Sent:	Thursday, January 12, 2012 11:10:36
From:	Mike Shuter (mike_shuter@sky.com)
Meade ETX 125 PE Electric Focuser
 
I decided to design & build my own focuser as it appears that Meade
don't make an electric focuser for their ETX125 telescope that has sales
support in Europe. I also looked into the reliability of alternative
devices and was not satisfied with the results.
 
My design has the following features: -
 
Max. Focus Screw Speed = 37 r.p.m
 
Controller provides speed variation of 0 to max. in both directions.
 
Joystick provides direction control with centre off position.
 
Motor control shows no detectable over-run when switching to off
position.
 
Power for the focuser is a 9v. battery contained within the handset and
accessed via a slide-off panel on underside.
 
The focuser gives smooth & reliable operation with no OTA shake.
Used with a CCD camera and a Bahtinov mask designed by Niels Noordhoek plus
"Bahtinov Grabber", the focuser gives fast accurate focusing.
 
For further information and supply please email me at mike_shuter@sky.com
 
Thanks for a great site, I've read it from top to bottom and still keep
re- reading.
 
Regards
 
Mike Shuter.

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