Re: Rotator question

David Redman

Look at the K3NG rotator controller

Lots of encoder options
I use AEAT 6012 12 bit absolute encoders with homebrew shaft mounts but other options are available
Az drive is homebrew , El drive heavy duty jackscrew.
Both encoders mounted on the rotating axis.
This is with an Arduino Mega 2560 and tracks my 3m dish to 0.1 degree positioning.
Park and stop limits fully define in software

I am not a software person and this was my first venture into Arduino but I got their with help from Doug G4DZU

If anybody wants further info then please contact me directly.


On Wed, 11 Dec 2019, 09:45 John Quarmby via Groups.Io, <> wrote:
I agree the mech end of it should be fairly straightforward, its
rebuilding the controller thats the more involved task, as I'm by no
means a software person. If I can find a suitable app (Arduino?) already
available that would help a lot - it needs 0.1 degree resolution
display, software settable end stops and offset, motor speed control for
start-stop, and RS232 or USB interfacing for PC control.


John G3XDY

On 11/12/2019 00:44, Chris Bartram G4DGU wrote:
> Hello John ('XDY, this time!)
> Fitting a shaft encoder into a '2051 shouldn't be a big problem. I've
> played with magnetic encoders while (too slowly ...) developing a new
> EME dish mount but I'm certain there would be no problem mechanically,
> with that rotator, providing the end-float problem was considered.
> I'm very happy - so far! - with the OE9PMJ az-el controller, but I'm
> sure that for a simple azimuth controller an Arduino based approach
> would be pretty simple to implement.
> 73
> Chris G4DGU
>> I have been using a Prosistel 2051 for nearly 10 years now and its
>> proved its worth. It fitted the existing Altron head unit with no
>> problem.  Like others I'm on about my third indicator pot and am
>> considering changing to an absolute encoder and rebuilding the
>> controller to suit, but that's not a simple task. I believe Prosistel
>> do now make a version with a shaft encoder with 0.1 degree
>> resolution. The PstRotatorAz software package from YO3DMU works well
>> too.

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