Today I wired up my rebuilt drill motor on its test stand, and then tried testing it. It works!
But I don’t like it!
I had guessed correctly that the electric drill parts were internally wired through the well known AC/DC universal motor circuit. The stator and the rotor are operate through series connections, with the rotor and stator placed at right angles to ensure movement (the “right hand rule” of electromotive force).
Below you see my soldered connections.
The universal AC/DC motor circuit
For safety safe, I am on the other side of my shed. I have the test stand plugged into a power strip which is in turn connected to my shed’s master power switch.
I
I predicted that the motor has quite a kick… and I was right!
- The motor test stand is clamped to my workbench before I apply house current..
Okay, so it works.
I don’t consider my experiment to be a failure. However, I have decided not to use a drill motor to power my lathe.
The stator windings and the carbon brushes heat up extremely fast. After about 10 seconds,
this motor begins to smoke. From this I can conclude that this drill was clearly only meant to be operated intermittently. The test stand is also extremely noisy, and I believe operating a lathe using this as a motor would drive me more insane than I already am.
I think I’ll keep the Jacob’s chuck from the Craftman’s drill. But I think I want to buy a motor known to be safe, rather than build a motor..
