How do I adjust the clearance of the beater to the bowl?

Please do necessary steps below depending on the type of Stand Mixer you have:

Tilt-head Stand Mixer
1. Turn speed control to OFF.
2. Unplug the stand mixer or disconnect power.
3. Tilt motor head back.
4. Turn screw SLIGHTLY counterclockwise (left) to raise the flat beater or clockwise (right) to lower the flat beater.
5. Adjust so that the flat beater just clears the surface of the bowl. If you over-adjust the screw, you may not be able to lock the motor head when it is lowered.

Bowl-lift Stand Mixer
1. Unplug the stand mixer.
2. Place bowl lift handle in the down position.
3. Attach flat beater.
4. Adjust so flat beater just clears bottom surface of the bowl when in lifted position by turning screw counterclockwise to raise the bowl and clockwise to lower the bowl. Just a slight turn is all that is required: the screw will not rotate more than 1⁄4 turn (90 degrees) in either direction. (The full range of adjustment is 1⁄2 turn or 180 degrees.)
5. Place bowl lift handle in up position to check clearance.
6. Repeat steps 4 and 5 if necessary.