DIY Electric Car Forums banner

1 - 6 of 6 Posts

·
Registered
Joined
·
70 Posts
Discussion Starter #1
I now know why no one is using a cheap pot. The 300=B0 turn needed to get =
full functionality is beyond simple mechanics. However I figured out a way=
on my ev motorcycle. I drilled a hole in a small piece of aluminum for th=
e cable. (must have a dongle at the end) Another for the pot shaft. It mu=
st be very close to the shaft hole. Then I made a groove around the alumin=
um piece. the groove shortens the distance around the aluminum piece. The=
n another hole for the spring attached with a bicycle cable. Another groov=
e around the aluminum. You must then wind the cables around the aluminum p=
iece. Works like a charm. The only trouble is finding a good spring. Th=
is will cost you less than ten bucks to put together. Lawrence Rhodes.....=
..

_______________________________________________
| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
| UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
| OTHER HELP: http://evdl.org/help/
| OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
 

·
Registered
Joined
·
70 Posts
Discussion Starter #2
Odd post, if you know why people don't use RS pots, then why do you use it.

They fail within a year in EV use, and it is not the thing you want to fail.



On Mon, Sep 27, 2010 at 3:42 PM, Lawrence Rhodes
<[email protected]> wrote:
> I now know why no one is using a cheap pot. The 300=B0 turn needed to =
get full functionality is beyond simple mechanics. However I figured out=
a way on my ev motorcycle. I drilled a hole in a small piece of aluminu=
m for the cable. (must have a dongle at the end) Another for the pot sha=
ft. It must be very close to the shaft hole. Then I made a groove aro=
und the aluminum piece. the groove shortens the distance around the alum=
inum piece. Then another hole for the spring attached with a bicycle cab=
le. Another groove around the aluminum. You must then wind the cables=
around the aluminum piece. Works like a charm. The only trouble is =
finding a good spring. This will cost you less than ten bucks to put tog=
ether. Lawrence Rhodes.......
>
> _______________________________________________
> | REPLYING: address your message to [email protected] only.
> | Multiple-address or CCed messages may be rejected.
> | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> | OTHER HELP: http://evdl.org/help/
> | OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
>



-- =

www.electric-lemon.com

_______________________________________________
| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
| UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
| OTHER HELP: http://evdl.org/help/
| OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
 

·
Registered
Joined
·
70 Posts
Discussion Starter #3
If no one uses them then how do you know they will fail in a year? I think the price is attractive. Has acceptable noise. The longer 300 degree throw means a smoother scale. It's the more complicated throw that seems to be the reason no one uses them. I just figured out a way around that. Lawrence Rhodes.........

_______________________________________________
| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
| UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
| OTHER HELP: http://evdl.org/help/
| OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
 

·
Registered
Joined
·
70 Posts
Discussion Starter #4
My friend used one, he's swapping it for automotive pot now. Plenty of
other converters have made the same mistake before you, it is a
frequent topic on this list. They die from vibration, dust and water
ingress.


By the way, you're the one who said no one is using them.....


On Tue, Sep 28, 2010 at 8:15 AM, Lawrence Rhodes
<[email protected]> wrote:
> If no one uses them then how do you know they will fail in a year? I t=
hink the price is attractive. Has acceptable noise. The longer 300 de=
gree throw means a smoother scale. It's the more complicated throw that =
seems to be the reason no one uses them. I just figured out a way around=
that. Lawrence Rhodes.........
>
> _______________________________________________
> | REPLYING: address your message to [email protected] only.
> | Multiple-address or CCed messages may be rejected.
> | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> | OTHER HELP: http://evdl.org/help/
> | OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
>



-- =

www.electric-lemon.com

_______________________________________________
| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
| UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
| OTHER HELP: http://evdl.org/help/
| OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
 

·
Registered
Joined
·
70 Posts
Discussion Starter #5
I used one for my go-kart, its a 300deg audio 0-5k volume control or
something.
I just fixed a lever on to it worked fine for testing, moving to a plunger
type now, with about 1.5" of travel.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.sjsu.edu/mailman/private/ev/attachments/20100928/0affd099/attachment.html
_______________________________________________
| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
| UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
| OTHER HELP: http://evdl.org/help/
| OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
 

·
Registered
Joined
·
70 Posts
Discussion Starter #6
Hi Lawrence,

Please let us know your opinion in a year or so.
Issue tends to be that you drive with the pot
mostly in the same area and every movement of
your foot (or handle) will mean that the wiper
will scrape one more time across the carbon layer.
After so many thousands of movements the carbon
is gone and the pot starts to disconnect (scratch)
instead of giving a smooth acceleration.
Depending on your driving style it may take longer
or shorter, just like some people wear their brakes
down after 20,000 miles and others still have life
left in them after 80,000.
Cheap pots usually also have a marginal carbon layer
so they fail much earlier than special designed
automotive pots, besides the (missing) protection
against dust and moisture.

It will be good to know your experience.
Regards,

Cor van de Water
Director HW & Systems Architecture Group
Proxim Wireless Corporation http://www.proxim.com
Email: [email protected] Private: http://www.cvandewater.com
Skype: cor_van_de_water IM: [email protected]
Tel: +1 408 383 7626 VoIP: +31 20 3987567 FWD# 25925
Tel: +91 (040)23117400 x203 XoIP: +31877841130

-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Lawrence Rhodes
Sent: Tuesday, September 28, 2010 8:45 PM
To: [email protected]
Subject: Re: [EVDL] 3 dollar Radio Shack pot.

If no one uses them then how do you know they will fail in a year? I
think the price is attractive. Has acceptable noise. The longer 300
degree throw means a smoother scale. It's the more complicated throw
that seems to be the reason no one uses them. I just figured out a way
around that. Lawrence Rhodes.........

_______________________________________________
| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
| UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
| OTHER HELP: http://evdl.org/help/
| OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev

_______________________________________________
| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
| UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
| OTHER HELP: http://evdl.org/help/
| OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
 
1 - 6 of 6 Posts
Top