Problems with GravityDirection

Hello,

Robot is palletizing boxes in two rows. Each box consists of three different parts. For that I have to use MultiGrasp. I am also using a GravityDirection. Everything works well up to that point when it comes to releasing the pallet. Some boxes and parts will remain suspended in the air and will not go with the pallet. GravityDirection is by default 25, in this situation, no box will go with the pallet. When I select 120, the pallet moves a few centimeters and stops. When I select 119, it leaves some boxes and parts behind.

I’ve changed the conveyors, the robot, the pallets. Also, I’ve tried different settings. Unfortunately, I haven’t got it to work properly.

How do I resolve this situation?