I am a new carvewright user I received it 7-16 have only 2 hours on the machine and went to use it today and it said z axis stall so called customer service ran a test they said it was the z motor then called back and ran another test this time said it is power supply problem sending me new power supply.I guess what I am saying I am impressed what the machine can do but after only 2 hours and already having issues don't know what to expect as far as problems. I know the machine has been out since early 2000's as compucarve have things gotten better.