Hi Hood I think I have set something up wrong. I wrote a short program up on my computer in the house, saved it and loaded onto my workshop machine. it was written with a g21 at the start. The machine did it but in imperial, looked at the Native units they are set at metric. I think I must have confused the machine when first linking it up to the computer. It said something about designating the units and not to use it for changing from program to program , I must have pressed the worng button, will redo the setup. Thanks to your efforts over the past couple of weeks got everything going, so not too worried, I konw it all works so its just a matter of tweeking it somewhere. PS Done the spindle with the aid of Roy at DIYCNC again it was a simple wire in the wrong place. That sums me up SIMPLE, good practical engineer, but usless at electronics. cheers mate