PC Driving Simulator Help Please (Motion)

I dont know how into this you want to get, but I assume you want something more than a vibrating desk chair. Something similar to a professional race sim like this one.

This is worth watching. http://www.youtube.com/watch?v=NsvWnGgT7Ok  Its Nico Rosberg talking about his driving position inside the car. He points out a lot things to consider in designing your seat. Really put some time into picking your seat as your entire design will be based around it.

If it were me, and I had those motors, Id probably seriously look into going down to my local pick 'n pull (junk yard) to get some parts.

Im not 100% sure that the ratios will give you a good speed, BUT I think some (4) hydraulic jacks (the kind that come in trucks and SUVs) will give you a good, fluid roll and pitch. They can be had usually for only like 10 bucks a piece too. Im thinking use the motors to raise and lower the jacks. I would advise against screw jacks as their operation tends to be rather jolty at startup, and inconsistent in the torque required to drive them across their range. Their nonlinear nature will likely be a bear to account for in code, although im not sure how noticeable it will be at the weight you are using.

You will probably also want to get some driveshaft assemblies here too. Each end has a nice and strong U-joint for connecting the jacks to the seat frame. he only real issue will be cutting them to length... The u joints from steering assembly might also work. they will be easy to cut, but I question their strength.

Things that arent necessary, but you might like:

I suggest you get a seat track too. This is just to provide a simple sturdy way to find the perfect seat to pedal distance. I prefer to weld it in place afterwards, but that is pretty much optional. I just hate when people adjust my seat.

You might like to get a pedal assembly too. I prefer a real metal pedals to the plastic ones. I use the full braking system for the brake pedal, using  spring feels weird. for my brakes I do: pedal->hydraulics->caliper-> load cell ->microcontroller->input device.

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Im not so hot at electrical stuff. but id definitely be using  microcontrollers. I have no idea what circuitry is in your curent steeringwheel setup. but basically id think you could split the signal to the steering motor controller to the input on a microcontroller. then use the uC to control PWM to run the chair motor. This way you can easily dial in the motor speed needed to move the chair. I cant really say any more since i have no idea what the circuitry looks like in either device.

I dont know how into this you want to get, but I assume you want something more than a vibrating desk chair. Something similar to a professional race sim like this one.

This is worth watching. http://www.youtube.com/watch?v=NsvWnGgT7Ok  Its Nico Rosberg talking about his driving position inside the car. He points out a lot things to consider in designing your seat. Really put some time into picking your seat as your entire design will be based around it.

If it were me, and I had those motors, Id probably seriously look into going down to my local pick 'n pull (junk yard) to get some parts.

Im not 100% sure that the ratios will give you a good speed, BUT I think some (4) hydraulic jacks (the kind that come in trucks and SUVs) will give you a good, fluid roll and pitch. They can be had usually for only like 10 bucks a piece too. Im thinking use the motors to raise and lower the jacks. I would advise against screw jacks as their operation tends to be rather jolty at startup, and inconsistent in the torque required to drive them across their range. Their nonlinear nature will likely be a bear to account for in code, although im not sure how noticeable it will be at the weight you are using.

You will probably also want to get some driveshaft assemblies here too. Each end has a nice and strong U-joint for connecting the jacks to the seat frame. he only real issue will be cutting them to length... The u joints from steering assembly might also work. they will be easy to cut, but I question their strength.

Things that arent necessary, but you might like:

I suggest you get a seat track too. This is just to provide a simple sturdy way to find the perfect seat to pedal distance. I prefer to weld it in place afterwards, but that is pretty much optional. I just hate when people adjust my seat.

You might like to get a pedal assembly too. I prefer a real metal pedals to the plastic ones. I use the full braking system for the brake pedal, using  spring feels weird. for my brakes I do: pedal->hydraulics->caliper-> load cell ->microcontroller->input device.

-------------------------------------------------------------------------

Im not so hot at electrical stuff. but id definitely be using  microcontrollers. I have no idea what circuitry is in your curent steeringwheel setup. but basically id think you could split the signal to the steering motor controller to the input on a microcontroller. then use the uC to control PWM to run the chair motor. This way you can easily dial in the motor speed needed to move the chair. I cant really say any more since i have no idea what the circuitry looks like in either device.