Hi all,

I am new to CNC but I have always been interested in machining.
Last week I got a 3040 DQ with usb and thought it would be ok for a start but am a little annoyed to find basic problems.
The instructions are not clear and are in broken English, the left hand linear bearing was fitted the wrong way around, and when moving on the y axis quite noisy the grease nipple had made a nasty groove along the inside of the left rail.
I have removed the nipple just to carry out some test runs and found a problem with the x axis this is not accurate and very noisy especially when changing direction.
I have swapped the x and y connections over on the controller and the problem moves to the y axis, the x axis is then smooth.
From my basic knowledge it seems to be a stepper controller or a software issue, can anyone advise.

Many thanks

Len