High power focuser motor with 1:120 reduction

Description

🌌 12V Unipolar Stepper Motor – High-Precision Focusing for Crayford & R&P Focusers

This unipolar stepper motor features a built-in 1:120 reduction gearbox, delivering 5760 steps per revolution (~3 µm per step) for precise focus control in instruments with focal ratios of f/3 or slower. Compatible with Robofocus standard, it works with controllers like AstroLink, AstroHub, Moonlite, USB Focus, and others.

⚙️ Key Features:

• Torque: 40 Ncm, suitable for medium and large Crayford or R&P focusers (up to 3″, loads 4–5 kg)
• Electrical: RJ 6-pin socket; cable ends with RJ6 or DB9 plug
• Metal gears for durability
• Recommended settings: 350–400 mA, 150–250 steps/sec, unipolar, 0.2 s acceleration, 0% hold torque

📦 Mounting Options:

• Type A – vertical slits, 5.5 mm wide
• Type B – universal slits compatible with many market focusers
• Custom mounting options available via contact form

💡 For microfocuser shaft rotation, use the 1:20 reduction version.

📊 Technical Data:

• Voltage: 12 V DC
• Current: 0.4 A
• Resolution: 5760 steps/rev (~3 µm per step)
• Max speed: 250 steps/sec (4000 µs step delay)

More info on focuser motor solutions: AstroLink Focusing Stepper Motors