Shafts; Belt Conveyors; Screw Conveyors - Siemens milltronics MFA 4P Instruction Manual

Shafts

added paddle
safety shield not shown
These methods are viable if the speed is such that the blades or key will provide the
number of pulses required at a minimum velocity of 1.5 m / minute (5 ft. / minute). In
applications where exposed moving parts are required, safety shields and precautions
should be applied.
Where conditions prevent the sensing of buckets, a belt pulley or paddle mounted on an
exposed shaft end, preferably the tail pulley, may be used.

Belt Conveyors

Potential for damage in each application governs the minimum gap allowable. Maximum
gap for operation is 102 mm (4"), optimum 25 mm to 50 mm (1" to 2").

Screw Conveyors

The probe should be located at the idler end
(usually feed end)
A ferrous mass added behind the flight of a screw conveyor, where it passes the probe
aids Borderline Operation. This mass must be added for all non-ferrous screws.
Page 24
probe
shaft
50 x 50 x 25 mm (2" X 2"
X 1") ferrous blocks or
spoked wheel
probe
MFA 4p – INSTRUCTION MANUAL
probe
key in keyway
102 mm (4") dia. min.
shaft
probe
Arrows indicate permissible place-
ment range of the probe
7ML19985FM01