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udayr
12-16-2008, 12:27 AM
We are tryin to use a solenoid for a gripper mechanism in an arm…for making the solenoid …we are wounding the copper wire of 150 turns around the nut and blot and supply is given frm 12v 1 amp battery..thickness is .1mm90 (wire used in fan motor).But when the supply is given the wire is getting burnt off...could u guys help me out with this problem

alva
12-16-2008, 01:33 AM
not so sure myself ...

but I think your problem might be due to duty cycle of the solenoid winding. If you keep the solenoid on for extended periods of time (over a few secs) the wire is more likely to burn off.

http://www.solenoidcity.com/solenoid/manual/selection/selectionfactors.htm?submit4=Selection+Factors

I might be wrong, but I don't think the wire you are using is meant for 100% duty cycle even at such low voltages...

Try increasing the no. of turns - more resistance would imply less heating of the wire and would also reduce the energy drained by the arm.

A noob method would be to use a thicker wire I guess.
(that would be the first thing I would try out)

Regards
Alva

MohitM
12-16-2008, 12:33 PM
You ARE using insulated copper wire?.. Sorry if this sounds stupid.

udayr
12-16-2008, 10:43 PM
I had connected 4 similar solenoids in parllel then also its happenin the same.

tpsbpl
01-11-2009, 06:21 PM
may this link help you to calculate resistance and power of your coil
http://geocities.com/tpsbpl/swg_awg_calculator.htm
also try to use 30swg 250Turns :)