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Electronic shifting system



 
 
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  #1  
Old August 6th 07, 08:24 PM posted to rec.bicycles.racing,rec.bicycles.tech
[email protected]
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Posts: 156
Default Electronic shifting system

Campagnolo had a prototype of it's electronic shifting system. The
problem however is that they have chosen to use the solenoid as the
primary driving mechanism. The same goes for Shimano as well. Mavic's
Mektronic used the dérailleur pulley to drive a worm gear thus saving
weight. Both Shimano and Campagnlo's shifting system requires a very
large battery.

The really big issue is if these shifting systems will withstand a
immersion test. This requirement seems a bit extreme, but there are
occasions when I am riding and you have go through a very deep puddle
with no other way to go around.

Ads
  #4  
Old August 8th 07, 04:51 AM posted to rec.bicycles.racing,rec.bicycles.tech
jim beam
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Posts: 5,758
Default Electronic shifting system

Tom Kunich wrote:
"jim beam" wrote in message
t...
wrote:
Campagnolo had a prototype of it's electronic shifting system. The
problem however is that they have chosen to use the solenoid as the
primary driving mechanism. The same goes for Shimano as well. Mavic's
Mektronic used the d?railleur pulley to drive a worm gear thus saving
weight.

interesting.


The Mavic system was handicapped by the mechanism. All it takes is a strong
jolt and the clutches lift and the bike shifts somewhere on it's own.

The other methods probably use stepping motors with leadscrews to give very
precise and reliable position sensitive shifting. The problem is that they
use quite a bit of power.

I'm still trying to figure out what the advantages are to electric shifting.
Anyone got any suggestions? True that if you have electronic shifting you
can shift even if you're a weak kneed shifty eyed moron - say like Kyle,
Howard, Carmine or datakoll. But for anyone with the coordination of a skunk
sprayed squirrel Ergo or STI has no drawbacks aside from those huge lever
bases.


i see the advantage as having the potential to be self-adjusting.
whether it actually does this or not is another matter. but if the
theoretical advantages were achieved, and precision shifting achievable
every time, i think it would be a great thing.
  #5  
Old August 8th 07, 05:20 AM posted to rec.bicycles.racing,rec.bicycles.tech
Howard Kveck
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Posts: 3,549
Default Electronic shifting system

In article .net,
"Tom Kunich" cyclintom@yahoo. com wrote:

I'm still trying to figure out what the advantages are to electric shifting.
Anyone got any suggestions? True that if you have electronic shifting you
can shift even if you're a weak kneed shifty eyed moron - say like Kyle,
Howard, Carmine or datakoll.


Oh, you mean weak kneed shifty eyed morons - say like Tony Rominger or Chris
Boardman?

--
tanx,
Howard

Never take a tenant with a monkey.

remove YOUR SHOES to reply, ok?
  #6  
Old August 8th 07, 09:00 AM posted to rec.bicycles.racing,rec.bicycles.tech
Donald Munro
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Posts: 4,811
Default Electronic shifting system

jim beam wrote:
i see the advantage as having the potential to be self-adjusting.
whether it actually does this or not is another matter. but if the
theoretical advantages were achieved, and precision shifting achievable
every time, i think it would be a great thing.


I can't wait to write a virus for the self-adjusting software.

  #7  
Old August 8th 07, 09:58 AM posted to rec.bicycles.racing,rec.bicycles.tech
[email protected]
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Posts: 156
Default Electronic shifting system

On Aug 7, 7:21 pm, "Tom Kunich" cyclintom@yahoo. com wrote:
"jim beam" wrote in message

t...

wrote:
Campagnolo had a prototype of it's electronic shifting system. The
problem however is that they have chosen to use the solenoid as the
primary driving mechanism. The same goes for Shimano as well. Mavic's
Mektronic used the d?railleur pulley to drive a worm gear thus saving
weight.


interesting.


The only problem I heard of was the radio frequency interference
problem on rare occasions One complaint had was that the solenoid was
not replaceable.


The Mavic system was handicapped by the mechanism. All it takes is a strong
jolt and the clutches lift and the bike shifts somewhere on it's own.

The other methods probably use stepping motors with leadscrews to give very
precise and reliable position sensitive shifting. The problem is that they
use quite a bit of power.

