Barry,

I managed to calibrate the machine and will increase the velocity as suggested. As you say when the gcode was created the feed rate was set. I'm using Vetric 2d to creat the code and the settings direct from there.

Are there or is there a set of standards that should be adopted?

Yes miltiple pass. The bit is 3mm and the pass is 1.5mm according to Vetric 2d.

Not actually cutting yet as ive still to set up my table as suggested in earlier posts when getting the machine to work.