Showroom Adding surge DOF to my sim.

Hi.

Previously I added traction loss to my sim. You can see the build here.
https://www.xsimulator.net/community/threads/building-traction-loss-platform-for-my-rig.17516/

Now I just finished adding surge DOF and want to show how I did it here.

This is how I planned to install it. The cyan color frame is the new platform that I put inside the existing structure. I put it inside instead of adding another layer because I didn't want to add too much height to my simulator.


For the actuator, I am using the same setup as my t/loss platform.


To suspend the surge platform inside the existing frame, I use this type of linear slider.

Good thing about this slider is that they can be mounted in any orientation and still maintain the rated load. So I just mount them at the side of 8040 alum frame sideways without the need of additional support structure.

I use 4 of them to hold the platform at each corner.
This is the front right one.


And this is the rear right one.


From under neigh you can see how I use aluminum L bracket to attach the frame to the slider (yellow circle).
The green circle is the actuator seen from below.

This is how it looks like finished.

How many mm/s are the actuators ?

200mm. But only use 160mm(80mm one way).

I took advantage of the surge motion to create a seat belt tensioner system.
Those 2 shining chrome plated tubes are used create a pulley system where the belts are pulled 2 times the surge motion length when braking.

How the seat belt tensioner works.

I think the sim needs to move backwards when you brake so your feet and hands push onto the pedals and wheel.

I found out that for surge axis there are 2 ways to do it.

1. Seat, pedal & wheel move together. It moves forward when accelerating and backward when braking like real car but gives temporary sensation of acceleration & braking.

2. Seat & pedal move together while wheel is static. Moves backward when accelerating and forward when braking. Gives prolong sensation of acceleration & braking by pulling and pushing the driver against the wheel.

I choose the 2nd one. If you notice in this picture, wheel posts are attached to the static frame.

Ah did not realise the wheel is static

What model motors did you use?

https://www.aliexpress.com/item/1005003203050307.html?spm=a2g0o.productlist.main.17.3578476ea8SiW7&algo_pvid=5a135e2b-229c-4d07-b086-81554993ed9b&algo_exp_id=5a135e2b-229c-4d07-b086-81554993ed9b-8&pdp_ext_f={"sku_id":"12000024642339064"}&pdp_npi=2@dis!MYR!544.88!381.4!!!!!@211bd93f16750952244594745d0717!12000024642339064!sea&curPageLogUid=DrfEhXbqrZtW

only 0.6nm is able to lift the platform?

Paired with 4mm pitch ball screw it can lift 80kg at 100mm/s per actuator.

Also since I added surge platform, I make a spring actuator near the rear actuator to lessen some load.