Gallery, Projects and General > How do I??

Help with a big roller shutter

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Will_D:
Hi guys, our tractor shed has a bigish roller shutter. Normally goes up and down using the key-switch.

Not any more!

Started to not go all the way down, initially a 30 mm gap, then 60 then more like 90.

Thought at first there would be some obvious micro-switches but none that I can see.

Before we call in the company I would like it to close [Public Hols in .ie tomorrow]. So I have the long pole with the hook on the end but it just turns without lowering the shutter.

Is there some trick to using the manual backup system?

Cheers

Will, Malahide RFC

awemawson:
On mine you hook the long pole on and yank it to engage the mechanism before turning it

Pete.:
A few weeks ago I ripped out four large (and nearly new) roller shutters. 7m long the biggest one. I don't recall them having limit switches, but the control boxes did have timer relays.

Will_D:
Thanks guys, will give it a good yank later today!

Timer relays and probably a current limit cut out?

Muzzerboy:
I've got a roller door on my workshop which I fitted myself. Like most of the available systems, it has limit switches to control the open and closed movement. They are enclosed within the drive mechanism itself, at one end of the roller mechanism. During commissioning, you set the open and closed positions. There is also some form of detection to protect against squashing people and things, based on detecting bodies rather than current overload. The manual hand crank system simply relies on your judgement to determine when the door is open or closed sufficiently.

Of course, the system in the OP sounds older and more industrial, so the operation may be completely different. Presumably you could look up the make / model of the actual system online?

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