Max Machinery 284-512 SERIES TRANSMITTERS - Manual (Page 9)

284-512-350 © 1990 (Rev 6/97) Max Machinery, Inc. Page 9
Photo Disk Assembly
The Max 210 Piston Series Flow Meters have a sinusoidal type motion superimposed on the
overall rotary motion. This motion, when coupled to the 284 through the magnetic drive
system, will cause the photo disk of the 284 to oscillate at the systems resonant frequency. For
this reason, there is a friction disk mounted between the arbor of the 284 and the photo disk.
If the photo disk and shaft assembly is to be disassembled, care should be taken when it is
reassembled. A small trace of molybdenum sulfide grease should be placed on the face and
bore of the brass arbor which the photo disk is fastened to. The locking collar must not be
forced up too tightly against the photo disk. About a 0.005 gap should be left, which allows
the disk some freedom of movement. The spring keeps the disk and shaft in synchronization.
Photo Disk Assembly
Discontinued