G940 MODDING (Warning large pictures)

[Scarecrow]

What is the response like from the pots now that you've modded it? Do they flicker?

[Zerotown]

Thank you very, very much for this write-up!

[MasterTec]

Originally Posted by Scarecrow

What is the response like from the pots now that you've modded it? Do they flicker?

The response is instant. No flicker at all. I was leery about it because of the suspicion of Logitech using poor quality potentiometers (especially after seeing how cheesy the throttle pots are) but I have to admit that everything is very stable and VERY precise. Also, Leo Bodnar's BU0836 board might do a good job at filtering all of that out as well!

All I can say is that it is behaving VERY WELL and I now love my G940 once again!

I do have an intermittent connection for the R2 trim and have traced it down to the network cable plug at the throttle. That's probably what I get for using cheap monoprice parts but I will be redoing that part of it, probably running a permanent cable from the throttle to the BU0836 controller board with only one plug instead of two.

As far as the soldering goes don't let that scare you. My soldering is far from 'professional' but still provides a very good electrical connection. It's not very difficult at all (just be careful not to burn yourself).

[Scarecrow]

Its bizzare that they haven't fixed this yet when its not apparently doing anything apart from ruining the the controller. I still use the G940 for Clod as the stick is excellent. Really sad that the powers at be won't see sense on this issue when you and others have proved there is no issue in using the raw ouput from the pot.

[JumpingHubert]

why so complicated? There is a less expensive, less time consuming way with far better results http://forums.eagle.ru/showthread.php?t=69785

[Sokol1]

JumpingHubert,

Is not case. Every with HALL sensor or high quality pots, ie. Bourns, Spectrol, the G940 reverse bug still. The problem is in firmware. MasterTec solve this with different controller.

G940 already use HALL sensor (Melexis 3D - same of T.16000M, Warthog) in X and Y axis.

Sokol1

[JumpingHubert]

ok sorry, i thought the g940 has cheap pots.

[Artist]

Originally Posted by JumpingHubert

ok sorry, i thought the g940 has cheap pots.

It does. Only the X and Y axes of the stick are hall-sensored. All other axes have 'cheap' pots (I've seen those on the throttle-levers when I modded mine): trim1-3, throttle-levers 1 an 2, R1 and R2, the pedals, and the 2 toe-brakes.

Purportedly this is the reason why Logitech has fixed (well, minimized) the ReversalBug on X and Y axes of the stick, but has not done anything about all the other axes, and as rumour has it, will not ever (see here and here).

The reason behind this refusal is - again a rumour - that the ReversalBug prevents users from noticing the wearing-out of the cheap pots - because they're already used to this kind of behaviour. It makes sense to me, because the ReversalBug is, as Sokol1 wrote, in the Firmware and (a) was easily fixed for the hall sensored axes and completely disappears when you connect the pot-sensored axes to one of Bodnar's boards.

Artist