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What is it about buying a cheap machine, you always end up modifying it to correct all of the issues....
The first thing on the Genmitsu 3018-pro were the linear bearings on the z-axis
I replaced them with simple plain brass bearings.
Then there is the spindle that comprised an ER11 chuck fixed to the end of the motor, didn't run true and resulted in lots of vibration. So I sketched out a spindle with a belt drive, this is a major improvement.
The belts are o-rings, so some trigonometry and a simple spreadsheet (free to download).
Just tried this new setup machining hardwood with a 1.2mm end mill and the improvement is well worth the few days invested in making parts.
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