It always grinds very fine. I am unable to change

That one is hard to explain but I will try. On the front of the grinder is the adjustment wheel, on the wheel is a small screw, if you put your hand on the wheel it might be about 1/4 inch from the front, back up screw about 1/2 turn or more then make sure the grinder is on 3 or espresso, make sure you can pull out front part of the wheel ONLY. If not back up screw a little more and try again, now that it can move freely without moving the numbers, pull it out and turn it to about 5 or 6 then turn grinder on and very SLOWLY, (This is the dangerous part do not go to fast or you could damage the grinder) turn towards trukish grind when you get close you will hear the burrs slightly touching. Back off the knob a little just before the touching part and turn grinder off. Then pull knob out and turn it to turkish and set screw.