FMS CMGZ433 Series, Руководство по эксплуатации

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Operating Manual CMGZ433
18
Mathematical method
If the material tension cannot be simulated, calibration has to be done by calculation. This
way of calibrating is less accurate because the exact angles are often unknown and the
effective mounting conditions, which usually deviate from the ideal, are not taken into
account.
•
Offset adjustment has to be done as described under „Simulating method“.
•
The Gain value will be calculated by the following formula and then inputted in the
parameter
gain feedback (refer to „11. Parametrization“).
fig. 14: Force vectors in the FMS force measuring bearing
C431012e
Definition of symbols:
α
angle between vertical and measuring
web axis F
B
material tension
β
angle between vertical and F
M
F
G
roller weight
γ
wrap angle of material F
M
measuring force resulting from F
B
γ
1
entry angle of material F
Meff
effective measuring force
γ
2
exit angle of material n number of force sensors
δ
Angle between measuring web axis and F
M
( ) GainFeedback
n
=
⋅ ⋅
1
2 sin sin /
δ γ