barryporteous

Thank you for your comments I have asked Barrie to ring you as I believe he has your number I hope this will help. Oh just one other thing - while you are on to him could you let him let him have the stamped numbers on the wheels. - Thanks

What was you eventual solution concerning the wormwheel - did you have to modify it?

I have my work cut out I think!!

I would be very interested to hear the history here! It looks like it has been in the wars! I took over making worms and wheels for Beacon Hill 3 years ago and am surprised at the image above. It is probably old history but I will try to find out more about it. All worms I make have chamfered edges, I must admit it may be an old or prototype one. Is the worm brass or stainless steel? The current worms look like below.

I have just read this thread with interest and maybe too late to be of any help. I work for Beacon Hill Telescopes making worms, wheels and simple bespoke drive systems. The odd number of 287 teeth goes back to the days of synchronous mains motors with a 3000:1 gearbox giving 0.2 RPM to the worm turning once in 5 minutes (300s) X 287 = 86100 seconds per rev. 64 seconds short of one day. Near enough for most applications. Of course steppers and servos are used more these days. We are still very much alive and kicking!

I know this is and old thread but I have a version of EQMOD with a "lock the pier" checkbox. I think it came from someone in the Ukraine