AstroEQ Tutorials Wiki

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Common Gear Ratios

When downloading the configuration files, save them into the mounts/ folder of the AstroEQ Configuration Utility. You can them load them on the configuration screen when programming the mount.



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EQ3-2

The following are ratios for an EQ3-2 or CG4 mount fitted with the 'Dual Axis Kit' motors. There are two different gear ratios possible for the declination axis that I have come across. This is one.

Right Ascension Declination
Motor Step Angle 7.5 degrees 7.5 degrees
Motor Gear Ratio 120:1 80:1
Worm Gear Ratio 130:1 65:1
Microstepping 1/4 Stepping or 1/2 Stepping
Config. File eq3-2-skywatcher-type1.conf


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EQ3-2 Alternate

The following are ratios for an EQ3-2 or CG4 mount fitted with the 'Dual Axis Kit' motors. There are two different gear ratios possible for the declination axis that I have come across. This is the other.

Right Ascension Declination
Motor Step Angle 7.5 degrees 7.5 degrees
Motor Gear Ratio 120:1 79.2:1
Worm Gear Ratio 130:1 65:1
Microstepping 1/4 Stepping or 1/2 Stepping
Config. File eq3-2-skywatcher-type2.conf


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EQ5

The following are ratios for an EQ5 or CG5 mount fitted with the 'Dual Axis Kit' motors.

Right Ascension Declination
Motor Step Angle 7.5 degrees 7.5 degrees
Motor Gear Ratio 120:1 120:1
Worm Gear Ratio 144:1 144:1
Microstepping 1/4 Stepping or 1/2 Stepping
Config. File eq5-skywatcher.conf


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HEQ5 Standard

The following are ratios for a standard HEQ5 mount (Not Syntrek or Synscan).

Right Ascension Declination
Motor Step Angle ? degrees ? degrees
Motor Gear Ratio ?:1 ?:1
Worm Gear Ratio 135:1 135:1
Microstepping 1/4 Stepping or 1/2 Stepping

Please note this is incomplete. I am endeavouring to find out.



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HEQ5 Syntrek

The following are ratios for a Syntrek or Synscan HEQ5 mount.

Right Ascension Declination
Motor Step Angle 1.8 degrees 1.8 degrees
Motor Gear Ratio 5.22222222:1 5.22222222:1
Worm Gear Ratio 135:1 135:1
Microstepping 1/32 Stepping or 1/16 Stepping
Config. File heq5-syntrek.conf


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EQ6 Synscan

The following are ratios for a Syntrek or Synscan EQ6 mount.

Right Ascension Declination
Motor Step Angle 1.8 degrees 1.8 degrees
Motor Gear Ratio 3.91666666:1 3.91666666:1
Worm Gear Ratio 180:1 180:1
Microstepping 1/32 Stepping or 1/16 Stepping
Config. File eq6-synscan.conf