MobiFlight Community Support

Hi All,

I am trying to build a trim wheel using cheap encoder modules.
I have managed to get it working, but the ration of rotation does not match between my trim wheel and the sim.
if I turn the wheel for one full turn, it barely move for 1 dent in the sim.

I have already set the encoder to 4 dent per turn.
logging is off
using FS2020 - standard Cessna 172 steam gauge
using event IDs: ELEV_TRIM_UP and ELEV_TRIM_DN

any solution to fix the ratio?

Regards,
Ali

Hi
The Event pretty sure execute a premade Action. It inc/dec the Trim by a hardcoded range. So if you for example need to click the virtual trim wheel 100 times to get a full resolution then your input also must send 100 Inputs per 360° turn ( Note this are example numbers i not know if its 10, 30 100 or something else)

The Encoder have a fixed mechanical detent number.... Some got 15,20,24 or so. Means the Number of commands you send with a 360° turn is related to this mechanical specification.
( Change the 1:1 1:2 or 1:4 settings is wrong. These must be correct used for your typ of Encoder..... This is NOT to change number of signals as you like)

**************

To solve....

Mechanical. If you need e.g. 60 Signals in Sim but the Encoder got 20.... Then you can use a 3:1 Cogwheel Gearbox.... Means 1 Turn of your wheel will turn the encoder 3 times.
NOTE: If we get verry high here may we get in trouble..... FSUIPC and Mobiflight can not send a high number of signals within a verry short time ( fast turning).

Software:
Check if there exist a Offset in FS2020 for the Trim Axis position..... In P3D it was e.g.

0BC0 2 Elevator trim control input: –16383 to +16383

So you could use instead of the hardcoded event a Offset write here.
Find out ( by reading this Offset) what value change happen if you turn the virtual wheel 360° . Lets say e.g. it change by "650"
Then count the Inputs from your encoder.... Lets say 20 Detents. .... Means 650/20= 32,5 ~~32 So each detent must change the Offset by 32 (example) to get the same situation like in the Sim virtual wheel.
So you use a Config that say.... On Left .... Offset 0BC0 Value $-32 On Right $+32 .

NOTE... Again example Values.... You must calculate by the correct Offset Values and your number of Encoder detents yourself !!


I hope this helps !