My Laser Scepter - Rendering 6
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This rendering is a close look at the 2 mirror stages and the drive train. The motors, shown here in red, are Maxon swiss made 12mm diameter DC motors with precious metal brushes. They are driven by an Adafuit motor shield for the Arduino Uno. Both stages rotate about a common centerline so the support bearings for the secondary stage also support the primary stage. Notice the custom made motor shaft couplers, they are EDM cut flexures that are stiff in tortion but allow for some misalignment of the motors to pinion gears. The motor shafts are only 1.5mm (1/16th") to give you an idea of scale.
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