Thanks Ger21,
I know why using g340 instead of g320 but I would like to choice between :
- a g340 that multiply clocks
- a g320 with less points per revolution (even with a divider between encoder and g320).
I've heard that g340 with it's multiplier is fine but I can't figure how it can multiplying clocks smoothly.
for each clock my computer send, the g340 makes 10 clocks for example but how it can manage the speed ?
With multiplier at 10x :
- if computer send one clock each second, g340 will make one clock each 0.1 sec, very regular ?
- if computer send 100 clock each second, g340 will make one clock each 0.001 sec, very regular ?
It's hard to explain what I'm not undestanding but I think I will go to g320 (or 340 ?)

and try.
Thanks,
GB