My simulator project

Good evening, here is my dynamic simu project.
My text is translated by DeepL Translate, so I apologize in advance if it is not understandable :/


For the computer part: Ryzen∕Radeon, triple 22' screen, G27 steering wheel, with "home made": button box, On/Off handbrake and sequential gear lever.

Specifications:

-I start on a 3dof( roll, pitch and heave) with for the electronic part the classic arduino-sabertooth-motors reductor 440w... to animate the cockpit part ( seat, steering wheel, pedal). I add an axis (yaw) only on the seat (motor 120W). I helped me with the French forum PCSHM for the dimensioning of the whole.

-The structure shall be made of steel section.

-The height in neutral position of the bucket rails shall be 180mm, in order not to have to modify the position of the screens. This implies a safety "end stop" if the motor exceeds 120° (stops adjustable to + or - 10° if the motors have a rebound in max position)

-The electronics will be deported in an old PC tower, I don't want 220 volts under my bottom

-The platform with the steering wheel/accessories will have to be easily removable, to replace it by another one with a joystick.


Here is an unfinished 3D model, used to position and size the cockpit part and the ground base part




Here is the current state of the cockpit part

The pedal support

The seat support

The base, with the temporary platform until the cockpit's centre of gravity is reached

The rest as soon as possible

hi;
The base was progressed last weekend. I had left a little bit sticking out at the front, I'll use it to fix a stabilizer.


After a test session (just the cockpit in static )in play, the pedal board revealed to be too far and too low, so I fixed it as simply as possible:


The plate for the 4th motor is fixed, the centre of gravity is defined. To start the electrical part, I started the layout of the PC tower.

Your PC runs on 220v... just saying



And for context, these 220v AC servomotor don't actually run 220v on their power wires. The servo driver works like a PC power supply. It converts the 220v AC, to three DC voltage signals that are switched in sequence using PWM in the driver... The DC voltage for each of the three phases is also variable from 0v to 200v, depending the motor load and speed it needs to develop...

hi,
I'm going to use 24v motors.
On all the motor/rod/crank sims I see, the 220/24v power supplies are placed under the seat. The structures are often made of wood. Mine is steel, and I don't want 220v cables in contact with it.

hi,
The cockpit part is almost finished. I only put an undercoat of paint, in case there are modifications to be made after the final tests.







The crank is 5cm long. It will only make a few centimetres of displacement of the bucket; I think it will be enough, the loss traction being easily recognisable with the FFB.



The small 6mm rod parts will be used to pass the 3 point harness.

The PC box has been put on a diet, the wiring has started.

Details of the 0/1 handbrake and sequential gear lever

The blocks are printed in PLA.


I got the pivots, springs and microswitches from my old logitech Momo steering wheel.




The handbrake lever comes from a ride-on mower, the knob from a car centre.



I cut two usb extensions to connect everything to the steering wheel, the microswitches are connected to the steering wheel by splitting the red buttons 21/22 and the butterfly levers of the G27.

Hi;

The elec part is functional:



The tower is not finished, but for the first test it is enough:



The motors are wired. After a first test with just the cranks on LfS, the assembly of the cockpit starts:


The final result:







Sorry for the quality of the pictures, my old phone can't do better...

First travel test with Simtool

Test with LfS in the Gti

Test with the Bmw, same setup in simtool

Detail of the button box



I used a Xinmotek module


The push buttons are classic



The 3 lower diodes are controlled by the big switches combined with a switching converter.




The top 4 diodes are controlled by the lever switches. The diodes and converters are powered by a small 220/12V transformer

The holders are printed in PLA

These motors seem very fast judging how quickly the platform moves. Have you already tried it with more weight in the seat?

These are 24v motors, like this one: https://czbangyi.en.made-in-china.c...440W-60-1-IEC63b14-Brushed-DC-Gear-Motor.html

The structure is about 50kg with the seat and the steering wheel, with me on it the moving weight is about 120kg

A quick video, same setup as the unicorn. But this time the driving is with the steering wheel and not with a gamepad, so more fluid, less brutal change of direction.

Still quite responsive, awesome!

I think that the low weight of the mobile unit has a lot to do with it. And without the 3 springs the motors are much slower, which makes the movements less generous.

the modelling of the end stops is done, a cam fixed on the shaft of the gearboxes