Since I got my VFD the speed on the box has always been off. Not a problem really as I recall: C3D Spindle speed display as a post and reason PWN control so the voltage is off a bit but I never mapped it.
So I was bored during my warmup macro and took a sample:
| Set Speed | Actual Speed | % Difference | % Change | Needed Set Speed | Adj +% | |
|---|---|---|---|---|---|---|
| 8000 | 7998 | 0.03% | 0.03% | 8002 | 8082 | |
| 10000 | 9240 | 7.90% | 7.60% | 10790 | 10898 | |
| 12000 | 11010 | 8.60% | 8.25% | 13033 | 13163 | |
| 14000 | 12840 | 8.64% | 8.29% | 15210 | 15362 | |
| 16000 | 14580 | 9.29% | 8.88% | 17486 | 17661 | |
| 18000 | 16320 | 9.79% | 9.33% | 19762 | 19960 | |
| 20000 | 18090 | 10.03% | 9.55% | 22006 | 22226 |
I found that my numbers were about 0.67% off after adjustment so I pushed in a 1% increase and you just about always get where you are going.
I like how --I think it is Fererri’s work in Fusion you can do a mapping of speed & adjusted speeds to account for the difference. I don’t think there’s a way for me to do that in Vectric’s software. Food for thought in future CM releases, might be a nice thought.
Maybe this is helpful, maybe I’m just making a note for myself in case I lose my notes. 