I was in Harbor Freight today and they had a $17 router speed control. Thought I would try this out. Plugged in the sewing machine, set the speed control to full speed, and turned on the machine. Blew the 8 amp glass fuse in the speed control before the machine turned over. I replaced the fuse and tried it on a small drill press, and it did okay, but would not run full speed on direct. Cant imagine it doing much with a 1 1/2HP router, but ill try that tomorrow. The clutch motor has a wing nut rod which limits clutch travel. I reset it and I can pretty much sew one to two stitches at a time.