LCD3 – PAS it not working

[tndr_1]

Or at least, the PAS is not working as I expect it to work. I bought the kit from LeafBike and they confirm the the install of the PAS looks correct and that the PAS should work. However, they wont share the correct C settings, which they set themselves before shipping and I might have changed them now so that it doesn't work. I have now shared my settings with them so a response is yet to come. We'll see!

But I figure it will be easier to get an understanding of what is going on from you guys. With these settings, I expect the pedal assist to kick in when pedaling a couple of turns when having the assist gear to 1-5. But nothing happens. The throttle works fine. Bike runs well. PAS does not. This is the kit I have: BMX 20 inch 60V 2000W rear hub motor - electric bike conversion kit

Here are my settings:
P1 46
P2 0
P3 1
P4 0
P5 0

C1 01
C2 0
C3 8
C4 0
C5 10
C6 2
C7 1
C8 1
C9 0
C10 n
C11 0
C12 4
C13 0
C14 3
C15 6

 

[amberwolf]

Did it ever work correctly?

Were there any hardware changes or incidents taht could ahve damaged or altered any hardware between the time it worked and the time it did not?

If the latter is false and the former is true, then any settings changes made would likely be the problem.

If the former is false, then anything could be wrong that involves the PAS --sensor, magnets, wiring, settings, failure inside controller of any of the PAS connections, traces, components, all the way to the MCU itself.

If hte latter is true, then the likelihood is of a hardware problem direclty related to the specific change or incident.

 

[AGS]

Does it work if you peddle backwards? If so then change C1 to 5, 6 or 7 to reverse the signal.

 

[tndr_1]

Did it ever work correctly?

This I do not know. Supplier says so.

Were there any hardware changes or incidents taht could ahve damaged or altered any hardware between the time it worked and the time it did not?

No, I do not think so. Can not see what that could be that would have made any physical damage to the parts.

If the latter is false and the former is true, then any settings changes made would likely be the problem.

Yeah I agree. But what changes do I need to do? hehe

If the former is false, then anything could be wrong that involves the PAS --sensor, magnets, wiring, settings, failure inside controller of any of the PAS connections, traces, components, all the way to the MCU itself.

I understand this. But I think supplier tested this before shipping.

If hte latter is true, then the likelihood is of a hardware problem direclty related to the specific change or incident.

I do not believe there is physical damage

 

[tndr_1]

Does it work if you peddle backwards? If so then change C1 to 5, 6 or 7 to reverse the signal.

No it does not :O sadly

 

[AGS]

Do you pedal or use throttle only. Some controllers require you to pedal all of the time for the speedometer to stay on. If you stop pedalling the speedometer goes to zero.

 

[E-HP]

I understand this. But I think supplier tested this before shipping.

So you're under the impression that vendors take the kit, assemble it for testing, then disassemble it for packing and shipping? I don’t see anything like that on the website, but it would be such a premium and labor intensive service, that you’d think they’d advertise it.
If the kit didn’t work out of the box, then you should just return it.

 

[tndr_1]

Do you pedal or use throttle only. Some controllers require you to pedal all of the time for the speedometer to stay on. If you stop pedalling the speedometer goes to zero.

I am trying both. Tried everything it feels like. Hehe.

So you're under the impression that vendors take the kit, assemble it for testing, then disassemble it for packing and shipping? I don’t see anything like that on the website, but it would be such a premium and labor intensive service, that you’d think they’d advertise it.
If the kit didn’t work out of the box, then you should just return it.

I do not know? The display had 2.6km on the ODO meter. They did say that they set the settings on the controller before shipping.

 

[tndr_1]

Got reply from supplier. These are the settings that should be changed according to supplier:


Will test in a couple of hours.

 

[docw009]

There is a cable available that factories can use to copy the display settings from a master, so they don't have to pay a worker to press buttons.

The C1 parameter needs to be set for certain PAS sensors, as described above,

I looked at your seller response ...
-P2 determines how speed sensor is read. Change from 0 if you're not seeing the speed.
-P5 affects battery icon response. Should be 15 or higher for 48V.
-C3 determines PAS level when powered on. LCD3 manual says only 0-5 are used and 8 is unrecognized. I think this should be be 0 or 1. However, when I set C3 to 8 for a test on my LCD3, I still get pedal assist. Probably not your issue.
-C6 is backlight brightness. Not important,
-C7 is cruise on/off, Not important.
-C8 is temperature display. Not important. No effect on an LCD3,

In short, if you cannot get PAS with a change in C1, you probably have a bad PAS sensor, or it is not seated in its connector.

 

[tndr_1]

Aah, oh well. Darn! Thank you so much for giving me these insights.

Well... guess I need to buy another sensor to try that theory out.

 

[Diggs]

If you want a bit more info on the LCD3 then Bolten does a good job -

 

[E-HP]

I do not know? The display had 2.6km on the ODO meter. They did say that they set the settings on the controller before shipping.

I wonder if you got a returned kit/display.

It looks like Leaf uses an unusual version of the LCD3, since most don't support the C15 parameter.

 

[tndr_1]

How many turns is needed for pedal assist to kick in?

I should hear the motor starting. Right?

 

[docw009]

Less than 1 turn will activate the pedal sensor. DId you trace the PAS sensor cable back to the controller connection?Does it use the round Julet connectors or the flat connectors? The flat connectors are easier to porbe.

Both have only three wires. Two are power and ground, and the third one flips between 0 and 5 volts as the disk rotates.

 

[tndr_1]

Okey! So I have found the issue and my pedal assist is now working!

This orientation of the sensor did not work (custom bracket):



But this worked:


I thought hall sensors didn't care about orientation?

 

[docw009]

Pedal sensors are directional. The pulse pattern can signal if you are spinning forward or backward. You don't want the motor to turn on if you're just positioning the pedals at a stop so you can push down to start. With those design constraints, I guess 90 degrees off was too much,

 

[tndr_1]

Okey, good to know. Thank you!

My issue now is that it triggers both forward and backwards. I have set my C1 to 1 so it is set to only forward mode.

Do I need to adjust the sensor again?

 

[dgc]

Yep, pedal sensors are directional I have had to reverse the sense direction in the controller setup when I have got a hollowtech 2 BB setup as the pedal sensor is mounted behind the chain-wheel(s).

 

[E-HP]

Okey, good to know. Thank you!

My issue now is that it triggers both forward and backwards. I have set my C1 to 1 so it is set to only forward mode.

Do I need to adjust the sensor again?

Is the sensor oriented in the same position if it were mounted using the non custom (original) mounting? (Should it be rotated 180 degrees?)