There must be some way, probably in the software but perhaps with a pot/resistor, to configure the no-load characteristic of the load cell. It’s sometimes called zero, deadload, preload, fixture load.
However, if you can’t find a way to do that, you could trim the signal down (or up) with some resistors across the load cell bridge.
I have tried with a second pot but both pots affected the no-load and max load so it didn’t work. I may not have had it wired up properly so if you have any knowledge or diagrams of how to do it I am all ears
If I could get the no-load to be absolute zero (or very very near to it) then adjusting the max load with the existing pot wouldn’t have as big an effect on the no-load amplification. IOW if no-load was say just 1 or 2 then amplifying it by 10 to make it 10-20 wouldn’t matter as I could set minimum register in the software to 20. But I guess that would also reduce the max signal output s woldn’t actually achieve anything ??
Again any diagrams or advice on how to achieve that would be great.
Just for some more info, currently I have the pot set to minimum amplification so the pedal needs a lot of pressure to reach max output. On a scale of 0-1024 the no-load is 145 and max is 650. If I adjust the pot so the pedal is “softer” and can reach 1024, the no-load signal is amplified to about 300, which with the zero point in software remaining at 145 means I have 30% braking at no-load. I can easily adjust this in software but I race in VR and was looking for a way to do it with an easily reached pot mid-race.
NITERIDA:
Just for some more info, currently I have the pot set to minimum amplification so the pedal needs a lot of pressure to reach max output. On a scale of 0-1024 the no-load is 145 and max is 650. If I adjust the pot so the pedal is “softer” and can reach 1024, the no-load signal is amplified to about 300, which with the zero point in software remaining at 145 means I have 30% braking at no-load. I can easily adjust this in software but I race in VR and was looking for a way to do it with an easily reached pot mid-race.
I don't understand what you can and cannot change in your software.
I’d expect there to be a way to calibrate the pedal, first unloaded, then at some known load.
Software is basically just a start and end point for the brake input into the game.
Scale is 0-1024. When load cell is at rest the output is 145, so i set the software to minimum input of 145 so as soon as you touch the brake it registers in game. I could set this to say 300 so it doesn’t register until you have a certain amount of pedal pressure (deadzone).
At the other end when I have the pot turned down so there isn;t as much amplification the max output of the loadcell with my absolute max leg pressure on the pedal is about 700. So that is where I set max input in the game for 100% brake activation.
The problem is that some cars react differently with different settings. So F1 cars I need that 145-700 range. Road cars need a softer pedal feel so I either need to adjust the software max down to 450 (less pedal pressure to reach that number) but I have to remember to do that before I start racing and sometimes I wnat to adjust it midrace too. Which in VR is impossible to do.
I can also adjust the sensitivity by the pot so reaching 700 is much easier but this means the bottom input of 145 now has a value of 300 which means I have 25% braking with no pedal pressure
First world problem really but was just hoping somebody new a first world solution
Software is basically just a start and end point for the brake input into the game.