Open Source, $0.00
... to 4 motors (RA, Dec, focuser and field rotator) of a equatorial or altazimuthal-mounted telescope. SoundStepper can control any type of equatorial-mounted telescopes with step motors: Manual-pointing mounts (ex: barndoor, poncet platforms, "polar axis", threaded-rod driven mounts), "meridian-flip" mounts (ex: GEM or cross-axis), and "no-meridian-flip" mounts (ex: Fork, yoke, ...
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