ZWO AM3N strain-wave equatorial/alt-az mount, 8 kg payload without counterweight (13 kg with), 4.1 kg, with TC40 carbon tripod.
ZWO AM3N strain-wave equatorial/alt-az mount, 8 kg payload without counterweight (13 kg with), 4.1 kg, with TC40 carbon tripod.
The AM3N is ZWO's compact strain-wave (harmonic) mount: light enough to carry in one hand, yet it holds 8 kg without a counterweight and 13 kg with one. It is the improved second edition of the AM3, with more payload, better precision, better low-temperature behaviour and internal cable management.
A strain-wave gear with a synchronous belt (300:1) gives high torque with no meridian-flip balancing worries and, in most setups, no counterweight. It works in equatorial or alt-azimuth mode, has a power-off brake on the RA axis and a mechanical zero position, and is controlled by ASIAIR, the included hand controller, or a PC over USB, Wi-Fi or Bluetooth. Every mount ships with its own periodic-error test report.
Supplied with the ZWO TC40 carbon-fibre tripod (made for the AM3, AM5 and AM7 mounts), which bolts directly to the mount base.
| Mount type | Strain-wave gear mount |
|---|---|
| Modes | Equatorial / alt-azimuth |
| Drive | Stepper motor + synchronous belt + size-14 strain-wave gear, 300:1 |
| Payload | 8 kg without counterweight; 13 kg with counterweight |
| Mount weight | 4.1 kg |
| Periodic error | < ±15″ (288 s period) |
| Resolution | 0.17″ |
| Max slew speed | 6°/s |
| Latitude range | 0–90° |
| Azimuth adjustment | ±6° |
| Saddle | Losmandy and Vixen |
| Counterweight bar thread | M12 × 1.75 |
| Power | 12 V DC, at least 3 A, 5.5 × 2.1 mm centre positive |
| Power consumption | Standby 12 V/0.65 A; tracking 12 V/0.8 A; GoTo 12 V/1.3 A (1.8 A heavy-load mode) |
| Guide port | ST4 |
| Connectivity | USB, Wi-Fi, Bluetooth |
| Brake | Power-off brake on RA axis |
| Operating temperature | −20 to 40 °C |
Mount, hand controller with 2 m cable, 2 m USB-B and 1 m USB-C cables, PE test report, quick guide, M6 hex key; ZWO TC40 carbon-fibre tripod
Specifications from the manufacturer's manual, checked 2026-11-06. Supplier reference 87229.
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ZWO AM3N strain-wave equatorial/alt-az mount, 8 kg payload without counterweight (13 kg with), 4.1 kg, with TC40 carbon tripod.
