Help! Pas in reverse

[Kneebiker]

Hello All.

I'm a bit flummoxed. Ive wired up a bafang front hub with kt controller. The pas sensor was a generic one and didn't come in same kit as kt lcd and controller. So the wire colours didn't match nor did the connector.

The pas side is red,blue and yellow. The controller side is yellow , black brown

The only way I can make the thing work is to match pas to contoller like this red/brown, yellow/black and blue/yellow.

Thing is it only makes the motor work if I turn the cranks backwards. Ive tried flipping the magnets and other wiring methods but I cam make anything else work at all

What am I missing ? I feel it must be something obvious !

Thanks

 

[AGS]

C1 changes the pas direction. If your display is set to 0, or 1 or 2, change it to 5 or 6 or 7 and vice versa.

0 and 5 are usually the highest settings
2 and 7 are usually the standard settings
1 and 6 are usually the middle settings

 

[saneagle]

Hello All.

I'm a bit flummoxed. Ive wired up a bafang front hub with kt controller. The pas sensor was a generic one and didn't come in same kit as kt lcd and controller. So the wire colours didn't match nor did the connector.

The pas side is red,blue and yellow. The controller side is yellow , black brown

The only way I can make the thing work is to match pas to contoller like this red/brown, yellow/black and blue/yellow.

Thing is it only makes the motor work if I turn the cranks backwards. Ive tried flipping the magnets and other wiring methods but I cam make anything else work at all

What am I missing ? I feel it must be something obvious !

Thanks

On any bike, you reverse direction of a magnet disc type PAS by flipping the magnet disc. If it works backwards, you installed the magnet disc the wrong way up.

KT controller has a setting to respond to the reverse pattern, but it doesn't always work. Try it first, otherwise flip the disc.

 

[Kneebiker]

C1 changes the pas direction. If your display is set to 0, or 1 or 2, change it to 5 or 6 or 7 and vice versa.

0 and 5 are usually the highest settings
2 and 7 are usually the standard settings
1 and 6 are usually the middle settings

Thanks, I'll find some inx for rhe lcd

 

[Kneebiker]

On any bike, you reverse direction of a magnet disc type PAS by flipping the magnet disc. If it works backwards, you installed the magnet disc the wrong way up.

Honestly I've tried that. It simply does nothing when flipped

 

[Kneebiker]

Honestly I've tried that. It simply does nothing when flipped

Honestly I've tried that. It simply does nothing when flipped

 

[saneagle]

Honestly I've tried that. It simply does nothing when flipped

You have C1 set incorrectly.

 

[Kneebiker]

You have C1 set incorrectly.

Thanks for your help. I'm really lost now

Tried every single setting with magnet flipped each way. It only ever works backwards. It's really weird on some settings it works backwards no matter which way magnet ring is flipped!

 

[Nealh]

Show us a pic of how the sensor is fitted, you may have to rotate the sensor 180 degrees.

 

[Nealh]

Hello All.

I'm a bit flummoxed. Ive wired up a bafang front hub with kt controller. The pas sensor was a generic one and didn't come in same kit as kt lcd and controller. So the wire colours didn't match nor did the connector.

The pas side is red,blue and yellow. The controller side is yellow , black brown

The only way I can make the thing work is to match pas to contoller like this red/brown, yellow/black and blue/yellow.

Thing is it only makes the motor work if I turn the cranks backwards. Ive tried flipping the magnets and other wiring methods but I cam make anything else work at all

What am I missing ? I feel it must be something obvious !

Thanks

Wiring sequence is correct.
PAS Red /5v , Blue /Sig & Yellow /Gnd.
Con Brown/ 5v, Yellow/Sig & Black /Gnd.

Red or Brown can be 5v , Yellow or Black can be Gnd. When both Yellow and Black are both used then Black is Gnd and Yellow the Sig.

 

[saneagle]

Thanks for your help. I'm really lost now

Tried every single setting with magnet flipped each way. It only ever works backwards. It's really weird on some settings it works backwards no matter which way magnet ring is flipped!

The double hall sensor ones only work in one direction. You didn't buy one of those stupid 12 magnet ones did you? If you did, it has to go on the other side of the crank.

The wires are correct when it works backwards. You can't change direction with the wires. 5v and ground power it. They must be the right way round otherwise it doesnhave power. The third wire is the output signal that is in a pattern according to the orientation of the magnets and the direction of their rotation.

 

[Kneebiker]

Show us a pic of how the sensor is fitted, you may have to rotate the sensor 180 degrees.

Thank you

Here it is. The tape is just for testing purposes to keep in position. Once sorted I'd fix properly

 

[Kneebiker]

The double hall sensor ones only work in one direction. You didn't buy one of those stupid 12 magnet ones did you? If you did, it has to go on the other side of the crank.

The wires are correct when it works backwards. You can't change direction with the wires. 5v and ground power it. They must be the right way round otherwise it doesnhave power. The third wire is the output signal that is in a pattern according to the orientation of the magnets and the direction of their rotation.

Ahh, it's seems I did buy one with 12 magnets. If that's the issue can you recommend me a replacement ?

 

[AGS]

Have you tried fitting it on the chain side? The manual says the controller will work with a 12 magnet pas, but people have had issues.

 

[Nealh]

That type is designed for the rhs behind the crank wheel. What you can try before binning it or changing side, is to rotate the sensor so the head is at the top and then try it.

 

[Benjahmin]

I fitted a 12 magnet, with a KT controller, to my recumbent. Changing C1 to 07 got it working. No one more surprised than me !

 

[thelarkbox]

Same sensor i use , i can confirm its fitted on the chain side and fitting involves removing the bottom bracket and refitting with the sensor secured behind the bottom brackets external flange (sorry i dont know all the cycling terminology..).. upside down wont make a difference

 

[Nealh]

The orientation of the sensor can change the fwd or bkw signal if it is a single hall sensor, much the same as sometimes reversing the disc face.

 

[Kneebiker]

That type is designed for the rhs behind the crank wheel. What you can try before binning it or changing side, is to rotate the sensor so the head is at the top and then try it.

Thanks, sadly didn't work

 

[Kneebiker]

Thanks everyone. I really don't want to mount chain side. No room plus hassle.

I've ordered a 8 magnet lhs mounted sensor from amazon for 8 quid same day delivery