I'm still trying to figure out what the advantages are to electric shifting.
Anyone got any suggestions? True that if you have electronic shifting you
can shift even if you're a weak kneed shifty eyed moron - say like Kyle,
Howard, Carmine or datakoll. But for anyone with the coordination of a skunk
sprayed squirrel Ergo or STI has no drawbacks aside from those huge lever
bases.



  #8  
Old August 8th 07, 01:51 PM posted to rec.bicycles.racing,rec.bicycles.tech
jim beam
external usenet poster
 
Posts: 5,758
Default Electronic shifting system

Donald Munro wrote:
jim beam wrote:
i see the advantage as having the potential to be self-adjusting.
whether it actually does this or not is another matter. but if the
theoretical advantages were achieved, and precision shifting achievable
every time, i think it would be a great thing.


I can't wait to write a virus for the self-adjusting software.

do you write viruses for cnc machines?
  #9  
Old August 8th 07, 01:53 PM posted to rec.bicycles.racing,rec.bicycles.tech
Qui si parla Campagnolo-www.vecchios.com Qui si parla Campagnolo-www.vecchios.com is offline
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First recorded activity by CycleBanter: Jul 2006
Posts: 933
Default Electronic shifting system

On Aug 7, 8:21 pm, "Tom Kunich" cyclintom@yahoo. com wrote:
"jim beam" wrote in message

t...

wrote:
Campagnolo had a prototype of it's electronic shifting system. The
problem however is that they have chosen to use the solenoid as the
primary driving mechanism. The same goes for Shimano as well. Mavic's
Mektronic used the d?railleur pulley to drive a worm gear thus saving
weight.


interesting.


The Mavic system was handicapped by the mechanism. All it takes is a strong
jolt and the clutches lift and the bike shifts somewhere on it's own.

The other methods probably use stepping motors with leadscrews to give very
precise and reliable position sensitive shifting. The problem is that they
use quite a bit of power.

I'm still trying to figure out what the advantages are to electric shifting.
Anyone got any suggestions? True that if you have electronic shifting you
can shift even if you're a weak kneed shifty eyed moron - say like Kyle,
Howard, Carmine or datakoll. But for anyone with the coordination of a skunk
sprayed squirrel Ergo or STI has no drawbacks aside from those huge lever
bases.


Like I asked a shimano clone at Interbike, pointing to a particularly
goofy FD setup, "what's that for?", I ask.."For selling" he answers.

Like disc brakes on road bikes, tubeless, threadless, compact frames,
oversized handlebars, etc....many will say what an improvement these
things all are but mostly they are for 'selling'.

  #10  
Old August 8th 07, 02:02 PM posted to rec.bicycles.racing,rec.bicycles.tech
jim beam
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Posts: 5,758
Default Electronic shifting system

Qui si parla Campagnolo-www.vecchios.com wrote:
On Aug 7, 8:21 pm, "Tom Kunich" cyclintom@yahoo. com wrote:
"jim beam" wrote in message

t...

wrote:
Campagnolo had a prototype of it's electronic shifting system. The
problem however is that they have chosen to use the solenoid as the
primary driving mechanism. The same goes for Shimano as well. Mavic's
Mektronic used the d?railleur pulley to drive a worm gear thus saving
weight.
interesting.

The Mavic system was handicapped by the mechanism. All it takes is a strong
jolt and the clutches lift and the bike shifts somewhere on it's own.

The other methods probably use stepping motors with leadscrews to give very
precise and reliable position sensitive shifting. The problem is that they
use quite a bit of power.

I'm still trying to figure out what the advantages are to electric shifting.
Anyone got any suggestions? True that if you have electronic shifting you
can shift even if you're a weak kneed shifty eyed moron - say like Kyle,
Howard, Carmine or datakoll. But for anyone with the coordination of a skunk
sprayed squirrel Ergo or STI has no drawbacks aside from those huge lever
bases.


Like I asked a shimano clone at Interbike, pointing to a particularly
goofy FD setup, "what's that for?", I ask.."For selling" he answers.

Like disc brakes on road bikes, tubeless, threadless, compact frames,
oversized handlebars, etc....many will say what an improvement these
things all are but mostly they are for 'selling'.


jeepers, who ****ed in your cornflakes this morning? get off your high
horse peter. the bike you rode in on this morning, the steel merckx
that you love so much, /that/ is the product of over 100 years of
"selling". it's darwinian. what works sticks around. what doesn't,
gets dropped. watch, learn and enjoy.
 




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