The cutting disc on my makita 5806b spins anti clockwise causing damage if i cut laminate from the top and i need it to spin clockwise

try turning the plug around

https://www.toolpartsdirect.com/makita-3700b-laminate-trimmer.html

the screw will be left hand thread so turn it clockwise to undo it

1 inch to 20mm Brass Ring Adapter Reducer Bushing for Diamond Saw Blades
Or is the flange of the blade sometimes wrong, the flange where the blade sits on can sometimes accidentally reversed and then you're on a bevel

The button does not disengage the blade, it only locks the blade/motor from spinning so you can remove the locking nut. Lock the spindle/motor/ blade, from moving and then remove the locking nut or disk. Should be counter-clockwise.

check inside for any loose connections plus check the brushes. if like you say it is smoking it could be a trip to the wheelie bin for that one.

you can try going to Makitatools.com and downloading a breakdown for this tool. If it arcing badly at brushes there could be a wiring problem or damage to the armature, check the wiring first and also the wheel spinning off might mean that you are running in reverse. did you take the field out of it and if so it might be in 180 degrees out. Let me know

You may have cuttings building up in the slide, throwing it out of alignment and causing offset tension.....

There is a nut that you release from the middle of the grinder wheel, (grinder blade)
This nut is flat and has four holes in it.

You will see you are providing a spanner wrench to remove this nut. The wrenches' actual name is Lock Nut Wrench. It has a U shaped end with two pins sticking out. On on each side of the U shape.

The pins are inserted into the holes in the flat lock nut, located in the middle of the grinding wheel. The wrench is laid flat against the grinding wheel, with the two pins of the wrench going into any two holes of the nut.

At the top of the Makita grinder you will see a Black button. The button is pushed down to keep the grinding wheel from spinning. Holds the grinding wheel in place, as you turn the lock nut loose. When you release the button, a spring inside pushes the button back up out of the way.

As you view the Makita grinder, Release Button towards the Back, grinding wheel towards you, the nut is turned to the LEFT, to loosen. It is a Left threaded nut.

The grinding wheel spins to the Right. Using a left threaded nut insures that the nut will stay tight, due to the direction the grinding wheel spins.

check for a capacitor on the motor if it has one, replace that to start with, that what it sounds like