Hello.
I have just started Unity and also my native language is not English.
I hope you will forgive me that I'm not good at English.
I want to make a conveyor that carries objects by rotating rollers.
However, if the weight of the object is much greater than the rollers, collider will not work well and the object slips through the rollers and fall.
After some verification, this phenomenon is more pronounced when the mass of the object is more than five times greater than the roller.
The following procedure can reproduce this phenomenon.
1. Create rollers with Cylinder, work object with Cube.
(Create a floor with Plane if necessary.)
Cylinder Scale : (x, y, z) = (0.25, 1, 0.25)
Cube Scale : (x, y, z) = (1, 1, 1)
2. Add Component the Rigidbody to the Cube and the Cylinder.
Cylinder : Don't use Gravity, Position freeze All, Rotation freeze X and Z axis.
Cube : Use Gravity, Position & Rotation are All free.
The initial value of mass is set to “1” for both.
(Make sure that Add Component the Cylinder with Capsule collider, the Cube with Box collider.)
3. Add Component the Constant force to the Cylinder.
Set the value of Relative Torque (x, y, z) = (0, 1, 0) or (0, -1, 0).
Depending on the direction of rotation (Clockwise or Counterclockwise), the value should be positive or negative.
4. Adjust the position so that Cube in the middle of rollers when playback starts.
5. Verify this by changing the mass of Cube slightly and playing it back several times.
(I have verified this by changing the mass of Cube to 1, 2, 3, 4, 5, 10, 50, 100.)
**・Cube mass = 10 (Cylinder mass = 1)**
![alt text][1]
**・Cube mass = 50 (Cylinder mass = 1)**
![alt text][2]
My verification results show that strange physical behavior started to occur when the Cube became more than 5 times the mass of Cylinder, and then this behavior became more pronounced as the mass increased.
(Above 5 kg, Cube began to sink into Cylinder, and above 50 kg it dropped completely down.)
How can I fix this problem?
(OS : Windows10, Unity : 2021.3.6f1)
[1]: /storage/temp/199286-cubemass-10.png
[2]: /storage/temp/199287-cubemass-50.png
↧