H-M Supporter Gold Member
- Jun 12, 2014
This should work well, are you displaying RPM on the display screen or a separate digital RPM display? I often set up the VFD display with a multiplier for the frequency or motor RPM with a single speed to give spindle RPM, but it will not read correctly when the back gear is engaged. Using a remote display, there should be a speed voltage output on the VFD that can be scaled in a digital display or to an input, I use a resistor divider network to set the range for different mechanical speed ranges, assume this can be set in a computer interface. Alternatively for a simple stand alone digital display the $18 eBay tachs work darn well, and simple to install. System is looking really nice, will be super quiet vs. what you had.I can get away with taking the speed value from the VFD because the system is direct drive now.