6 DOF simulator - chain / belt driven

Since months I am pondering on a chain driven 6DOF. This thread is now reserved for future postings about an other kind of 6DOF which has - as far as I know - never build before. This can be realized in an easy way and should not to be too expensive. IMHO the chain / belt driven system can be very effective, very fast, less noisy and cheap(er than any former DIY actuator 6DOF). Stay tuned

Thread watched and good luck

Exciting !! As always @Pit it will be very innovative if you build it

Sounds like a good idea @Pit. I will be interested to see how you end up connecting the chain to make an actuator.

Still fiddling and tinkering, need a better skill of SketchUp, but progress is not too far away from now

some progress, but pre alpha...

more progress, almost beta:

good project! nice drawings @Pit

my 50 cents:
- if the shear forces are too high (chain not aligned with bracket), you could use 2 rods with the chain in the middle
- I think it will be noisy
- where is the chain tensionner?

Thank you mate for your feedback

IMO the guided rail should handle the forces.

I think I will use belts

+1

Ce système à l'avantage d'être robuste, mais sera bruyant et il sera très difficile de maintenir la chaine suffisamment tendue.

This system has the advantage of being robust, but will be noisy and it will be very difficult to maintain sufficiently tight chain.

With PMDC motors a gearbox will be needed.

first of all I will choose a belt driven system, second the motor is a standard 24/36v geared motor nothing special. The motor on the photo is only for demonstration only

I don’t have any experience using linear bearings but I would be a little concerned about the side forces put on a single bearing and it holding up over time. Even if you don’t think a second rod is needed, I would consider adding a second linear bearing an inch or two above or below the main bearing. The second bearing wouldn’t necessarily need to be attached to the belt, but firmly linked to the main bearing to help keep it aligned so the side force stresses on the main bearing are minimized and shared by the second bearing which will have more leverage against side forces.

rgr

My first simulator had a chain ,a steel rod and a geared 1/2HP AC motor ... see next video to have a fast good look ... maybe a shorter one would be effective with you .

OMG, of course Speedy our Ingenieur of DIY did it already, nice to see how you designed it. I'll try to create a less complex (big) design but close to yours.

Now I'm sure it's in the hands of a better DIYer ...

- The chain tensioner is the motor mounting plate itself ... just untighten its slotted 4 big bolts and the gravity would do the rest ... or left the motor about 3cm up to have enough space to unhook the chain .
- The top Sprocket bridge could be beside any of the top teflon aligning rings ... I put it beside the bottom one to have the maximum movement control over the steel bar and to give a longer motion range .
- Use the other chain center to mount a piece or two of rigid plastic to gain a stop point with a limit switch .


Good by Gina !!!

if there's something to smoke, Pit is our man!