MCC & Cars

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Problem with Reedcontacts

Posted by Steffen Schlag on 2013-01-03 22:33 Germany

Hello.
I have a problem with the reed contacts. On some reed contacts the steering of the cars with the magnet push up and the car loose control. Changing the contacts of the reed at the SWDEC has no effect.
I use magnetic band, Ucci and Om32 serial.
I hope somebody can help me.

Kind regards.

Steffen

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Posted by Leon van Perlo on 2013-01-04 09:01 Netherlands

Hi Steffen,

Strange effect. It seems to me that it is magnetic problem en not electrical. Currents through the reed-contacts are so small, they cannot cause any substantial magnetic field.
Can you describe exactly which reed-contacts you use and how you mounted them in relation to the magnetic strip, so we may reproduce the problem?

Kind regards,
Leon

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Posted by Heinz Cox on 2013-01-04 10:44 Netherlands

Hi Steffen,

This is a magnetic problem.
Did you mount the reed-contacts against the magnetic tape?
What sometimes wants to help, is turning the steeringmagnet in the direction the front and behind.
If we have your responce, I will further delve into the problem.

Kind regards,
Heinz

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Posted by Steffen Schlag on 2013-01-04 12:59 Germany

Hi Leon,
Hi Heinz,
Thanks for your quick response!!
Indeed it is a magnetical problem.

I glue the reeds direct under the magnetic tape.
Reeds are Meeder 7-B B9.

I solved it using a few neodym magnets and putt them on the magnetic tape direct over the reed contact.
It is strange fro me, but it seems that the reed contact "reset" himself.

Kind regards
Steffen

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