Thumb throttle?

[martinko]

Could anybody comment on the goldenmotor-thumb throttle please?
I have experience with a twist throttle and I find it find it awful on longer distances, yet I think a thumb throttle could be even worse :-(

Martin.

[ahend]

I disliked my twist throttle from the beginning so I converted it to a paddle. The paddle is positioned such that at full throttle, my thumb rests across it in a relaxed state. I also feel I have more control over the bike as I'm grabbing my solid handle bar instead of a plastic barrel. It was well worth the effort of conversion.






Andy

[bumper]

I'm looking for a thumb throttle that is compatible with the 36v brushless GM kit.  I asked for thumb and they sent me the twist . Any suggestions? Preferably cheap. Thanks in advance.

[ahend]

Others have found that if you cut the twist throttle down to just a stub, say ¾ of an inch or so, that it is quite comfortable, although still not a thumb throttle. Check on eBay, there are always some available there. Look for one with a hall sensor output and a 36v LED charge indicator.

[tartosuc]

Others have found that if you cut the twist throttle down to just a stub, say ¾ of an inch or so, that it is quite comfortable, although still not a thumb throttle. Check on eBay, there are always some available there. Look for one with a hall sensor output and a 36v LED charge indicator.

so  the trottle part is only at the inside end of it?..cool

i think I will cut mine and make it like a twist shifer

[bumper]

Will this work?

http://cgi.ebay.com/Thumb-throttle-cable-with-36V-LED-battery-Status_W0QQitemZ260239016071QQihZ016QQcategoryZ11332QQcmdZViewItemQQ_trksidZp1742.m153.l1262

[ahend]

Will this work?

Yes, that will work. The max output is listed at 4.3 volts and that is consistent with what I found a full throttle to supply. If you get up much higher in speed control voltage, the controller cuts out, I'm not sure why.

[ahend]

i think I will cut mine and make it like a twist shifer

Quite, cut away! The chrome plated plastic end cap comes off with a screw accessed through the barrel bore. After removing it, slip the rubber grip off so you can cut it cleanly with shears or a razor to match your new barrel stub length. The barrel is best cut with a hacksaw and then squared up with a bit of filing.

Post some pics of how it turns out.

[Lanchon]

> If you get up much higher in speed control voltage, the controller cuts out, I'm not sure why.

if that's true, I'd guess it's an attempt to detect a short between power and output or an open ground; both situations would otherwise trigger max power output.

[ahend]

If you get up much higher in speed control voltage, the controller cuts out, I'm not sure why.

I may be all wet on this point. This action was noticed while working on a microprocessor circuit to enslave the throttle. My micro was reading both the throttle output and a pot adjusted voltage divider tap using an onboard analog to digital converter. I then added the two voltage readings together and sent out a signal of that magnitude to the controller. When adjusting the pot, I found that the controller would cut out if I turned it up too high.

Thinking about it now I'm quite sure that what happened was the total value from my addition exceeded the 8 bit register holding the sum. This would cause it to overflow and roll over to zero, thus causing the micro to send 0 volts to the controller.

Well... I'm glad I thought that through. Please disregard that statement.