I have a 1900RPM 450W 90V dc motor I wanted to use on a 2" belt sander build. It was a pitching machine with 2 motors but only one motherboard. My first thought was a router controller would work but it doesn't. I don't know if it's because this motor may be brush-less or if it's because the router controller varies the voltage, but the router controller doesn't spin it right. Anyone know?