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Ergobrain installation problem: no cadence(13 posts)

Ergobrain installation problem: no cadencePaulCL
Jan 4, 2003 8:20 AM
I followed the instructions. The shifting indicator works great, but I have a problem..no cadence!

I turned the cadence "on" but no result at all.

Also, the input wiring from the "c" and "s" plugs on the unit bracket seem to be backward. I have to plug my fork unit into the "c" plug to get my MPH and then the cadence pickup into the "s" plug. These are the reverse of the factory settings. ????

With the initial factory settings, the fork unit was reading RPM (cadence) of the front wheel without any MPH. So I reversed them and then MPH was working. I think the wire or the cadence unit or magnet is bad. I've switched magnets to no avail. Any ideas?? This sucks. Paul
Try switching the sensors (nm)boneman
Jan 4, 2003 9:27 AM
Tried it and another questionPaulCL
Jan 4, 2003 9:39 AM
The "speed" sensor isn't long enough to reach the chainstay. So, that wouldn't work.

Question: I let the EB self program while in a workstand. From my understanding of the instructions, the unit cannot self learn without cadence turned on. Can it work if cadence isn't working???? Do I have to ride the bike to have cadence switch on ?? I turned the cranks without any cadence reading on the unit. Obviously, I'm looking for any solution.

Thanks. Paul
Tried it and another questionB2
Jan 4, 2003 10:17 AM
I don't know what happened exactly to create the problems you're having, but my guess is that it has to do with trying to program the unit with the bike in the workstand. You must have cadence on and RIDE the bike to self program. I believe the EB requires data from BOTH cadence and speed to determine sproket and chainring combinations. If you have the bike in the stand, you can't get the corresponding speed to go along with a specific cadence and gearing.

Try resetting the unit and starting over. This time follow the instruction for "Set the Chaniring's Shift Timing" and make the shifts as they describe while riding the bike.

Bryan
BryanPaulCL
Jan 4, 2003 10:52 AM
I put the bike on the rollers. Reset the EB back to zero on everything. While riding, holding my refrigerator, and looking at the EB and punching its' buttons, I set it. I set the wheel diameter, cadence to "on", etc. The unit read my gearing perfectly, read the shifts perfectly, but I still got a "0.0" reading under RPM when in that mode.

I'm thinking about removing the cadence sensor and putting it on the front fork as a test. Just to see if it picks up anything at all. I've tried two magnets on the cadence sensor without any luck at all. Paul
re: Ergobrain installation problem: no cadenceweiwentg
Jan 4, 2003 11:29 AM
the cadence sensor is slightly finicky. when I installed mine, I had to take the cadence magnet out of the plastic thingy that holds it, attach it to my pedal axle, and bring the thing VERY VERY close to the cadence sensor. it's practically touching.
the ergobrain will function perfectly well without the sensor. during the setup, after it asks you for the number of speeds, it will present you with a list of cassettes (they should have most of the sizes).
re: Ergobrain installation problem: no cadencePaulCL
Jan 4, 2003 11:31 AM
Did you have cadence not register until you took the magnet out of the casing??? do you have problems now??? I want to eventually put the magnet into my pedal spindle, but I have to drill it out first. paul

P.S. I use cadence all the time, so riding without it is not an option. Yes, every other function works fine. Thanks.
No need to drill out the pedal spindleB2
Jan 4, 2003 12:57 PM
If you get the #33516 magnet here: http://www.indigo.com/magnets/gphmgnts/rare-earth-magnets.html it fits quite nicely in the back of the crank in the hole for the pedal spindle. It is a very strong magnet therefore works well even if you have a slightly larger gap between the sensor and magnet. Of course your pedal spindle still needs to be made of a metal that works with magnets.

The only part of the setup you need to do while riding is the "Chaninring Shift Timing". I believe this calibrates the various shifter positions. The EB will show CAL for calibrate while you go through the shifting sequences, pressing S/S button after each shift.

If you turn the cadence "ON" and put the display in cadence mode, you should be able to take the magnet in your hand and pass it back and forth next to the sensor. If it's working, a cadence value should display. Maybe you do have a bad sensor???

Good Luck,
Bryan
Thanks guysPaulCL
Jan 4, 2003 2:30 PM
I have come to the conclusion that I have a bad cadence sensor. I've tried three magnets. I've hooked the speed sensor into the cadence sensor spot and it worked. By narrowing it down, the cadence sensor/wire/hookup is bad. Sucks, 'cause I was going to ride tomorrow. Since I have half a computer on the bike, no bar tape, etc.. I can't ride. I'll have to wait for a replacement from CC.

Thanks. paul
wait!!!weiwentg
Jan 5, 2003 9:29 AM
take any of the provided magnets and RUB it repeatedly against the cadence sensor. if you get a reading, you're in business.
to clarify: there is a strap-on cadence magnet provided (goes onto crankarm with ziptie). I took the actual magnet out from the plastic housing and attached it to my speedplay pedal. I did NOT use the magnet that is supposed to go into the crank axle; like you, I would have had to drill the axle out, and the bloody thing didn't register anyway. I eventually got one of those indigo magnets B2 mentioned; they're hellishly strong and protrude a considerable distance from the crankarm.
right now, I have no problems with the setup. I'd make doubly sure the computer is actually a dud before you send it in. good luck!
Tried it tooPaulCL
Jan 6, 2003 6:10 AM
I took the magnet out of the plastic casing and rubbed it against the sensor: no response. In fact, I tried three different magnets against the sensor: no response. I moved the cadence sensor to the front wheel to see if it would pick up the front wheel magnet: no response.

With a couple of days of hindsight, I see that there is a problem with this unit. For example: the front wheel "speed" sensor wires must be plugged into the unit case at the "c", or cadence, spot to work. The unit came from the factory wired backwords.

Before I mail it back to Col. Cylist, I am going to call CC and talk to a techie. If necessary, I am also going to call Campy USA to talk to a techie.

I'll post my end result. By the way, this sucks. Since my wife and kids were going to be gone for a couple of hours yesterday, I was looking forward to my first ride of the year. No computer, no handlebar tape, wires hanging all over the place.....bummer. Paul
re: Ergobrain installation problem: no cadencemackgoo
Jan 6, 2003 10:53 AM
Get the magnet as close to the sensor as possible, and line it up with the mark on the sensor.
bad sensor?Luis
Jan 10, 2003 4:38 PM
I wound up having to replace my speed sensor. It just wasn't sensitive enough, and despite trying all kinds of magnets it was inconsistent enought to drive me nuts. The replacement works like a charm.

The two sensors are identical, but with different wire lengths, which helps for diagnosis. FWIW my external cadence magnet is at least 6 mm from the sensor and it's always worked fine.

After two different good experiences with Campy (USA) warranty I was a little disappointed that they wouldn't cover this issue, but for <$20 at Branford I got it fixed.