This is resulting in cuts like this: https://i.imgur.com/VRE89xh.jpg which also leads to the Z axis randomly slouching and doing deeper cuts than it should, stopping the entire machine.

The issue is, when I try to tighten or move the eccentric nuts to a better position, it becomes very hard for the spindle to move up and down the Z Axis easily and results in the stepper stalling due to the friction between the wheel and rail.

How should I try to resolve this issue?

Thank you!

It looks like the Spindle carriage plates V-wheel holes are chewed out.

Hard to tell from the photo but appears the eccentric nut may have been in backwards, if so and the machine was loaded up heavily and jumping skipping around then this may cause the damage.

Please contact 3Dtek and we will send you some new parts to fix it up.

Cheers
Ben