This same thing has happen to me several times about 5 years ago, and fix =
it, so it would not happen again.
At first, I thought the spring on the Curtis pot was getting weak or may no=
t =
be strong enough, so I rotated it a little and fasten it down with a small =
steel aircraft wire clamp using one of the cover screws.
This work for some years, until it did it again, so maybe the carbon pot =
wiper was leaving a carbon trail on the pot, so I clean it with some =
electronics spray cleaner and also lubricate the throttle cable with a dry =
type silicon.
This also work for a long time, until it act up again. This time I change =
the pot with a spare one I have in stock. The old one look good, so I kept =
it as a spare.
Again, some time later, it did it again. So I got out the Zilla manual and =
check the voltages that go to the pot and they are right in specifications. =
It seems every time I touch the pot or work on it, it would work again for =
a =
while.
Then one time, I went into town and park the EV, came back out and the EV =
would not start up. The precharge light would not come on, and I recycle =
the ignition key several times, check all the 12 volts voltages and check t=
o =
see if the battery voltage is at the main contactor before before it was =
close.
If you do not have the battery voltage at the main contactor, then you will =
not get a precharge, but I had that voltage there.
So I now had the EV tow to my shop and it started to work again. It again =
fix it self by just touching it.
Again I went to a Caf=E9 and it did the same thing, but this time for some =
reason I look down at the accelerator peddle and the floor mat was laying o=
n =
top of it, which means the accelerator pot did not go below the ohms =
required for the motor to start and the controller will not start up unless =
you are below a minimum resistance.
So to start up the EV, all I had to do was pull the floor mat back a little =
and I never had any problem after that.
Roland
Roland
----- Original Message ----- =
From: "m gol" <[email protected]>
To: <[email protected]>
Sent: Saturday, September 08, 2007 10:46 AM
Subject: [EVDL] pot pedal going bad?
> I have one of those "gas pedals" that is a 0-5K pot.
>
> I have a light bulb as a precharge resistor.
>
> A few times I have turned the light-bulb on and it did not go out.
>
> So I started the circuit anyway, and the motor went on without any
> depression on the pedal.
>
> Then I would press the pedal, and release and the motor would stop.
>
> Any ideas?
>
> Thanks
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
> =
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
it, so it would not happen again.
At first, I thought the spring on the Curtis pot was getting weak or may no=
t =
be strong enough, so I rotated it a little and fasten it down with a small =
steel aircraft wire clamp using one of the cover screws.
This work for some years, until it did it again, so maybe the carbon pot =
wiper was leaving a carbon trail on the pot, so I clean it with some =
electronics spray cleaner and also lubricate the throttle cable with a dry =
type silicon.
This also work for a long time, until it act up again. This time I change =
the pot with a spare one I have in stock. The old one look good, so I kept =
it as a spare.
Again, some time later, it did it again. So I got out the Zilla manual and =
check the voltages that go to the pot and they are right in specifications. =
It seems every time I touch the pot or work on it, it would work again for =
a =
while.
Then one time, I went into town and park the EV, came back out and the EV =
would not start up. The precharge light would not come on, and I recycle =
the ignition key several times, check all the 12 volts voltages and check t=
o =
see if the battery voltage is at the main contactor before before it was =
close.
If you do not have the battery voltage at the main contactor, then you will =
not get a precharge, but I had that voltage there.
So I now had the EV tow to my shop and it started to work again. It again =
fix it self by just touching it.
Again I went to a Caf=E9 and it did the same thing, but this time for some =
reason I look down at the accelerator peddle and the floor mat was laying o=
n =
top of it, which means the accelerator pot did not go below the ohms =
required for the motor to start and the controller will not start up unless =
you are below a minimum resistance.
So to start up the EV, all I had to do was pull the floor mat back a little =
and I never had any problem after that.
Roland
Roland
----- Original Message ----- =
From: "m gol" <[email protected]>
To: <[email protected]>
Sent: Saturday, September 08, 2007 10:46 AM
Subject: [EVDL] pot pedal going bad?
> I have one of those "gas pedals" that is a 0-5K pot.
>
> I have a light bulb as a precharge resistor.
>
> A few times I have turned the light-bulb on and it did not go out.
>
> So I started the circuit anyway, and the motor went on without any
> depression on the pedal.
>
> Then I would press the pedal, and release and the motor would stop.
>
> Any ideas?
>
> Thanks
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
> =
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
