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Garmin cadence question

Old 06-04-16, 09:06 AM
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taat2d
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Garmin cadence question

Hi everyone. I'm just getting back into riding. Been off a bike for too long. I just got a new road bike, and being the gadget junkie that I am, I couldn't help but get a Garmin 520 as well. I bought the 520 bundle. I hooked up the speed sensor and the cadence sensor. I see the speed sensor is working properly, but I can't find the cadence reading. Does this mean it's not working? The cadence sensor shows in the settings. Not sure if I did something wrong. Any help would be appreciated. Thanks in advance.
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Old 06-04-16, 09:09 AM
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make sure firmware is most current.. make sure it connects (go to sensors screen)

Battery ? I assume you have the new one that goes on the crank arm..
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Old 06-04-16, 09:19 AM
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Originally Posted by taat2d View Post
Hi everyone. I'm just getting back into riding. Been off a bike for too long. I just got a new road bike, and being the gadget junkie that I am, I couldn't help but get a Garmin 520 as well. I bought the 520 bundle. I hooked up the speed sensor and the cadence sensor. I see the speed sensor is working properly, but I can't find the cadence reading. Does this mean it's not working? The cadence sensor shows in the settings. Not sure if I did something wrong. Any help would be appreciated. Thanks in advance.
Are you sure the speed sensor is working? The 520 will record speed from GPS if it doesn't see a speed sensor. Did you go through the procedure to add a new sensor? Menu->Settings->Sensors->Add Sensor->Select Sensors to Add

It won't automatically add a new sensor. You have to go through the above steps to pair the sensor.
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Old 06-04-16, 09:21 AM
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Yes I have the one that goes on the crank arm.
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Old 06-04-16, 09:24 AM
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Ok I think that's it. I didn't know I had to pair each sensor. I thought I read that it comes with ANT in the manual and that it would pair to each other automatically. As for the speed sensor vs. Garmin's GPS recording speed, is there a difference between the 2?
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Old 06-04-16, 09:41 AM
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Originally Posted by taat2d View Post
Ok I think that's it. I didn't know I had to pair each sensor. I thought I read that it comes with ANT in the manual and that it would pair to each other automatically. As for the speed sensor vs. Garmin's GPS recording speed, is there a difference between the 2?
The Edge devices still uses GPS to log position to FIT riding files. The question is how it computes instantaneous speed.

The speed sensor is a GPS-calibrated rollout speed sensor. Using GPS, and counting wheel revs over a set distance you get a very accurate traditional rollout measurement (a normal human rollout is maybe 10 meters, the Edges do rollout calibration over 500m-1km IIRC). Then using the speed sensor you get a very consistent and accurate speed measurement no matter what braking/accelerating etc you do. GPS utilizes spherical trigonometry and Einstein relativity as applied to multiple atomic clock radio signals, and due to complexities of math and measurement-has a fair bit of lag all to do the same thing. Which is not only slower, but takes more battery. Also, bicycles don't tend to hold a consistent speed-so that lag gets exacerbated a bit; unlike a car on the interstate that tends to be one speed.
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Old 06-04-16, 09:57 AM
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Originally Posted by Marcus_Ti View Post
The Edge devices still uses GPS to log position to FIT riding files. The question is how it computes instantaneous speed.

The speed sensor is a GPS-calibrated rollout speed sensor. Using GPS, and counting wheel revs over a set distance you get a very accurate traditional rollout measurement (a normal human rollout is maybe 10 meters, the Edges do rollout calibration over 500m-1km IIRC). Then using the speed sensor you get a very consistent and accurate speed measurement no matter what braking/accelerating etc you do. GPS utilizes spherical trigonometry and Einstein relativity as applied to multiple atomic clock radio signals, and due to complexities of math and measurement-has a fair bit of lag all to do the same thing. Which is not only slower, but takes more battery. Also, bicycles don't tend to hold a consistent speed-so that lag gets exacerbated a bit; unlike a car on the interstate that tends to be one speed.
Thanks for the explanation. Very much appreciated.
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Old 06-04-16, 03:07 PM
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I'm glad someone asked this question about cadence. I still have not figured out where its located or how to view it while riding with the 520. I have a duotrap for my sensor
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Old 06-04-16, 03:30 PM
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Three out four Garmin sensors I've purchased have needed batteries out of the box.

Won't pair, losing connection during rides, etc.
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Old 06-04-16, 04:12 PM
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Originally Posted by timothyh View Post
three out four garmin sensors i've purchased have needed batteries out of the box.

Won't pair, losing connection during rides, etc.
that sucks!!!
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Old 07-02-16, 09:39 AM
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I have been searching threads about duotrap cadence connection problems. Did you resolve your issues? I have duotrap and just added a Garmin Edge 1000. I am unable to get a cadence connection at this time. The duotrap connected seamlessly to my Strava app on the iPhone 6.
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