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Old May 19th, 2006, 06:47 PM   #1
pdelno
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electromagnets

i was woundering if any body here has used electromagnets in any projects.
i have a idea about using some for a project and can't really find any of the info i need.
if anybody has info on them. like controling them and manipulating the force of the magnets. I know this is off the plc topic but it might get there.
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Old May 19th, 2006, 07:14 PM   #2
Archie
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I worked with a machine that used small ones. A disc brake pad would slide onto the magnets, they would energize, then the arm would turn the pad upside down over a conveyor. The magnets would de-energize to drop the pad on the conveyor.

It was a very simple on/off application with 24VDC magnets.
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Old May 19th, 2006, 07:47 PM   #3
dalem
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I've used the following peoples magnets. http://www.magnetics.com/I've also ordered elect magnets out of McMaster Carr. Probably a cheaper route for experimenting.
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Old May 19th, 2006, 08:14 PM   #4
keithkyll
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Some info about them here, including a schematic:

http://www.plctalk.net/qanda/showthr...=electromagnet
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Old May 19th, 2006, 09:51 PM   #5
jstolaruk
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Have used them a few times but they also attract metal shavings and grinding dust that don't want to fall off when the magnets are deenergized (residual) so they end up being a maintenance issue. Generally we stay away from them.
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Old May 19th, 2006, 10:17 PM   #6
pdelno
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thanks guys

dalem that was what i was looking for
i think they may have what i want
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Old May 19th, 2006, 10:23 PM   #7
pdelno
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jstolaruk we weld blanks togeather with lasers so fairly clean. right now there are suction cups the crowd the 2 blanks togeather. there is a lot of oil on the parts which gets into the vac system and causes a lot of problems. there fix right now is to sandblast the cups but that messes up the sealing surface. i was thinks of using small magnets the replace the suction cups.

thanks agian guys
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