The Powerful Trio

Okay, so your robotic arm does not pick heavy objects and you cant keep adding Gear Systems (there are really expensive!). So what do you do?

Maybe, you should use the Powerful Trio - Force, Surface Area and Pressure into use. Let me first give you the definitions of the three concepts:

Surface Area: A mathematical term that tells us how much surface is exposed
Force: Any external influence that makes an object move.
Pressure: Force applied per unit area.

Using all three, you can spread the force to an area. Lets take an example of this object lifter:

This lifter has a cool gear system. But notice the Arm is attached through the small axle. It has a small area of contact on the Long L Clip.

Less the surface area, more is the net pressure on the area of contact. And the resultant force on the shaft of the motor makes it difficult to pick objects.

Here's the solution. Design the robot in such a way so that the pressure is distributed to different contact points.

This Object Lifter can lift greater load as we now have two points of contact where pressure is well distributed.

The Powerful Trio definitely makes your robot more powerful!!