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WarpAstron WD-17 Harmonic Drive Mount
WarpAstron WD-17 Harmonic Drive Mount
WarpAstron WD-17 Harmonic Drive Mount
WarpAstron WD-17 Harmonic Drive Mount

WarpAstron WD-17 Harmonic Drive Mount

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Email us a question about this ProductWarpAstron

WarpAstron WarpDrive WD-17 Strain Wave Harmonic Drive Mount

The new WarpAstron WD-17 is an extremely compact but strong harmonic drive mount that uses a direct drive connection to connect the strain wave reducer. This gives unmatched precision and response time as well as virtually eliminating backlash and noise.

The mount head weighs just 4.3kg including the dual Vixen + Losmandy mount head, and has a load capacity of 13.5kg without a counterweight, or even 20kg with a counterweight!

On top of this, the lack of belt or gears means almost zero maintenance required. 

Direct Drive Connection

The servo motor connects directly to the Strain Wave Reducer. No backlash and belt aging issues.

Consistently Precise

High precision encoder for servo motor, rapid correction response time and high power density.


Weighs only 4.3kg supporting both Losmandy & Vixen dovetails.

Coordinates memory based homing

Coordinates and home position can be memorized even when powered off.


Reliable operation in extreme cold, even at -25°C.


No more noise from stepper motors and gears, neighbour-friendly.

Built in GPS

Automatic positioning to sync date / time / location for easy outdoor operation.

5-Axis machining

Main body integrally-formed by 5-axis CNC to ensure high strength.


Specifications: WarpAstron WD-17 Harmonic Drive Mount

  • Mount type: Equatorial/Altazimuth
  • Reduction gear:
    • Ra: 17 Strain Wave Reducer
    • Dec: 14 Strain Wave Reducer
  • Drive: Direct-drive motor with SWR
  • Motor: BLDC servo motor
  • Weight: 4.3kg (9.4lb)
  • Load capacity *1
    • 26Nm (standard) / 38Nm 
    • 13.5kg (29lb) without counterweights
    • 20kg (44lb) with counterweights
  • Material: AL6061, stainless steel, brass, ABS
  • Brake: RA axis
  • Dovetail: Vixen & Losmandy dual saddle
  • Counterweight shaft: M12 (1.75mm pitch)
  • Max slew rate: 3.5°/s
  • Adjustment range: ALT 0 ~ 90°, AZ +/- 8°
  • Operating temp: -25°C ~ 50°C
  • System: OnStep
  • Protocol: ASCOM / INDI / LX200 / INDIGO
  • Home control *2: Coordinates memory (FRAM)
  • PC connection: USB Type-C *3
  • Guide connection: USB Type-C (ST4) *4
  • Time and location: Built-in GPS
  • Power: 12V 5A 5.5*2.1/2.5mm DC
  • Wireless *5: WiFi 802.11g / Bluetooth

1. Standard: Recommend for better performance; Max Allowed: Load can be moved by mount; User should also consider the tripod stability and centre of gravity to use counterweights properly.
2. WD-20 equipped with home sensors on both axis, it can return home even with error coordinates; WD-17 can return to home position relying on coordinates memorized in FRAM Chip, which can save data when power off.
3. Mounts support both USB Type-C to C and USB Type-C to A cables.
4. ST4 port used for hand controller connection, and ST-4 guide which require an optional converter for connecting with RJ-12 port.
5. Wireless functionality may vary by country and region. 

What's in the Box

What's in the Box: WarpAstron WD-17 Harmonic Drive Mount

  • WarpAstron WD-20 mount
  • Aluminium transport box
  • DC power chord
  • USB type-A to type-C cable
  • Hand controller
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