Posi Drive Motor System

$339.2 ~~$530~~ In stock

Category: Focusing

Description

The Posi Drive Motor System for the Feather Touch focuser can lift in Excess of 56 pounds. This motor system attaches to the pinion shaft and not the reduction assembly which eliminates any slip and offers precise repeatability with heavier payloads. The PDMS has 2.3 microns per step (.00009") which is 11,400 steps per inch. The PDMS-FT motor comes standard with an over-ride to allow for manually focusing with the COARSE focus knob. The PDMS motor has the thermistor built onto the motor circuit board for temperature compensation.

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Installation instructions for Feather Touch focusers

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Customer Reviews (4.6 / 5 · 5 reviews)

David S. ★★★★★ Oct 21, 2026

Installed it on my Feather Touch and the 56-pound lifting capacity is no joke—handles my heavy optical train without any strain. Focus adjustments are silky smooth and immediate with the direct pinion shaft attachment.

Brian T. ★★★★★ Oct 20, 2026

Finally, a focuser motor that doesn't groan under my CCD camera and filter wheel—the 56-pound lift capacity is no joke. The direct pinion shaft attachment eliminated all the slop I hated with gear reduction setups.

Aurora ★★★★★ Oct 18, 2026

I was a bit skeptical about mounting my heavy imaging train, but attaching directly to the pinion shaft made installation straightforward and the focuser holds rock-solid with zero slip.