[amsat-bb] Re: Rotator Positioning questions

Ing. Pavel Milanes Costa co7wt at frcuba.co.cu
Mon Aug 12 15:29:07 PDT 2013

I Greg, et all.

The rotor has a mechanical switch that cut the power to the motor when 
it's in contact with the switch:

So stopped motor is ZERO Current...

About 450 and beyond...

You are right, but last days I was thinking/tweaking an algorithm that I 
think now will do the math..

I will code it in this next days... You will know about it...

73 and thanks for your tips/comments.

El 10/08/13 02:23, Greg D escribió:
> I forget... Do these kinds of motors change their current draw
> significantly when they stall? If they don't, a current probe may not be
> a reliable stop indicator.
> Also, regarding the challenge with 450 degree rotation... There's no
> requirement that you actually use all 450 degrees. Just stick to 0-359
> and it will make things a lot easier to start with. Once it's all
> running, you can go for the fancy stuff.
> Good luck with the project,
> Greg KO6TH
> Ing. Pavel Milanes Costa wrote:
>> The "motor running/motor stop" signal will be a current probe on the
>> AC 24V motor feeding wires down the control, as when the motor reach
>> 0o or 450o it automatically switch's off

More information about the AMSAT-BB mailing list