John,
For quick reference please note the following:-
The circuit as shown does work but the designer did publish a second revised circuit layout which is not shown on the web site.
The following changes were made:- Resistor R11 was changed from 10K to 4.7 K to slow down the tracking. This is a good move as it removes the irritation of the actuator winding every minute or so.
The next improvement was to install a manual switch to directly drive the actuator East or West - rather handy when setting up the system.
After I got this far I found my actuator would not work. After much head scratching I discovered that the limit switches in the actuator were the wrong type ( as I type I cannot remember which they were - but either NC or NO with just two connector tabs). As a result i installed an improved type of limit switch which had three connector tabs and could thus be wired for NC or NO.
The other important thing I did was to use PCB Express to design, build and purchase a circuit board to accommodate the majority of the electronics.
As for the relay wiring I have followed the original design exactly without a problem.
I have enclosed a photograph which shows my controller circuit and the relays.
Please contact me by PM or forum reply if you need more help. I should be able to scan and send you the updated schematic if you need it.
Whatever you do - don't give up.
Regards,
David in Hong Kong