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How to install your Bafang Hydraulic Disc Brake Sensors

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  • BCBeaver
    replied
    My kit came with the magnetic sensor but I also have a set of levers with a switch built in that were sent in error as part of a different kit. I've got cable brakes so I want to use them because the crappy ancient levers on the bike don't work well with the sensors (and they're crap). My levers are 2 wire, the magnetic sensors are 3 wire. What is the third wire for?

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  • AZguy
    replied
    I used 3M VRB tape (extremely strong) and put the sensors on the underside of my SRAM Guide RS brakes and you can't even see the sensors or wires and they work just fine. Took some fussing to get it right but once done.... well it's done!

    I've seen some other brakes that are darn near impossible to get the same results but on mine it's a very nice clean solution...

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  • lukasra
    replied
    I have to admit that I really hate this glue/epoxy solution! Its unreliable for me and it looks bad.
    Does anyone know a brake where these sensors are integrated?
    I assume the Magura MT5e has integrated Higo switches but cannot see for sure.

    Thank you!

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  • squirrelpie0
    replied
    After several months and nearly 10000 km on BBSO2B on TT Rover, It has been great. Started having intermittent power cut off. Noted brake signal was coming on on display, and noted 'flicking' brake level restored power. Then magnet epoxied to the handle fell off and of course problem was found. 2nd miracle was finding magnet on trail. Taping it in position would not give me consistent power on. Noted shiny coating was peeling off/ gone from some of the magnet. Taped magnet right onto sensor and power on problem solved, but of course no power off which I like for shifting.
    Question: Is it the magnet weakness causing issue or sensitivity of switch that is problem? It was not proximity of magnet to switch as that had not moved since installation. Do the switches or magnets get weak?
    Advice please

    Solved.... I think. After running with old magnet taped to sensor and no problem, I salvage a magnet from the guts of an old hard drive. Taped it to the handle for a temporary fix and according to the brake indicator lamp on the display it is working properly.. I will take it for a test run tomorrow before epoxy it in place. But looks fine w adequate apply of brake handle before indicator turns on.
    Last edited by squirrelpie0; 02-19-2018, 12:16 PM. Reason: Figured it out

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  • Petal
    replied
    I modded the mechanical bafang breaksensors with hall sensors instead. Way smaller then the original hall sensors from bafang!

    Link for foto collage: https://imgur.com/a/595wB




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  • JPLabs
    commented on 's reply
    I really like the Bafang sensors. Cheap, easy to retrofit, and perfectly reliable in my experience. You must be setting them up differently than I do. Or have a wiring glitch, perhaps.

    I set the magnet very close to the sensor. Too far, and it won't work consistently. Even if too far, I never got an error, though.

  • bikermiker
    replied
    I hate the Bafang sensors with a passion, they just don't function correctly, don't buy them is my advice. I have shimano 315"s which are really good and cost effective, I only want hydraulic fluid brakes because I go pretty fast and can not afford a brake failure so wire brakes are to risky. ,You have to position sensors and magnet very carefully for them to function at all and it's down to a 1/2 millimeter difference as the whether they work without a "out range fault" which stops the engine from turning on, I have tried all of the above positions and have had to change position of the magnets with temperature change due to weather which aren't that extreme in mild Australia, there are times when for no reason I can find that they just cut the motor because of the fault and now I have had to disconnect one of them permanently, the luna seller in Australia blames my installation and refuses to deal with a refund. Waste of money. I have ordered a complete "installed already" set of factory installed shimano 365"s from passion bikes via aliexpress which will be fitted tomorrow and I'll post to let you know how they work, it only cost me $100 AUD delivered to my door - includes everything but disc's.
    Attached Files
    Last edited by bikermiker; 09-18-2017, 04:24 PM.

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  • Dead President
    replied
    Ordered the sensors. Will take pictures and post next weekend after i get it working.

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  • JPLabs
    commented on 's reply
    I looked that up - you are right, a bit different. I see why you are asking...

    This one, right?

    https://www.hayesdiscbrake.com/wp-co...comp-white.jpg

    Looks like the front of the lever still moves away from the housing with actuation. Is that right?

    If so, then one way would be to make a small wedge to space the sensor out, so it can end next to a magnet on the lever.

  • Dead President
    replied
    Has anyone installed the Bafang BBSHD brake sensors on the Hayes Dyno hydraulic brakes (KHS-1000)? They are a bit different.

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  • JPLabs
    replied
    There are Y cables, yes. The BBS-XX controllers come with dual brake sensor wires, if you want to use both.

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  • tommie
    replied
    Dumb question #1: when the handle is released so the circuit opens again, is power instantly restored to the motor? Yes

    Question #2: is there any way to connect two ebrake sensors, one on each lever? i.e., does anyone make a y cable that is compatible with the Bafang cables?
    You don`t really need to do that, just use the left one like a motorbike clutch, only set it so you just need to touch it to kill the motor, not enough to brake if you know what i mean

    Leave a comment:


  • rimrock
    replied
    Originally posted by Sebz View Post
    This sensor is a simple piece of hardware, there are no moving parts in it, it's just a reed switch (or hall sensor) potted in the plastic case. Basically when the magnet is close to the sensor the circuit is open and the controller lets power pass through the motor. Then when you pull the magnet further away from the sensor, the switch closes the circuit and send voltage to the controller then it instantly cuts the power to the motor.
    Dumb question #1: when the handle is released so the circuit opens again, is power instantly restored to the motor?

    Question #2: is there any way to connect two ebrake sensors, one on each lever? i.e., does anyone make a y cable that is compatible with the Bafang cables?
    Last edited by rimrock; 08-04-2017, 03:22 PM.

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  • Sebz
    replied
    UPDATE, Thank you JPlab for the Tektro Draco brakes pictures and info

    Text from JPlab's post :

    These particular levers are shaped such that there isn't a good position to mount the sensor and included magnet reliably and cleanly, with the included double-stick tape. The magnet needs to move AWAY from the sensor when the brake is applied. If the sensor and magnet are mounted on the top or bottom, with the only large, flat mounting surfaces, the motion is wrong and I could not get the sensor to actuate.

    Here's what I found works well - mounting to the front face:

    The sensor mounted fairly well with the included tape, on the front of the lever housing, right next to where the lever sticks out. I might glue it later.

    Adjacent to the sensor I superglued a 1/4" x 1/8" rare earth magnet. This magnet works well, and is a bit smaller than the stock one. I think a tiny magnet like a 1/16 x 1/16 x 1/4 bar magnet should even work, but this was what I had. I put the magnet as close as possible to the sensor, with the lever reach adjusted as far out as I thought I'd ever want it. That way there is room to adjust the lever closer, without making the magnet gap too large. Actuation has been perfectly reliable for me. I chose to put is on the LH side because it's used like a clutch when shifting. Feels natural to me.

    Link to original post


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  • Sebz
    replied
    Avid Elixir, juicy....

    Front mount : This is the best way, I tried both and it worked better that way. The double sided tape won't hold it enough, not enough contact surface, you will need use hot glue (or epoxy) Click image for larger version

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    Underside install, same thing, it will need to be glued, be careful not to put glue in the pivot under the sensor! Click image for larger version

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    Hope that helps

    If you have other models you would like to share, please do.
    Last edited by Sebz; 11-08-2016, 11:25 AM.

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