When I turn on the spindle (by means of VDU) the machine starts to clunk , Carve button goes blue and then locks out. If I wait a minute Easel goes back to the green Carve button. If I press Carve it takes me through the whole setting up to carve process again with eventually the same outcome. I’ve removed all wires from Black Box and spindle to check all are connecting etc and everything is fine. What else can I try?