"Universal" AC/DC motor

[Swede]

Hey guys, I am retrofitting a Sherline "Industrial" (ER16) spindle with a motor that I have on hand, a 20,000 RPM beast that I will reduce to 8 to 10K at the spindle. Gobs of speed and torque. My problem is that I would like to reverse the direction of the motor rotation. Swapping the leads of the DC motor controller doesn't do it! I'm not really familiar with these types of motors, it appears to have an internal brush arrangement.

Any thoughts? Thanks

Swede

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[Al_The_Man]

The armature leads have to be reversed with respect to the stator leads (or vice-versa). For reversal to occur.
Al