Tension Transducer Specification Worksheet

Please help us help you to select the correct transducer for your application by providing some basic information. Complete as much of the application data requested as possible, then print this page and fax it to us. Use the separate Model F or TR Tension Roll Transducer worksheets for sizing F type or Tension Roll® transducers.


A. INSTRUCTIONS

The load rating of your desired tension transducers needs to be determined prior to size selection. Load rating is calculated using physical properties like the weight of the idler roll, the wrap angle on the roll, your expected web tension, and the direction of force due to web tension. The drawings below illustrate an axial (side) view of a tension-sensing roll in a machine frame for the three general web wrap orientations (Up, Down, Sideways). Record the information requested in the terms B through E below. Then use the formula below the drawing closest to your orientation to calculate your load rating, or call DFE and we calculate it for you.

B. TYPE OF WRAP

Cross out the wrap examples that do not apply.

Net Force Diagram

Note: The resultant force FT points in the same direction as the arrow on the transducer.

C. ANGLES AND IDLER WEIGHT

Record your information below.

  • B Wrap Angle:____ Degrees
    (Note: The wrap angle (B) may be calculated by subracting your mesured angle (C) from 180°. B=190 - C)
  • W = Weight of Ider Roll:______Pounds
  • FT = force on idler roll due to web tension. FT is in the same direction as the arrow on the transducer:______Degrees
  • A = Angle between FT and vertical axis:______Degrees
D. WEB CHARACTERISTICS
  • Total estimated operating tension: Max.___Pounds, Min.___Pounds
  • Type of Web Material:_______________________________________
  • Web Width: Max._____Inches, Min._____Inches
  • Basis Weight or Thickness:______Pounds
  • Web Speed: Max.______Feet per Minute, Min______Feet per Minute
E. TRANSDUCER CHARACTERISTICS(1)
  • Type: Model C ___ RS ___ RFA ___ LT ___ NW ______(specify roll width)
  • Bore Size(2) ______inches
  • Mounting Style: S (bolt) ___ FL (flange)___ PB (pillow block)___ TF* (thru-frame)___ PFL* (piloted thru-frame)-___
    *model C only
  • Load Rating*______pounds (DFE will calculate if you wish)
    *multiply formula results by 2 for RFA and LT transducers (arro on transducer points to 6 o'clock)
    Connector Position3: 3___ 6___ 9___ 12___ o'clock
TABLE 1
ANGLESINECOSINE
0"0.0001.000
5"0.0870.996
10"0.1740.985
15"0.2590.966
20"0.3420.940
25"0.4230.906
30"0.5000.866
35"0.5740.819
40"0.6430.766
45"0.7070.707
50"0.7660.643
55"0.8190.574
60"0.8660.500
65"0.9060.423
70"0.9400.342
75"0.9660.259
80"0.9850.174
85"0.9960.087
90"1.0000.000
NOTES:
  1. Refer to Model F or TR data sheet or specification for sizing
  2. Standard Model C bore sizes are size 0: 7/8 in., Size 1: 7/8in., Size 2: 1 1/4 in.
  3. 6 o'clock position is standard on Styles S and FL. Rear is standarad on PB. No optinal positions on TF.

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