Starizona microtouch driver

The motor has been tested to lift at least 70 pounds! When you remove the manual focus knobs on the standard Feathertouch focuser to install an autofocus motor, you can see the internal reduction mechanism. The fine-focus shaft to which the motor gear normally mounts is pinched by three stainless steel bearing balls held in a brass housing. When the coarse-focus knob is turned, the brass housing and balls are turned directly. This drives the pinion shaft which moves the focuser drawtube.

When the fine-focus knob or focus motor turns the fine-focus shaft, the balls are turned more slowly because of the difference in radius between the shaft and the bearing balls.

This gives the fine-focus reduction. With the gearing of the standard MicroTouch motor, the resulting ratio is Unfortunately, with a heavy load, the drawtube resists the upward pull of the payload against gravity. The fine-focus shaft can then slip against the bearing balls and precision focus ability is lost.

The Starizona MicroTouch Direct Drive avoids this problem by using a high-ratio gear reduction assembly. The motor drives the pinion directly, bypassing the fine-focus mechanism. Exploring the universe is hard; finding the right equipment shouldn't be. Turn your Newtonian telescope into a fast, high-quality astrographic instrument with the Starizona Nexus focal reducer.

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