aarondc's nDOF rig

yep thats right, same here

Where did you get the PN18 pipe? My thoughts were to build a rig, then when I make it mobile, stick the PVC rig on a wooden platform of some sort.

Oh wait - so that 50mm pipe with 60mm diameter sounds ok then? Look friggin beefy in the shop. I didn't buy any of that to make the rig yet. I bought 15mm stuff to muck around with coz it's so friggin cheap. Once I have a good handle on how it works and what I can do with it, I will design a rig based on simul8rs and then look at getting the PVC to build it up.

Yes you could sit the whole top frame on a big sheet of ply I suppose, that would sturdy it up.
PN18 Pipe, I bought from a wholesaler as plumbing supplies were 3-4 times the price.
http://www.totaleden.com.au/ there sales office is in Melbourne and I picked up from a local warehouse near to me.
Pn18 pipe 5.2mm wall
PN12 pipe 2.6mm wall ( thanks for the info Rob)
ANd it was lighter than the steel frame I originally had on it. Pic attached

Thicker the better.
Yes its beefy for sure, but thats because its PVC and not steel.
Did you figure out what sort of sim?
2 DOF with pivot?
3 DOF ?
2.5 DOF (2 dof with drift)?

(The PVC connectors I bought are PN18, I just noticed.)

No, no decision as yet. This project is one of 10 ideas I have had since I started doing Arduino development a couple of months ago.

First up is a small robot so I can learn all about PWM, PID, power supplies, motor drivers, etc, etc. While I am doing that, I can play around with PVC because the PVC rig can be used regardless of which DOF system I decide on. That's the theory at least.

As I prefer flight to driving, I am leaning towards 3DOF (heave, pitch, roll), but that's a very naive view based on what I would like to do, as opposed to understanding the motor systems available, how to implement them for the DOF I want, and other pertinent details.

Someone posted a 3DOF with a shock absorber underneath that looked pretty handy. The rods connected to the platform were crazy long though. Why are they so long? A few people suggested shortening them and I could not agree more heheh.

As I do not weld, I am pondering how to connect rods to motors and what not. Lots of variables to account for here.

The link is for Aldoz 3DOF, and he uses boat winch motors and JRKS. I posted it for you.
The spring was a curly one from what I understand, as it was calculated to specifics.
Probably why its so tall

Yeah he burnt the jrks out too, didn't he? not something I am keen on doing...

I liked the design - it had good range of movement, but the pivot via the shock means you can kind of cheat on motor power requirements.

Read the whole thread, he burnt out the first set from a bad setup, not JRKS fault.
I have blown 5 in my time from owner operator stupidity.
I sent you a PM by the way.

Thats the idea

Oh nod - user error for sure.

1d-o1t error

PEBKAC - problem exists between keyboard and chip

I don't have a gaming machine, so I started looking into those today. I have an iMac for photo editing and my now work laptop was bought for portable video editing.

A gaming machine would be good for separating personal BS from work BS too. But I digress...

The real reason I wanted to post today was this: ultra short throw projectors. Down to around 20cm for an 80cm wide image now, according to some review I read on the Ricoh ust projector.

I'm wondering if a properly designed front end could allow you to harbour a projector under the steering wheel and still get the FOV projection happening.

Look for a quad core CPU, at least 4 gig ram, fat graphics card, BIG psu.
go to a local PC shop and get one made up.

yes

A short throw lens maybe or software to help. Rear projection on a dome has been done here before to a good effect, lol , sorry off topic.

Just curious where you get those ball socket (??) rods that attach to the motors, etc, for platform movement?

I don't really even know what they are called...

http://www.linearbearings.com.au/Produc ... fault.aspx

Rod Ends , located in Melbourne too, I use 8mm