Use limit switches to avoid the necessity of using physical stops in the open and closed position. Each kit comes with a limit switch for the open and closed position, each. Two kits will be needed for dual carriage door openers.
This kit is easy to install - the cam slides on the drive shaft, and the limit installs in pre-drilled holes. It is also easy to adjust by turning the cam until the limit is in the desired position and tighten the screw. Because of its simple and effective design, the kit is totally reliable - it is impossible for the carriage door opener to physically miss its limit.
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