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CG5 Goto motors


ispookie666

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I recently bought a used CG5 mount with Advanced GT.  Used it a few times but yesterday had a runaway RA motor.  

Is there a ready replacement or preassembled kit to replace the motors and controllers on CG5.  I had a look on OnStep, but boy thats a lot of tinkering - would be great if there was preassembled kit. Or any other suggestions.  

May just cut my losses and buy a new mount🤐

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Seems runaways are a common thing with this mount.  From memory (therefore I could be wrong) the mount uses servo motors rather than stepper motors so rely on encoders to provide feedback on the axis position, so it's more likely to be the motor board that is at fault rather than the motor itself.  

Replacement boards are available, but not cheap at around £180 Example here

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I've fixed a few Skywatcher board that had blown PICs on them, but the issues there was with communications not motor control.   

You could try flashing the firmware using the Celestron firmware manager application and see if that resolves the issue.  

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58 minutes ago, ispookie666 said:

I'm new to all this. The GoTo handset is old and has something like an RJ11 socket. Does this need a RJ11 to usb convertor? 

Are you trying to connect the mount to a PC?  - if so I would contact a suitable retailer such as FLO and ask if there is one that is suitable.  A lot of scopes use standard connectors, but they don't wire them in the recognised standard so you can end up doing damage by using standard adaptors 

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  • 1 month later...

Have been using the EQ Star Pro version for CG 5 and cannot fault it.  

Connected to EQMod, PHD2 and Gamepad .  Using stellarium is a lot easier compared to the handset.  

Managed to auto guide and it was not too bad.  Have only gone for 45sec ISO400 exposures and have not seen any star trails.  

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