Technical, Techniques, Hints, and Tips > DC Motors (Brushed) and Speed Controllers

ESC help

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Grant:
Hi,

It's been 12 years since I last worked on my model boats. I'm currently trying to transfer some running gear and electrics/electronics from a tug that I've scratchbuilt to a 36" Perkasa. Problem is I've forgotten more than I ever knew! :-\

I've got an old Electronize (I think?) ESC which I rewired this morning to try out the motors in the tug before transferring them to the Perkasa but there seems to be a bit of a problem. The controller seems to power the motors in one direction only. even when I put the transmitter into reverse.

I have it wired as follows:
- Red/Black = Feed from battery to ESC
- Blue/White = Feed to motors from ESC
- Small Red/Black/White = reciever to ESC

A red LED lights up when I go into reverse but the motor still spins forward!

Anybody any ideas? ???

Look forward to speaking to you

Thanks

Grant

Doc:
Grant,
First thing that comes to mind is did the ESC have a reverse to start with?  The 'only runs in reverse' thingy could be servo reversing or the motors wired backwards.  A 'difinitive' answer?  Not by a long shot! - LOL
 - 'Doc

Grant:
Hi Doc,

I've just discovered (through much tappimg with a screwdriver where the 'windings' are) that it's now reversing intermittently with some 'sparking' involved. I guess it's just been that long that the contacts are slightly corroded/seized.

Thanks anyway

Grant ;)

Doc:
Grant,
With older pieces of equipment I've found that rather large hammers tend to work very well.  If tapping with those doesn't free-up stuck contacts, slightly harder tapping usually gives me an excuse to go buy another one.
I would never steer you wrong!  (maybe that's why they won't let me near any guidance systems?)
 - 'Doc

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