G
Gazzer
Burning deffos not a good sign.Take it back to place it was purchased.You should get a lot longer than 9 months work out of it.Personally i think the dust does loads of damage to the grinders and as Radim said ,compressed air gun every now and again should help the life of the grinder.
When i do any maintenance on grinders, drills or wet saws, the 1st thing I do is blow around the motor with compressed air. Its amaing how much comes out, cant be good for it at all.