Hi Bill:
Yes, G61 and G64 switch between the modes.
The lookahead is automatically allocated in the latest versions. There is
a DRO to set it, I'll have to look it up, but it won't increase your
performance to change it I don't think. Mach2 uses a strange look ahead. It
decides how far to look ahead based on the type of code it sees. If a lot of
G1's are in a line, then the lookahead is 50 ahead, but if there is only 10
g1's and then a G0, then only 10 lines lookahead are used beacuse it doesn't
make sense to look at a g0 after G1's. There a few rules built in here as a
result of multiple test releases of various ways of doing this. Current
method seems to be most efficient with few problems reported. CV is always a
compromise, but I have tried to make it an intelligent one...
Art
www.artofcnc.ca
