- Thu May 22, 2014 11:00 pm
#171394
Hi everyone, I'm having a little problem with choosing the right type of motor for my project and would really appreciate any help. The goal of my project is to create a mini polisher/grinder. This means having a motor spin at a controlled speed while a metal disk is placed on top. This disk will have sandpaper on it such that I can grind some really small (micrometer size) glass tips. I need the motor to have 2 modes: slow (~40 rpm) and fast (~400 rpm). Can anyone suggest which motor would be best for this and how exactly i could go about controlling the speed of rotation. I really appreciate the help!