In December 2010 Logitech released a new firmware which greatly reduced the amount of hysteresis in the primary X and Y axes, reducing it from about 1.2% down to about 0.15%. It also exists on the toe brake axes, the mini-stick axes and even the PRIMARY X and Y axes of the joystick itself! This is especially confusing considering the primary X and Y axes use hall effect sensors instead of potentiometers! It's about 3% for the rudders, 5% for the throttles and 3% to 4% on the trims. This makes fine-tuning things extremely difficult and the amount it jumps varies depending on the axis. The problem is that it has NOT been properly implemented, and instead what you get is this:ġ2% 12% 12% 9% 8% 7% 6% 5% 4% 3% 2% 1% 0%ĭo you see the difference? It registered no movement at first but then JUMPED to compensate for the physical travel. It's actually a brilliant solution and if properly implemented, if you were to slightly reduce your throttle you'd see this as you slowly move the lever:ġ2% 12% 12% 11% 10% 9% 8% 7% 6% 5% 4% 3% 2% 1% 0% Logitech decided to use firmware logic to slightly reduce the sensitivity when the direction is reversed. Granted it's only a little bit but it can still happen.
Joystick potentiometers are very similar and lower quality pots will do this under normal circumstances. Have you ever slowly turned the volume knob on an old radio only to be scared silly by a loud SCRATCHING noise coming from the speakers? This is due to an extreme amount of jitter called 'spiking'. Logitech has implemented a 'hysteresis' upon reversal of an axis to help compensate for something called 'pot jitter'. As you slowly increase the throttle you would expect it to do the following:Ġ% 1% 2% 3% 4% 5% 6% 7% 8% 9% 10% 11% 12%Įasy enough to understand, right? OK lets say at this point you decide to slowly reduce your throttle. They call it 'hysteresis' and claim that it must exist. From what I understand their engineers believe that this is a feature of the stick and NOT a bug.
This is a known 'bug' in the joystick's logic and Logitech is being a huge PITA about fixing it. what's wrong with the G940? Two words: REVERSAL BUG. Well guess what? It's expired now! So the question is. I've been putting off repairing my G940 until the warranty ran out. First off, CLICK HERE for a direct link to this webpage
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