Programming
D-47
DC590+ Series DC Digital Drive
Core Diameter (d)
Line Speed (S)
Reel Diameter
r
(D)
TAPER CALC
Use this to profile the tension demand with diameter.
The function uses two inputs, tension setpoint and taper setpoint, to create the tension demand. The operator usually controls these setpoints.
Taper is a common requirement for winders. It reduces the tension as the roll diameter increases.
A profiler adjusts the tension using the equation:
Diameter
Min
Diameter
Diameter
Taper
100%
Spt
Tension
Demand
Tapered
to yield a hyperbolic taper output. The taper tension characteristics are shown below:
Tension
Min
Diameter
100%
Diameter
-100% Taper
100% Taper
0% Taper
Torque
Min
Diameter
100%
Diameter
-100% Taper
0% Taper
100% Taper
The result is multiplied by TENSION SPT. to get TAPER DEMAND. When the taper setpoint is at 100%, the motor produces constant torque. That is,
a constant torque from core to full roll, and the tension falls off as the roll builds.
TENSION TRIM allows the tension demand to be adjusted, for example, when using closed loop trim. The result is TOT. TENS DEMAND.
Circumference = D or Line Speed (S) = Reel Speed ( r) x D
Thus D =
S
r
i.e. D
Line Speed (S)
Reel Speed ( r )
Therefore with the web intact we can calculate the diameter from the two speeds.
Summary of Contents for 590+ series
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Page 14: ...Cont 12...
Page 16: ...DC590 Series DC Digital Drive...
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Page 32: ...2 12 Product Overview DC590 Series DC Digital Drive...
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Page 130: ...3 96 Installing the Drive DC590 Series DC Digital Drive...
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Page 164: ...4 32 Operating the Drive DC590 Series DC Digital Drive...
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Page 174: ...5 8 Control Loops DC590 Series DC Digital Drive...
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Page 222: ...7 20 Trips and Fault Finding DC590 Series DC Digital Drive...
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Page 272: ...DC590 Series DC Digital Drive...
Page 288: ...B 16 Certification DC590 Series DC Digital Drive...
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Page 342: ...C 52 Parameter Specification Tables DC590 Series DC Digital Drive...
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Page 365: ...Programming D 21 DC590 Series DC Digital Drive Functional Description...
Page 494: ...D 150 Programming DC590 Series DC Digital Drive Programming Block Diagram Sheet 1...
Page 495: ...Programming D 151 DC590 Series DC Digital Drive Programming Block Diagram Sheet 2...
Page 496: ...D 152 Programming DC590 Series DC Digital Drive Programming Block Diagram Sheet 3...
Page 497: ...Programming D 153 DC590 Series DC Digital Drive Programming Block Diagram Sheet 4...
Page 502: ...D 158 Programming DC590 Series DC Digital Drive...
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Page 506: ...E 2 Technical Specifications DC590 Series DC Digital Drive...
Page 507: ...Technical Specifications E 3 DC590 Series DC Digital Drive...