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 Posted - February 27 2009 : 09:42:47 AM
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well i found the perfect fit for putting a new motor in a power torque block. the block still needs machined with a dremel or die grinder, but it will clear the 6 wheel truck's center wheel. the only drawbak i seem to have is to much rpm. what can i use to lower the power that goes to the motor. it's spinning pretty fast with the tyco pack not even on the first click. with a good power pack this might not be an issue.
what can be used to reduce the power? is there anything that can be put in one of the wires in the engine to reduce the power that it gets?
when i get it all done, i'll post what the motor came from & what all is needed to do it. it turned out great.
jerry
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Posted - February 27 2009 : 10:39:23 AM
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I'd say you might have to just machine the block and reassemble everything, and you might be surprised. The job of the gears is to translate the motor's RPM into something more manageable; a stock PT motor will also scream at a ridiculous RPM with no load (no gears, etc). It's why the PT uses such a gigantic reduction gear, to get the axle RPMs down. Same applies with the CD motors used in that kitbash.
Of course "power" and "apparent speed" is all a relative term as discussed here, because I don't think anyone has ever measured these specs scientifically.
If speed and power is still a concern, you could wire a resistor inline before the armature. That would reduce the input voltage and thus the power going to the motor.
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Posted - February 27 2009 : 11:11:16 AM
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i did reassemble the truck. it will haul butt. how do you figure what resistor size it would need? it would seen it's getting about a 1/4 -1/3 more power than it needs.
jerry
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Posted - February 27 2009 : 11:22:49 AM
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The motor you have may be a 2-3 volt motor. A resistor as Tony suggested would be a good idea.
You may want to experiment with different Ohm resistors. I have one loco that runs well with a 75 ohm and another with 100 ohm and another with a 200 ohm.
I also find that a 12 volt light bulb across the track power (one wire to each truck) helps if you are using an old reostat power pack. these motors draw very small amounts of current and will run at full speed at the lowest throttle settings.
Ray
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Posted - February 27 2009 : 11:37:03 AM
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are resistors exspencive? if not i might just get fout or five & go from there.
thanks to both of you.
jerry
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Posted - February 27 2009 : 12:04:53 PM
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Resistors are inexpensive.
http://www.allelectronics.com/make-a-store/category/530/Resistors/1.html
Ray
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Posted - February 27 2009 : 9:05:18 PM
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i posted everrything in a new post in the Tyco Maintenance & Repair Shop. hope you enjoy.
jerry
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