Test the harmonic equatorial mount


Last year I made an equatorial mount using Harmonic reducer.Tested recently, The test was conducted recently, the following are the details and test results of the equatorial mount
Please see here

Reducer: Harmonic reducer

Basic load:> 22kg (without counterweight)

Total weight: 12.2kg including column stand

Structural material: 6061-T6 aluminum CNC machining

Latitude adjustment range: 0~90° ASCOM/handle adjustment

Mode: EQ/ALZ switchable

RA axis: 25-160 harmonic

DEC axis: 20-100 harmonics

Bearing: Crossed Roller Bearing

Counterweight: reserved installation interface

Base interface: 120 aluminum profile

Maximum GOTO speed: about 8°/s

Drive motor: 1.8° closed loop motor 128 subdivision

Power source: DC 12V~36V wide voltage input 3A

Polar axis: electronic polar axis mirror interface

Guide star interface: ST-4

Communication interface: USB WiFi

Dovetail seat: wide version dovetail seat

Control system: Onstep 3.16

The equatorial mount points to the sky above 70 degrees, with a 6-inch reflecting telescope, and the entire load is about 10kg.

Equipment situation: Asi290mc camera/FMA180 guide mirror

Balanced state: right ascension without counterweight, declination is not balanced, load is about 10kg

Environmental status: medium seeing, wind power is about 4, gust 5, moon phase is about 80%

Polar axis error: the main mirror to the polar axis, the error is <4"

Guide star setting: PHD2 2.69 dve2, open multi-star point detection.

• The guide star rate is 0.7 by default, and the correction frequency is 0.2s

• X algorithm lags 0.1, correction intensity 70%, minimum detection 0.19

• Y algorithm resists switching, the correction intensity is 100%, and the minimum detection is 0.19

• Pulse 20ms


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