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Old 05-18-2006, 10:50 PM   #61
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Haven't been to the thread for a while.

-Yes, magnets are "like a glass of water". Once it is competelly full it can accept no more. The biggest problem is being able to accuratelly determine this (as axplained previously).

-Unfortunatelly, I think you can hurt (read-change into many smaller magnets a magnet with a field too intense. Check out "Quarter Shrinking" online. It is absolutelly scary, and I would never recoment anyone do this because they take things to an extreme. I'm not sure, but it may be applicable to our magnet material as well.

-Timmay70. Couldn't really follow your post, but yes it is possible to change the motors timing by moving the magnetic field about. The probelm is that it is usually not the best option, because in many cases it is detrimental to the efficiency of the motor and will make them run hotter. The best options are rotating the endbell, and or using a timed brush.-Jeff
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Old 05-18-2006, 10:56 PM   #62
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Quote:
Originally Posted by timmay70
Since we have the magentic gurus on the line I got a question... Is there the possibility to have north and south magentic poles with the possibility to either make one pole stronger than the other? Cancell out the opposite pole because there was either a seperation between the magnets and the fields were so close to each other? Move the concentration of the pole, thus magnetically changing the timing of the motor... I know that this has been tried, I witnessed it, but may have been done incorrectly, and with inferior equipment...

thanks.
You could make one magnet stronger than the other. Usually they are anyways on most motors, but not enough to make a difference.

However you would almost need to remove one of the magnets and make a special jig to zap them one at a time.

No two magnets are the same so when you zap both magnets in a can to their 100% potential that doesn't mean they are equal just that they are as strong as they can possibly be. One magnet usually reads higher with a gauss or tesla meter.

As for changing the timing with a magnet zapper. Yes its fairly simple and can be done. However I know the florida series and some of the big races have already banned the use of the technique. I was told they are no requiring the center of the magnetic field of both magnets to be in the center + or - a given amount.

In testing though, increasing the timing on a motor via changing the magnetic field hasn't really been of benefit. The only place where it seemed to be an advantage was in some of the 0 timing spec oval classes. In touring applications it just makes the motor run that much hotter and although it may gain you a tenth up front most people will lose 2-3 tenths in the last couple of minutes in the race.

Michael
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Old 05-18-2006, 11:18 PM   #63
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Quote:
Originally Posted by Jay Dub
-Unfortunatelly, I think you can hurt (read-change into many smaller magnets a magnet with a field too intense. Check out "Quarter Shrinking" online. It is absolutelly scary, and I would never recoment anyone do this because they take things to an extreme. I'm not sure, but it may be applicable to our magnet material as well.
Jeff
Jeff,

Anything is possible, I think in the realm of toy car motors I don't see anyone building anything big enough to put out that kind of magnetic field.

If they do well I hope they have a will and insurance. lol

We've tested WELL over the threashold to fully zap a magnet with equipment the size of a small room and the only thing that happened was in one case a magnet broke loose from the can.

Then again we don't go to the extreme's that quarter shrinkers do though... lol I hate winding coils that often
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Old 05-18-2006, 11:25 PM   #64
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Michael: What would happen if I mistakenly zapped a finger or any part of the body that can fit. I few of my friends have ask that question, but didn't know what to say.
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Old 05-18-2006, 11:45 PM   #65
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well as long as you don't have metal in your finger you should be ok.

I still think its funny when guys "cover up" when using the zapper for the first time LMAO I won't name names but you know who you are LOL
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Old 05-19-2006, 05:44 AM   #66
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Thanks, tempest... very informative.

As far as changing the timing issue... that was the same results that we saw back in the day.. When Cleveland used green epoxy to mark the endbell tabs... I guess that our zapper back then may have actually done something... we still don't know what.

At least I know where to look if I'm ever in the market for a zapper.
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Old 05-20-2006, 08:55 PM   #67
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Quote:
Originally Posted by Jay Dub
-Unfortunatelly, I think you can hurt (read-change into many smaller magnets a magnet with a field too intense. Check out "Quarter Shrinking" online. It is absolutelly scary, and I would never recoment anyone do this because they take things to an extreme. I'm not sure, but it may be applicable to our magnet material as well.
LMAO!!!
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