Laser Projector Christmas Repair: Fix Green & Red Laser Effects, Weak Motor, Teflon Gears Issue

The projector shines with a green and red laser but there are no effects on the wall - it becomes a motor - there are 5 plastic gears, probably Teflon ones - it seems as if the motor was too weak.

Cool effects on the wall - I would like to fix it - can someone fix it?
Ps. worked a few hours.



In this video is spinning but in a moment they will stand-you need to gently help and start ... until.

Engine power checked?
Although looking at these modes, it's just a replacement

They are not worn - in my opinion - too weak engine.
From the top comes a lid with another gear and stabilizes them all.
For now, they'll work on the table a few hours and we'll see.

What engine is there? Nothing got in modes? (some kind of fern, for example?) You can remove the grease and give it a little technical petroleum jelly - on the axles themselves - plastic modes do not need lubrication.

The engine has no markings - I think the revolutions are around 100 150 per min
I wiped off the excess grease - for now, they work - spinning ..... how long we rinse




Someone with optical knowledge will enlighten me - these are two the same types of laser.
In one on the right there are nice effects, and on the left on the ceiling from a distance of about 1 m only effects that the points ONLY rotate. What is the reason in optics?

The engine at such a low speed actually has little power and any increase in resistance can stop it. It looks like a typical motor from a CD drive - admittedly it has a slightly higher resistance in the CD but it is controlled by PWM, so it has enough power. A drastic reduction in power can also be associated with a blamed commutator - in the event of a problem with replacing the motor (if it still blocks) it can help to disassemble it and wash the commutator's IPA and brushes (they are made of thin strips of metal plate). It can be demolished, but it is quite embarrassing (the plate closing the bottom of the housing is pressed), because it is not very much like catching this plate ...
As for the effects - in front of the lens (or maybe on it) there is probably a diffraction grating (practically invisible or only at the right viewing angle and lighting) - a visible plate on one of the photos. Such a grid splits the laser beams into several dozen smaller ones (hence the effect as on the right). Whether they will be focused beams or points depends (I think) on the focus of the beams from both lasers and the grid itself.

In fact, you were right - I did not put on this black cap with a plate.
After putting on - all ok.


Ps. After cleaning the excess grease - after a few hours I got only one laser (I pushed and walks on), the other is ok. The problem is the grease - thickens at a lower temperature and with a low power engine it gets.It's at 95%.