Originally Posted by
SCzEngrgGroup
Jason,
Those are the ones. Set Mach3 to 6000 RPM, and measure the voltage between the GND and AV pins of the VFD. Set this value into F2.11. Then set Mach3 to the lowest value that creates a non-zero voltage on AV (porbably about 100-200 RPM), measure AV again and set that value in F2.10. You will likely also have the change the register that sets the minimum frequency, to get the low-end speed approximately correct. You may have the fudge the values to get speeds approximately correct across the whole speed range. Use the PDB to tell you what the actual RPM is. There is also a spindle speed correction lookup table used by Mach3, if you really want to get it as close to correct as possible. I don't recall what it's called, or what the format is. I think it's called spindlespeed.dat or something like that. It's in the Mach3 manual. Of course, make sure the Mach4 pulley setting is correct as well, before doing any of the above.
Regards,
Ray L.