Hi Clive and Neale,

Thanks for your input, Clive I am running this from a dedicated machine!

Neale, I have changed the max current on the drivers from 3.5A to 2A and the job ran all the way through both the roughcut 30mins and the finish 1h35m YIPPEE...........

Ok, so without getting too excited as I obviously will try the job again to prove a cure, but what are the consequences for the machine of me reducing the max current through the driver?

Would it be worth me stripping the driver apart to make sure that the chips are heat sinked correctly?

Earle