Reconditioning The Stack Interface; Figure 7.1 Reconditioning Stack Mating Surface - Emerson Branson LPX Instruction Manual

7.2

Reconditioning the Stack Interface

Ultrasonic system components work most efficiently when the mating surfaces of the
Converter-and-Horn combination (also called a "Stack") are flat, in solid contact, and free
from fretting corrosion. Fretting corrosion refers to a black, crusty build-up, resulting from
friction between metal parts, that appears on the Stack mating surfaces. Poor contact
between mating surfaces wastes power output, makes tuning difficult, increases noise and
heat, and may cause damage to the converter.
7.2.1 Refacing the Mating Surfaces
NOTICE
Never clean the Converter or Horn mating surfaces with a buffing wheel.
1. Disassemble the Converter/Horn Stack and wipe the mating surfaces with a clean cloth or paper
towel
2. Examine all mating surfaces. If any mating surface shows corrosion or a hard, dark deposit,
recondition it
3. If necessary, remove the threaded stud from the part
4. Tape a clean sheet of #400 (or finer) grit emery cloth to a clean, smooth, flat surface (such as a
sheet of plate glass)

Figure 7.1 Reconditioning Stack Mating Surface

NOTICE
Be careful to avoid tilting the part and losing flatness of the surface. Doing so may
make the system inoperative, due to improper mating surfaces.
70
Tape
#400 Emery
Cloth
100-412-196 REV. 06