Tension Roll 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. 

A. ROLL AND SHAFT CONFIGURATION 

tr_specsheet-diag.jpg

  tr_spec-tabl1.jpgtr_spec-tabl2.jpgtr_spec-tabl3.jpg

B. WEB CHARACTERISTICS

Total estimated operating tension:  Max. _____ Pounds,  Min. _____ Pounds

Type of Web Material:  _______________________________ NOTE: If more than one material is used, give information for the two requiring the most and    least tension.

Web Width: Max. _____ Inches,  Min. _____ Inches

Basis Weight or Thickness: _____ Pounds

Web Speed: Max.  _____ Feet Per Minute,  Min _____ Feet Per Minute

C. SPECIAL FEATURES: ______________________________________________________________

D. LOAD RATING CALCULATION

    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. 

     Cross out the wrap examples that do not apply.

table1-angles.jpg

  netforce.tespec.jpg

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

 Standard Load Ratings are:   Size 0 = 12, 25, 50, 100 lbstr_spec-tabl4.jpg

                                           Size 1 = 12, 25, 50, 100, 150 lbs.

                                           Size 2 = 12, 25, 50, 100, 200, 400 lbs.

E. ANGLES AND IDLER WEIGHT

    Record your information below.

  B = Wrap Angle: _____ Degrees  (Note: The wrap angle (B) may be calculated by subtracting    your measured angle (C) from 180°.  B = 180 - C)

W = Weight of Idler 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

C = face width of roll (inches). Refer to Note 3 for other roll materials.

NOTES:

  1. Any covering applied to the roll will affect the load rating calculation. 
  2. Consult factory for sizing of units with steel of stainless steel rolls.
  3. Refer to TR Transducer data sheet for length limitations, W formulas, options, and accessories.

Company Information 

Name: ______________________________  Company: ____________________________________________

Address: ___________________________________________________________________________________

City: ______________________________________  State: _______________ Zip: ______________________

Country: ___________________________________  Email: _________________________________________

Phone: _____________________________________  Fax: __________________________________________


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