firmware : ersky9x-r212
The problem was first encountered when changing RUD settings and using the rudder stick. I went to P2 in case it was something to do with the joystick, so please don't get the impression that this issue is in any way related to P2. P2 just happens to be what I used for this investigation.
Chan 2 settings : Source P2, Weight +50, Offset +50, Fix offset ON, FlModetrim OFF, Trim ON
Chan 4 Settings : Source P2, Weight +50, Offset -50, Fix offset ON, FlModetrim OFF, Trim ON
The two are identical except for a negative offset on Ch 4.
All other channels have been deleted.
When I turn P2, ch 2 behaves as expected, sweeping from 0 to 100. Ch 4 is always +100 or -100.
Looking at the numerical display, the results are
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Ch 2 : -0.1 20 40 60 80 99.6 99.8 99.9
Ch 4 : 100.1 100.1 100.1 100.1 100.1 100.1 100.1 -100.2
If Fix Offset is set OFF on ch4, the results are not what I want, but more sensible. Both channels show continuous movement of the pot....
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Ch 2 : -0.1 20 40 60 80 100
Ch 4 : -75.0 -55.2 -34.8 -14.9 +5.2 25.0
I have tried playing with the negative offset, and there again, the results are the same on both models. Setting the Offset to -1, Fix Offset ON, gives
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Ch 2 : -0.1 20 40 50 50.9 51.0 60 80 100
Ch 4 : 100.1 100.1 100.1 100.1 100.1 -100.2 -100.2 -100.2 -100.2
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Ch 2 : -0.1 20 40 60 80 100
Ch 4 : -50.5 -30.3 -10.4 +9.6 +29.6 +49.5
Beautiful pots, by the way. Very smooth. They have the feel of real quality.