Impeller 2

Note that the Default Lead can be either set to In or Out for all situations.

1. Click the Default Lead- In/Out button and set the parameters as shown in the following image:
   
   

2. Click OK.

3. Click Collision Control to switch it from OFF to ON.
   

4. Now, mark the Check Surfaces check box and click Check Surfaces.
   

5. Select the walls and floor as check surfaces.