Model Forum / Radio Controlled / Water Models / May 2008

Do you have instructions for this ESC? I am concerned about the motor
that you have in it, if memory serves me I think that that is rated for
nothing bigger than a 540 motor. That will not give you your current
problem, but it would heat up and burn out the ESC.
Things to look at, what is the transmitter that is being used? Do you
have the trim pots on the transmitter set to neutral?
If you get a slow speed and then fast speed while trying to go
forward I am thinking the following:
1) Is the motor too big, is it drawing too much from the speed
control that you are actually getting slow where there should be 50%
and full where it should be 100% out put? Take a smaller motor (
400-540) and connect it to the out put leads from the ESC without
altering anything else. If you get variable speed with the other motor,
then there is an incompatability with the motor/ESC set up.
2) Is the ESC used? I have had two car ESC's fail on me where I had
partial control forward and only full speed in reverse. This is very
common ( well not really common, but happens when you burn out a relay
on the reverse settings of a ESC that utilizes a relay for forward to
reverse), when you have a ESC that utilizes a relay to change from
forward to reverse. The relay is a little black box, usually setting
next to the voltage regularotors ( mosfets). It should make a "click"
when you shift from forward to reverse. If you have one of these, check
to see if there is power through it utilizing a voltmeter. It should
produce a constant out put voltage in either forward or reverse.
These are my two most obvious answers.

--
Tachikaze

Tachikaze
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Hi,
Many Moons later I had this problem which the advice taught me well.
Some where along the way the boat I had with this unit got old and th
speed controller mentioned in this forum was cut out by one of m
friends,
I now have a use for this Controller and can not remember which wire
went where.
Is there any one out there who could help;
I have two wires joined together Pink & Cream and two other wires  Blu
& Red
which ones are the motor ?
Any help would really help me out

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waterboa