Building traction loss platform for my rig

Hi,
I decided to add 1 more DOF to my motion simulator and I think rear traction loss would be the most that I wanted.

This is my current rig.


This is plan for the TL platform.

And when it's finished will look something like this

For the motor/actuator, I'm going to use the same motor that I use for the 4 legs actuators. They are 180w integrated servomotors. 'Integrated' means that the driver are built in inside the motor assembly.
But for the TL, I'm going to couple the motor with a 'linear motion guide rail' that I found on aliexpress.

It looks like this.



I don't have a picture but this linear rail perfectly match the motor that I am using (nema 23 size). With 5mm pitch, the combination can push up to 80kg of force at low speed and around 60kg at around 100mm/s (given the power is only 180w). But that is enough for TL I think

The construction are made using mild steel. Because I don't have good welding skill, I decided to go with bolts and nuts. I'm using 1.5" x 3" steel tube for the upper platform and 0.25" x 3" steel flat bar for the base.

This is my progress so far:

I'm using 4080 aluminum profile right angle bracket to fix the tubes together. The picture only show 4 of the brackets because I'm out of stock right now. It should be 8 of them as in the plan.

I'm using bolt and rivnut(combination of rivet and nut) to tighten the bracket to the steel. It easier this way especially when I need to use a bolt at the middle of a long tube.




And this is the steel plate that I cut for the base


That is my progress so far. I will continue during my next off day.

what is the speed in mm/s

The controller can drive it up to 200mm/s. But I limit it to 100mm/s due to only 180w power and weight. Don't want to trigger the safety cutoff.

consider a gear motor combo that will allow a faster mm/s experience

Thanks for the suggestion. The main reason I'm using this motor is because I have few of them already. Maybe I'll try to increase the speed until safety cutoff happen and then dial it down a little to get to max speed possible.

use 2 motors - one on each end of the ballscrew

use a pitch with less turns on the ball screw

This opens my eyes. But I don't have the ability to modify the ballscrew assy to fit a motor at both end.
Later if I don't like the outcome from the 180w motor, maybe I'll just replace it with 400w version. But for now to save budget I'll just use what I have.

Yesterday I received the bearing housing for the front end pivot point.


This is how it is going to be mounted

Merry Christmast everyone!

Some new pictures


This is the motor & linear slider combination

After wrapping with fake carbon fiber warp


I stick some furniture floor pads underneath to protect flooring

Previously I was worried about the motor low power (180w). It turns out to be ok. The motor is barely warm after a prolong use.

And I don't think a very high speed actuator is needed for traction loss. Most of the time the TL output from simtools are slower than my actuator can handle.

Here is the video.

awesome project. have link for the motors?

I had your same question and I scowered the site and eventually found them on a different project hes posted called "Adding surge DOF to my sim".

I would link to the post but I can't have links yet lol