Hi Muzzer, theres no rush but thanks that would be great if you could....

With regards to the Break Resistor I've been doing a bit more reading and testing with the info you provided on the VFD Parameters and had some noticable results, however, still not close to where I would expect to be with break time and i'm getting close to the top end of all the parameteres, I think the main parameter causing me issues is the 01_08 'DC Break Starting Speed' I've got this set to 3000rpm which Is the most I can set it too, and sure enough when I stop the Spindle it slows down but it takes around 17s to get to 4000rpm then as it hits 3000rpm it stops dead - total time around 19s from 20,000rpm to 0rpm - I would of expected around half that time to be honest.... I could increase both the breaking current parameter a bit more, they're both at 100% at the min and it says I could go up to 150% I thunk

Cheers,

Phil