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Old 02-27-2010 | 11:56 PM
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opjose
 
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From: Poolesville, MD
Default RE: overheating esc?

ORIGINAL: maxmax77

opjose; thanks. I took off the heat SHRINK awhile ago, and made sure all connections were good-they were. I had those bullet connectors on my connections before, but I heard that heat SHRINK was better guess I screwed up there!
Heat SHRINK tubing does not provide for continuity between two points. Somehow the wires must be joined UNDER the heat shrink tubing.

This can be done by soldering the wires together ( after sliding a bit of tubing down so you later can move it up over the solder and heat the tubing to guard the solder joints ), or by soldering bullet connectors to the ends of the wires, putting heat shrink over the connectors and joining the connectors... The latter is how it is usually done.



ORIGINAL: maxmax77

ok, just want to make sure I understand this. I get that you want me to disconnect the esc and BL motor, but after that I'm not sure...do you want me to put the + and - wires of a battery tester on the esc/motor wires? And when you say ''If you fail to get continuity you've found the problem'' do you mean if I fail to get current I've found the problem? I'm not a really technical guy, so excuse me if I sound stupid here


thanks
-Max
Sorry you started off talking about Mosfets, etc. which indicated to me a knowledge of electrical circuitry and components.

What you need to do is to use a meter to be sure that you can get a signal from point A to point B.
Doing so establishes that the wiring and connectors between points A and B are all good.

So to use a CRUDE ascii diagram...



||||||||+______||||||||||||A_____[<_____A|||||||
||LiPo||............||| ESC ||B______[<____ B||Motor
||||||||-______||||||||||||C______[<_____C|||||||


The "[" represents the female bullet connector, the "<" represents the male connector. Underscores are wires. Periods don't exist.
Both should be soldered to their respective wires.

To check continuity, you would press a probe from the meter with the LiPo DISCONNECTED ( it doesn't matter if the probe is positive or negative ) to point "A" on the ESC and point "A" where the wire is soldered into the motor itself.

If you get low resistance then current CAN flow between the two points when the motor is running.

The same with all of the others.

Heat shrink ALONE cannot be used to hold wires in contact with each other, etc.
You need a GOOD and permanent electrical connection.

BTW: remember that BEFORE you solder anything in place you typically have to put heat shrink further down onto the wire, where it will NOT get HOT.

Once you have the joints soldered you move the tubing back, and heat the tubing with a heat gun ( not hair dryer ), to get it to cover the soldered areas... but the soldering job itself must first be good!

If you haven't done this sort of thing before ( which it sounds like you haven't ) get some help if possible from other club members.
It pays to have someone guide you through all of this the first time you do anything.