Quote:
Originally Posted by clf
I imagine these types would be a lot noisier than a tube motor (which until I read your post, I had never heard of!) It got me thinking of them - safety etc. With no engineering experience nor motor experience (except from model railway, scalextric and a rear sun blind) - could it be converted to a worm gear arrangement. Should it snap again, the worm gear would lock it in place? (and perhaps be a compromise on noise)
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The motor and all of its associated bits, is in a 45mm x 600mm -ish tube. That then fits inside what they call the barrel, the outer tube around 75mm x the width of the door. Tube motor and barrel are locked to together, driven against the fixed bracket at one end of the barrel, force of the drive being taken by the 3/8" shaft I mentioned earlier, designed to break on overload.
It seems to be a very good design, apart from this weakness in the design which allows the door to come crashing down if the deliberate weak part snaps. Both motor and manual winding system are disabled if this snaps, so until the new tube motor arrived and I had it installed, I had no way to open the door.