MötleyRöx

iTrader: (1)

Hi all...

I just set up my wiper type speed control on my old RC10T.
All new wiring, checked, double checked and triple checked... its good.
The resistor is brand new... there was a different one installed previously, but the one I just installed has never been used.
I've made sure the point has the appropriate pressure on the resistor.
I'm running a Tenergy NiMh 6cell 3800mah.

The resistor is getting ridiculously hot... hot enough that I could burn my finger if I left it there.

Is this normal?

joelwhite

iTrader: (62)

Been a long time since anybody had questions about a mechanical speedo! From memory they did get very hot.Most had a metal cage arout the ceramic element to protect things from burning.

OG RC 10T

iTrader: (41)

Spend a couple of $ and buy a esc. Its 2010 man!

OG RC 10T

iTrader: (41)

Yes they are in efficent, get abnormally hot and were never intended to have a NICAD battery over 1700mah - ish in them.

Your giving it to much power over to long of a duration of time.

JAMMINKRAZY

iTrader: (17)

+1

MötleyRöx

iTrader: (1)

Yep, I have brushless system. I'm experimenting.

But I'm a very vintage oriented guy... old houses, old motorcycles, old cars, old RC stuff

Don't be so concerned about what you think I should be running.

I'm not racing it... its just a toy, and I'm playing.

MötleyRöx

iTrader: (1)

It was actually about a minute of runtime at very slow speed... I was testing inside my office lobby at work.

This, I would think, would be when the resistor would be hottest, because it is doing its job of resisting.

3000mah is no different voltage than a 1700mah... only longer duration.
The battery is not particularly "stronger" or more "powerful".

MötleyRöx

iTrader: (1)

I don't believe the 10T came w/ such a resistor surrounded by a metal cage.
The resistor is directly above the servo... I do have concerns that I could melt the servo. Especially, since its barely touching it. I've tried to position it so it does not, but there is just not that much adjustment.

Mac The Knife

iTrader: (33)

What motor are you using?

MötleyRöx

iTrader: (1)

Its an old Green Machine 2.
I also have a stock Reedy Mr Outlaw... still need to solder the connection on.

Both are 27 turn.

JAMMINKRAZY

iTrader: (17)

Fair enough.

K_Spec_RC

iTrader: (8)

Were you going half throttle a lot of the time? I know that in slot car controlelrs that can heat up and burn out the resistor. I dont know if the same is true for MSC's though.

MötleyRöx

iTrader: (1)

Never full throttle while I was testing it.
I have not been able to really run it yet.

I wasn't even really half throttle.

Only ran for about a minute or 2... total run time was probably less than that.

I've never run an old wiper type... so I didn't want to fireball the truck without checking to see if this is at least "normal".

MötleyRöx

iTrader: (1)

Thanks for understanding... I sometimes get the same type of remarks asking why I ride an old Honda 350four. But, they all come from Harley riders, go figure.

AreCee

iTrader: (1)

Yes, the ceramic resistor is supposed to get hot, very hot.

I assume it's a 3 step MSC. Step one about 1/4 to 1/3 of the voltage gets to the motor, the rest to the resistor. Step 2 about 1/2 to 2/3 volts go to motor, rest to resistor. Step 3 all voltage goes to motor, none to the resistor. So the coolest time for the resistor is WOT.