I have a new 3 phase 1340GT lathe with Hitachi WJ200 VFD, and have it wired up per Zmotorsports wiring diagram. Everything works as it should, but I'm only getting 8hz max on the VFD display, and as a result no motor speed. The pot is a 1K, 2 watt unit that cost around $12, so not a high ticket item. The frequency changes only at the last bit of rotation of the pot knob, and is opposite of what I would expect. I have the VFD set to 80 hz max per the A004 parameter. Can the pot be causing the problem, or is there something in the VFD programming that I may have missed?