As a newbie in physics I imagine this device and I would like to know why it can't increase its energy.

The device:

I imagine 7 gears in rotation around blue axis in clockwise. Each gear has a mass $m$. In the same time, gears are turning at $w2$ around themselves. One clockwise next one counterclockwise like gears. But like I have 7 gears (odd number), 2 gears rotate in the same direction (2 red gears at bottom). I know 2 red gears at bottom can't turn like gears but I don't want gears but friction, it's possible to imagine a part of gear with rough surface only and study the device during a little while. So, between these gears I would like only friction. This friction give heating and forces $F1$ and $F2$, others gears give forces too, $F3$, $F4$ etc. I try to draw all forces but maybe I'm wrong.

G1 can have mass or not

If I want I can take a gear (or 5 gears except 2 reds where there is friction) without mass (or very low in practise). In this case how energy can be the same (I count all energies, heating too)?

To draw forces, I'm starting from forces F1 and F2 and after I draw forces at right and at left in the same time, until I arrive at G1 (I'm not sure).

1/ G1 has mass, it has a clockwise torque so its kinetic energy is increasing, but forces give a counterclockwise torque on blue axis and reduce kinetics energy. The sum seems to be ok for me in this case.

2/ G1 don't have mass, the clockwise torque don't increase kinetic energy because there is no mass. So the sum of energy seems to decrease.

The cycle is:

1. I launch gears at $w1$ and $w2$ without friction between red/red gears, this step need the energy $E$. Friction is OFF.
2. I set friction ON between red/red gears
3. I count all energies, $E$ must be constant. I'm interesting about the transcient analysis when there is friction between red/red gears. From time $t=0$ to $t=t_x$, with $t_x$ very small.

How $E$ could be constant?

Note:

I need to press 2 red gears at bottom for have friction, but I don't drawn these forces.

I guess no friction elsewhere than red/red gears surface.

I don't believe in perpetuum mobile but I imagine devices, and like puzzles to resolve, I try to understand how the sum of energy is conserved, like that I learn physics in the same time. It's like a game for me.