The problem with screw drives
The Carriages wear out, they are high maintence (you really should clean and lubricate the drive shaft every 6 months or more if used more than 5 times a day. They almost alway seem to get noisier with time.
they do last longer than many other types of operators, but if you want quite hassle free operator that is not hard on your garage door, get one that has a DC motor. Most manufacturers of garage door openers carry at least one in their lineup and if a dealer says he don't stock it, wait and pay the extra money. Especially if you plan on living their a good while.
Sounds like your problem may be that the door section is triggering the down limit switch when it passes through the radius of the track. You may be able to trim the limit switch or the door depending on material door is made from. If headroom is tight this happens often. espcially if you have the operator arm in a very long position. The arm should be attached between the top rollers and near a strut or some type of reinforcement on the top section.
Ryan
Last edited by gdoorpro; 03-04-2008 at 12:24 AM.
Reason: more info
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