Nexen MB25B 911996 Bedienungsanleitung PDF herunterladen (Seite 8)

FORM NO. L-20127-L-0513

NOTE

When installing MB Tension Sensors with

asymmetrical wrap, angle A must be on the same

side as the Pivot Point or angle A’ must be on the

side away from the Pivot Point.

ASYMMETRICAL WRAP (See Figure 12)

When angle A is less than angle B, or angle A’ is less

than B’, the web angle is asymmetrical. The force acting

perpendicular to the top plate can be computed from the

following formulae:

Wrap Angles (Check appropriate boxes.)

Angle a = 90

Angle A or A’ =

Angle B or B’ =

Angle A- B; or A’ - B’ = D

= + D

NOTE

If D

is > 25

, consult factory. If D

is < 25

proceed

with force calculation.

For Normal Wrap

Where: F = Resultant Force.

T = Web Tension.

F = (T cos A) + (T cos B)

_______+_______=_______

For Reverse Wrap

Where: F’ = Resultant Force.

T’ = Web Tension.

F’ = (T’ cos A’) + (T’ cos B’)

_______+_______=_______

FIGURE 12

Normal

Wrap

Reverse

Wrap

Pivot

Point

�

SYMMETRICAL WRAP (See Figure 11)

When angle X = angle Y, or X’= Y’, the web angle is

symmetrical. The resultant for F or F’ will act into or away

from the top plate or MB Tension Sensor at 90

. In this

condition, F or F’ can be determined by the formula:

For Normal Wrap

Where: F = Resultant Force.

T = Web Tension.

F = 2T cos X

For Reverse Wrap

Where: F’ = Resultant Force.

T’ = Web Tension.

F’ = 2T’ cos X’

WEB FORCES (continued...)

FIGURE 11

1 2 3 4 5 6 7 8 9 10 11 12 13

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