In the previous photographs, you may have noticed that the outer corners of the aluminum block have been ground away. Machining the wheel slot with a narrower end mill Milling slot for Lego hub and half bushingsįinally, the remainder of the wheel slot is cut all the way through the block. The bushings prevent the sides of the wheel from rubbing against the aluminum block. Next, a wide slot is milled out for bushings. Rough sizing encoder wheel holder on block of aluminumĪfter squaring up the piece, an axle hole was drilled straight through. The holder began as a block of Fortal aluminum where I roughly sketched the location of the axle. I tried to eliminate having a body on this robot, but the encoder wheel and PCB required some sort of steady mount. That’s all well and good, but the encoder wheel and emitter/detector need to be attached to something solid in order to operate reliably. Previously, we examined the infrared encoder on a free-spinning wheel. Machining the Encoder and Pushbutton Holder
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