Alcon Brake Bias Controller, Feeling?

ZieRobot · Dec 12, 2021

Hey I made this one where i am trying to replicate a Alcon BAA3300X20 , and i like to share it, and ask if anyone have tested a "real" Brake bias adjustment knob?
I have not... is it a lot of resistance? is it with steps or without?

https://www.thingiverse.com/thing:5162624

FrictionZone · Dec 12, 2021

There is some resistance -- no steps, because it is attached to a cable. Closest I can describe it, is a knob on an exercise stationary bike.

ZieRobot · Dec 12, 2021

FrictionZone said:
There is some resistance -- no steps, because it is attached to a cable. Closest I can describe it, is a knob on an exercise stationary bike.

Sweet, thanks! That makes sens! Now I have to figure out a way to mimic that

JohnBeardmore · Dec 13, 2021

Have a look at what the knob is moving on a balance bar. It causes a spherical bearing to slide in a sleeve.
So it is smooth movement with some resistance.

Though some adjusters have indents / clicks to allow precise adjustment.

ZieRobot · Dec 13, 2021

JohnBeardmore said:
Have a look at what the knob is moving on a balance bar. It causes a spherical bearing to slide in a sleeve.
So it is smooth movement with some resistance.

Though some adjusters have indents / clicks to allow precise adjustment.

It would be pro level stuff if the rotary encoder was in the end of the balance bar, so you have the mechanical feel… oh no! Now I am getting new ides…

PlayNic13 · Jun 7, 2023

Could you maybe share the file you used for the stickers. I'd like to replicate your design but I'm having a hard time finding a good template to replicate it myself

stigs2cousin · Jun 8, 2023

Easiest "feel mod" could be a springloaded plunger in the knob pressing against the mounting surface that increases resistance.
Most rotary encoders turn too easily anyway and with the big knob I imagine there will be very little force to turn the adjuster.

springloaded plunger at DuckDuckGo

DuckDuckGo. Privacy, Simplified.

duckduckgo.com

Daniel R. · Jun 9, 2023

All the Brake Balance adjusters I had in my hands had the "click".
So I would say, it's common they have them.
The one from OBP f.e. definitely has them, and it's one of the cheaper models.

Daniel R. · Jun 9, 2023

PS.
In real ones without being attached to a balance bar/ pedalbox it's not a lot of resistance except the "clicks".

If attached to a balance bar. It's not that heavy either, but you feel the torsion of the cable thing.
So it builds up resistance quite a bit (pretty squashy feeling) and then it rotates the balance bar.
The clicks are one per revolution normally

Chris_I · Jun 9, 2023

ZieRobot said:
Sweet, thanks! That makes sens! Now I have to figure out a way to mimic that

Maybe you can use a haptic encoder like this one but without the screen. In the code you can do all kinds of crazy things to mimic different styles of rotary knobs.