Hi JAZZCNC

Yes all the points you have mentioned are correct apart from the problems about the gantry being driven from one side. The bearings are separated by 200mm and then have a large I shaped bar between them which reduces the racking effect, yes this is not ideal but it is more than adequate for little jobs in balsa and ply. The resolution is around 0.04mm and I am using 12 tooth pulleys which again are not going to product the best ever CNC machine but it is cheap and will work.

But thank you for those points, I am planning to change to supported rails and ball screws, all bought but just need to find the time to do it!

What is your opinion on the brushless spindles, you seem to know far more about quality CNC machines than myself

Regards

Joe