jjc86 / g940-total-conversion-kit

FFB Joystick Base Mod

G940 Total Conversion Kit

FFB Joystick Base Mod

This Mod is based on the gimbal design of: https://github.com/o-devices/bldc-ffb-joystick-base and the custom firmware patch by fred41: https://github.com/fred41/G940-firmware-fixes

It only uses the main PCB of the original G940 joystick base, it's magnetic axis sensor, the DC motors and the patched firmware. Features:

• sturdy plywood construction (8mm laser cut)
• stronger gimbal for custom grips and extensions (designed by https://github.com/o-devices)
• active cooling via two 40mm 5V fans (USB powered)
• enhanced axis sensor precision without backlash
• lots of room for customization and addons

The main concept is a modifiable "gimbal tower" design, where you can add and change parts to fit your needs for customization.

The heart of the "Gimbal Tower" is the "Sensor Tower" to scale the axis deflection of the gimbal (~20° in every direction) down to ~15° for the Melexis magnetic sensor.

The pulleys are modified for 366-3M-9 timing belts (2x).

For stick extensions you can modify the firmware patch's main axis scaling. https://github.com/fred41/G940-firmware-fixes

fred41 was so kind to provide preset values with matching checksums:

Scale: 0x48 | 72 CRC32: 0x9cfb053c (huge)

Scale: 0x4c | 76 CRC32: 0xe12649ba

Scale: 0x50 | 80 CRC32: 0x94f5b39f (default)

Scale: 0x54 | 84 CRC32: 0xe928ff19

Scale: 0x58 | 88 CRC32: 0x6f4f2a93

Scale: 0x5c | 92 CRC32: 0x12926615

Scale: 0x60 | 96 CRC32: 0x84e8ded9

Scale: 0x64 | 100 CRC32: 0xf935925f

Scale: 0x68 | 104 CRC32: 0x7f5247d5 (recommended for Virpil's Flightstick Extension - 200mm)

Scale: 0x6c | 108 CRC32: 0x28f0b53

Scale: 0x70 | 112 CRC32: 0x775cf176

Scale: 0x74 | 116 CRC32: 0xa81bdf0

Scale: 0x78 | 120 CRC32: 0x8ce6687a

Scale: 0x7c | 124 CRC32: 0xf13b24fc

Scale: 0x80 | 128 CRC32: 0x27342928

Scale: 0x84 | 132 CRC32: 0x5ae965ae

Scale: 0x88 | 136 CRC32: 0xdc8eb024

Scale: 0x8c | 140 CRC32: 0xa153fca2

Scale: 0x90 | 144 CRC32: 0xd4800687 (very small)