Hello, this is my first post. I port cylinder heads for a living, and use a grinder like the one pictured above. It is a 14,500 RPM 11 amp grinder. The grinder turns too many rpm's to control the cutter well, so I "toggle" the switch manually to keep the spindle speed down to a manageable level.
I was interested in buying or possibly building a control for it so I can get the rpm's down to ~5000 rpm and stop toggling the switch. From what I've been reading the last few hours, I *think* this grinder is equipped with a *universal* motor. It does have brushes.
Would it be possible for me to build a 10 amp DC driver with a PWM controller? If it's a universal motor I can switch over to DC power, right?
Any help is appreciated.