Self-propelled wagons

[eyore]

Loaded my two new wagons into the game but had a couple of problems.

Firstly, they touch but don't couple and secondly, they are self-propelled!

As can be seen in the video clip, they sit there quite happily until I activate the loco, then they set off in opposite directions down the track.

http://www.youtube.com/watch?v=da8zZ1i030Q

I know someone else had a similar issue and wondered if they found the answer?

[Ooveecouk]

Look like it could be a collision zone issue?

[Kitform]

Check your collision box and also check your pivot points.

[eyore]

Well, it gets worse!

I have three axles turning at double the normal speed and one not turning at all. (I've checked the orientation and all the radii)

I can place the wagons next to each other but as soon as anything in sight moves the wagons continue to repel each other, but their wheels are going the wrong way round. (I've tried altering pivot points and collision width/length/height).

And they still won't couple

I think I'll go back to doing scenery items, this rolling stock lark is insane!

[haddock1000]

can you connect them with the loco?

if no, then it is a collision box issue, play around with the collision boxes.

if yes then I'm sorry, i haven't a clue!

thanks,

chaddockdk

[eyore]

Ok, I've solved some of the problems which, to be honest were my own fault. I had managed to get a bogie wheelset name wrong (O instead of 0) and I should have guessed, when the blueprint asked for axle diameter it didn't mean that at all. Anyway, the wheels now all go round at the right speed and in the right direction.

The two trucks now couple to each other but not to anything else and they still run away down the track when a loco approaches, but they run towards the loco when there is a wagon attached to it. Weird!

I have poured through the documents, I have used Context to compare my files with others and checked and re-checked my figures, but cannot get to the bottom of this problem. I'm obviously doing something wrong but I can't see what it is.

Is there a physics expert out there willing to have a look for me and tell me what I'm doing wrong?

[Kitform]

It's your collision box/pivot points that are the problem, they can cause strange effects.
You may need to post up the relevant section of your blue print and the dimensions of your wagon.

[eyore]

It's your collision box/pivot points that are the problem, they can cause strange effects.
You may need to post up the relevant section of your blue print and the dimensions of your wagon.

As suggested here are the blueprint and measurements.

[Kitform]

Hmm, you've got bogies.
Anyway...Your front and back x pivots are 2.7 each giving a total vehicle length of 5.4
You have your Collision box set at 5.3, that doesn't leave much room for the couplings, try reducing your collision box size to say 5.1.

[eyore]

Hmm, you've got bogies.
Anyway...Your front and back x pivots are 2.7 each giving a total vehicle length of 5.4
You have your Collision box set at 5.3, that doesn't leave much room for the couplings, try reducing your collision box size to say 5.1.

Thanks for your interest, as its driving me crazy. I want to solve this one as I don't want the same problem when I get involved in further rolling stock for the route.

Tried reducing the collision box and when I got down to 4.9 the wagons started to couple to other items of rolling stock, although the couplings themselves, would disappear. Unfortunately, the wagons still keep rolling towards the loco under their own volition. The movement is so strong I need 8/9% regulator to stop them pushing the loco backwards.

[Kitform]

The measurements you gave...Are they from the drawing or did you take measurements from your 3D drawing?
The reason I ask is that you may have a scale issue.
I presume you used the asset editor to fix the position of the couplings?

[eyore]

The measurements you gave...Are they from the drawing or did you take measurements from your 3D drawing?
The reason I ask is that you may have a scale issue.
I presume you used the asset editor to fix the position of the couplings?

The measurements are from the .max file not the dwg. I have even checked them by creating a new box primitive scaled to fit round the model.

I use the asset editor for attaching the couplings but I do fine tune them with RWTools to make them equal in height and distance, but we're talking 1/100's here.

[longbow]

I have had wagons behave as you describe, so you likely just have a rogue number in your blueprints.

1) The front pivot y value is usually -0.5 not 0.5
2) Collision L is the length of vehicle ex buffers which looks to be about 4.7m not 5.3m
3) Using your drawing and the formulas in the RW Wiki I calculate a collision centre Y of 0.85m and Collision H of 0.66m which are a bit different to yours

You don't show your bogie blueprint settings but I calculate wheel radius 0.26m, Bogie pivot x 1.575 and y 0.5, horizontal offset 0.36m, Pivot Offset X/Y=0.

[eyore]

I have had wagons behave as you describe, so you likely just have a rogue number in your blueprints.

I totally agree, but its identifying which parameter that is driving me crazy

1) The front pivot y value is usually -0.5 not 0.5

Don't understand why it should be negative but gave it a try, but no luck

2) Collision L is the length of vehicle ex buffers which looks to be about 4.7m not 5.3m

Can see what you mean and have reduced the collision length in steps down to 4.2, without success.

3) Using your drawing and the formulas in the RW Wiki I calculate a collision centre Y of 0.85m and Collision H of 0.66m which are a bit different to yours

My figures are based on the wiki calcs and the 3dsmax sizes

You don't show your bogie blueprint settings but I calculate wheel radius 0.26m, Bogie pivot x 1.575 and y 0.5, horizontal offset 0.36m, Pivot Offset X/Y=0.

You're reasonably close, actuals are wheel radius 0.225, offset 0.375, bogey pivot x 1.65 and y 0.7.

Thanks for your input David, but I'm afraid it still won't work.

[Kitform]

Took me all afternoon to get this wagon to do this...LOL
I've made the collision box bigger than the combined pivot points...
Watch the last wagon.
http://www.screentoaster.com/watch/stUE ... xcU1pZUFFW

Here's another, this time coupling to oversized pivot's...
http://www.screentoaster.com/watch/stUE ... xdWVpaXlRS