Arduino Help

[bluemaxroe]

Can you tell I don't really want to use a premade gearbox?

[bluemaxroe]

Ok I have had more thoughts.  If I have a worm gear turning a 12 tooth cog which in turn...turns the 120 tooth cog that would mean I have 1,536,000 X 10 pulses per revolution.   Giving a pulse per second number of 178.26.

that should work.   Really though...without Dec guiding I really really think the coarseness of my gear ratio is far less important than accurate polar alignment.    

 

Do do we agree this gearing should be adequate?   

 

[John78]

The gear ratios for skywatcher mounts are here....

https://www.astroeq.co.uk/tutorials.php?link=/doku/doku.php?id=ratios

I use an EQ5 so have 144:1 worm, but I changed to a 1.8deg per step stepper and about 3:1 belt drive reduction and that works fine.

[bluemaxroe]

Chosen my motor and it's here!

[bluemaxroe]

Slowly slowly....worm gear and cog have arrived.