HEQ5 Pro motor behaviour and sound

[tarkanyigabor]

I have just bought a brand new HEQ5-Pro Goto mount, and I was suprised when I first tried it.

The behaviour of the stepper motors and the sound of them was completely different than I expected. They have started and stopped slowly and the pitch of the motors was different.

The sound I expected was like: https://www.youtube.com/watch?v=_WRNKh5xMFg

What I experienced was like this: https://www.youtube.com/watch?v=wqHAKXCrbMA (just the sound, not the slewing issue).

What would be the reason for this difference? new firmware, new type of stepper motors, manufacturing issue, etc?

Thank you for your answers.

 

 

Edited August 27, 2020 by tarkanyigabor

[CraigT82]

Has it had the belt mod done to it?

[tarkanyigabor]

No, it is the original one. 

[newbie alert]

The quack noise at the end is from the stepper motors... without the belt mod it will sound like a rumble( bag of spanners)

[Tenor Viol]

What are you using to power it? Mains?

[tarkanyigabor]

14 hours ago, newbie alert said:

The quack noise at the end is from the stepper motors... without the belt mod it will sound like a rumble( bag of spanners)

Thank your for the reply. I was aware of this quack noise, the work of the motors was the suprise for me.

[tarkanyigabor]

14 hours ago, Tenor Viol said:

What are you using to power it? Mains?

I am using an 50 AH deep cycle AGM battery, I have double checked voltage and current values, but no issue there.