I think I dont understand how the world scale behaves.

I am almost a beginner. I was working on a simple gimbal design to train myself about how the msphysics work where I used milimeters and my model was relatively small. Trying the joints, springs (especially this one is very very tricky) I was almost going crazy as the system I designed behaved unpredictable. As a beginner, first I thought I was doing mistakes but then I realized that my model was too small so after reading Anton's wiki I played with World Scale and increased it but still I can't get it work properly. If I draw my model scale from mm to cm then it works somehow.

So my question is what is the scale of the "World Scale"? It seem very relative. I dont know how to use it. How will I know how much I have to increase to match up the 1:1 world physics of my milimeter.

Thank you Anton.

When I draw complex objects like curved cams I see that compound from CD is not working properly. I see some leftover lines when I check with collision wireframe. What can I do about it. A sample picture is attached?

The cam model is mirrored and grouped as single.

I exported the SP animation to KerkyThea and rendered directly. Kerkythea saved everyframe to my desktop within a folder (which is starting with "Anim_*") in jpg format. Then I used the free MakeAVI software to merge all the jpg's as a movie.

I am not happy with the quality and the flickering of the shadows. I don't know how to fine tune KerkyThea.

Hello again and thank you very much. I am able to make it work with your advise. You can view the final result in my video below. Sorry for the poor quality of my rendering. The very first rendering.

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

Thank you for your answer. Yes you understand correctly. the spring must follow the arc. I will try your suggestion asap. I hope I can do it as it is a little bit complicated for me. I need to level up.

Hi!

I cant find a solution for this problem on my own. I need your help.

I am trying to build a Joystick gimbal. The mechanism is very strait forward and simple. I want to test the forces and behavior on sketchy physics. Well... trying to animate it with sketchy physics turned to be another challenge for me.

As you already know it a joystick will move in 2 DOF; X,Y axis. You push, pull and yaw it and when the force is released it turns back to the original state. To model this behavior I need to use spring joint but they work only in linear motion, on the other hand the gimbal rotates in circular motion. So it locks the motion only in one axis and because of that the hinges wont rotate. How can I solve this problem with sketchy physics?

Simply asking "How can I turn back a mechanism to its original state when the force is released?"