Hi All
I have a question... after blowing a porter 5 and a porter 10 at 24v
I then called Steve at 4QD to ask for help. It seems that electronic noise was the problem that blew the boards. He asked if I had a resistor between the plus and minus o the motor. I didn't so I am a bit silly.

But is this the resistor I need? It was on the motor before I changed everything
Many thanks
Andy Moss

Hi Andy,

this is not a resistor but a thermal cutout switch. It's intended to trigger a cutout sequence when the motor overheats.

Are you sure he mentioned a resistor and not a diode?

P.S. Dan has a porter 10 for sale.

Thanks Karl.
I swear he said resistor. It is to stop power going back into the controller at high speed. That was the cause of the two controllers breaking.
The controllers have been repaired and are on there way back to me now.
So I need to make sure I don't have the same problem.
Andy

Hi Andy,

I can't see the use of a resistor across the + and - of the motor other than to drain current, which is of course a negative factor.

In your situation I would call 4QD again, but this time write down which item you require, not only the item but also the designation.

Av phun.

Karl.

Andyc5
Even better email them and get them to response so it is written down, therefore less errors. I find people consider their response more carefully if they are writing it.
Ray

Steve from 4qd is going to send me one out with my repaired boards. I shall see the what I get. But I googled electronic noise...and a capacitor or three is what I need to stop the noise. Thus not blowing up my controllers again.