School project DIY motion sim

Hello everybody!

I am currently doing my masters degree in mechanical engineering. We have a class where we have to do a mechatronics project as a team project. It has to have programming, wiring, circuit board and mechanical components.

I did a presentation on motionsim history and this semester I shouted out the idea to build one. I have built my own arduino handbrake and aluminum profile sim rig with custom sheet metal parts. Really wanted to add motion to it. I have been scared to build one due to pricing and lacking knowledge in programming and electronics.


Currently our school has given us a budget of 600€. If we are lucky we might get some support from companies that work with the university. The school has also profile leftovers and leftover motors as well.
We are currently setting up the team and trying to figure out the way we are going to add motion.
I have sfx100 and srt80 style motion in mind but we are fully open to suggestions. We were presented some motors that were leftovers from some other project.4 of everything (Servo motor, reductor and one bigger reductor).

The group has some questions if somebody has used German Dunkermotor servos?
I will pictures here about the motors we have. The information sheet says that our motor has 2860rpm and 0,4Nm of torque. Currently if I compared the motors to the classic 90st-m02430 ones, then the torque seems low. And if the reductor (7:1) is on the motor , then the rpm will be low, but we would have 5Nm of torque, which is double of 90st-m02430. We also have massive gearboxes on the the assembly aswell. In the current situation I think that the system must be rotary? I also had the idea to take off the 7:1 reductor and make a belt driven gear reducer. We would still be low on rpm but we would be nearer to the 2,4Nm of toque. What would be your recommendation, would the motors even be usable?


Cheers from Estonia!

The Dunker motors have 140W of power output. Together with the efficiency of the gearboxes that results in ~80W of mechanical output. I think, this should be enough for a 2DOF seat where you only need to tilt the seat. For anything that has to work against the weight of the rig (3DOF or more) it's a bit weak, IMHO.

If the motors have an encoder attached you can use a servo driver. I've used UHUs or Geckodrives but I have to admit that I this was ~15 years ago. There should be more modern drives. If they don't have encoders you can add a potentiometer or hall type angle sensor on the output shaft of the gearbox and use this a s position feedback.