Hi, thanks for your help, the controller was originally set up by Jazzcnc and he noted a live & neutral were crossed on the Z driver, he corrected it and got it running for me, while using the router on a job it would miss steps on the z axis so I replaced the driver and it is not missing steps on the Z axis anymore but is on the X axis so I thought I would change them all and am told the TB6600 is marginally better.