HURCO BMC-20P retrofit

7i92
7i77
7i74
7i70
7i71
I did not push it over 24 m/m, left it at 9m/m.
It had 2510 ballscrews, so plenty of speed.

The VFD has a small board inside with yellow wires and 2 small transformers, had to solder those pins as one of them had a cold contact, but still had other issues, it would work for 2 to 4 days non stop and all of the sudden would error as under/over voltage. The owner never got a new drive so it was used like that for a while, now i do not know what the status is as i have no access to it any more.
My advice, get a new VFD, it is a risk using the old one. I had 2 working servo drives when i started retrofitting it, by the time i was done both of them crapped out. They do not like to be left unused for long periods of time, pity as the Yaskawa makes some very nice drives.
Beware that if you have to change the drives, you will most probably have to change the encoders or motors also, the original Yaskawa encoders are not standard incremental ones. And removing them from the motors was a PITA!

Leave it on and spinning at some low speed all day every day.

I remember using Carousel comp made by Andy for sure, but i do not remember why and how i used remap.
I also recall it having an index pin and a pocket pin ( pin=switch=sensor) and a relay board that controlled the tool changer that after a bit of cleaning and service got to work nicely again after wiring it to 7i77/7i70/7i71.

Glad you got it working, it's nice to see old machines brought back to life.