I have got it working on slow cuts now, I lowered the HYS setting to 1 and increased Mach3 RATE to 10% now it cuts good at slow speed

On a faster cut i see it follows upwards very nicely but does not follow downwards fast enough, leaving me with a very big cut height.

If the metal is shaped 0mm - 10mm - 0mm across the X axis, it will follow 0mm - 10mm but then it will finish on about 5mm not 0mm.

Any ideas??