Thanks guys
Starting to get on top of it now, after many pages of this forum. A great source of info, thanks again to all.
Anyway it's only a small lite frame setup, guilts about 2mtrs by about 150mm which is limited by the machine size (see other post) so acceleration shouldn't be a big drama.
I've maxed out the acceleration and set cv to .000001 and it now travels at reasonably constant speed, I'll just have to find the maximum velocity it can comfortably run at.
Even though I've been using mach 3 for a few years now it's not until you try a new project that you realise there is soooo much more to this software!
I'd love some feed back on my other post about using one of the axis to turn the roll holding the quilt.....
Cheers for now, Dave