Operation - Siemens Milltronics MMI Instruction Manual

Operation

Each MSI weighbridge is designed to react only to the vertical component of the force
being applied to it. Each MSI consists essentially of a fixed support frame (static) and a
live frame (dynamic).
The static assembly is used to mount each MSI between the conveyor stringers and
supports the weighing assembly via its load cells.
The weighing assembly supports the scale idler and transfers the weight of the material
to the load cells. These are the active components in the weighing assembly.
As the material travels along the conveyor belt, a force is exerted through the suspended
idler onto the weighing assembly. The weighing assembly is forced down proportionally.
The movement in each load cell is sensed by its strain gauges when excited by voltage
from the electronic integrator and produces a signal proportional to weight, which is
returned to the integrator. The movement in each load cell is limited by the positive stop
incorporated in the design of the load cell.
idler bracket
Page 4 Milltronics MMI Belt Scale – INSTRUCTION MANUAL
test weight bar
force
idler clip
idler frame
scale mounting
bracket
dynamic beam
weighbridge
static beam
7ML19985DR02