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Do-It-Yourself (DIY) Question & Answer Forum
Roller Shutter Door Safety Cutouts?
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<blockquote data-quote="Marvo" data-source="post: 305071" data-attributes="member: 20838"><p>If it's a mechanical type cable then, as Steve says, more likely either to drop the shutter quickly in an emergency or to manually raise in case of power fail. I wouldn't worry about the motor getting warm as long as it doesn't get too hot to keep your hand on it or doesn't start smelling like hot plastic / varnish. These types of motors are often only rated to low duty operation such as 10 cycles per hour or a small percentage of operating time so if you run it several times in quick succession it will heat up quickly. I'd ask the owner for the user documentation or the company details of the installers, these domestic shutters are fiddly to work on at best, I've seen them use phase angle monitoring for safety and limit sensing, also some use a tacometer/basic rotary encoder to establish limits.</p></blockquote><p></p>
[QUOTE="Marvo, post: 305071, member: 20838"] If it's a mechanical type cable then, as Steve says, more likely either to drop the shutter quickly in an emergency or to manually raise in case of power fail. I wouldn't worry about the motor getting warm as long as it doesn't get too hot to keep your hand on it or doesn't start smelling like hot plastic / varnish. These types of motors are often only rated to low duty operation such as 10 cycles per hour or a small percentage of operating time so if you run it several times in quick succession it will heat up quickly. I'd ask the owner for the user documentation or the company details of the installers, these domestic shutters are fiddly to work on at best, I've seen them use phase angle monitoring for safety and limit sensing, also some use a tacometer/basic rotary encoder to establish limits. [/QUOTE]
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Roller Shutter Door Safety Cutouts?
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