Parker 690+ series - Page 125

Programming Your Application 1-117
690+ Series Frequency Inverter
Hyperbolic Taper
A fixed hyperbolic taper characteristic is supplied with this block which has gives the following
tension characteristics:-
Te n s io n
Diam eter
Min
Diam eter
100%
Diameter
-100% Taper
100% Taper
0% Taper
To r q u e
Diameter
Min
Diam eter
100%
Diam eter
-100% Taper
0% Taper
100% Taper
• If the Taper input is 0% this gives a constant tension characteristic with diameter.
• If the taper input is between 0 and 100%, this gives tension falling with increasing diameter.
This is sometimes known as negative taper.
• If the taper input is between 0 and -100%, this gives tension rising with increasing diameter.
This is sometimes known as positive taper.
All taper characteristics start at the tension setpoint, at minimum diameter.
The following equation shows the actual taper calculation (ignoring boost and stall).
⎭
⎬
⎫
⎩
⎨
⎧
⎟
⎠
⎞
⎜
⎝
⎛
−×−×=
Diameter
Core
1Taper100%Spt TensionDemand Tapered
Linear Taper
0% 20% 40% 60% 80% 100% 120%
0%
20%
40%
60%
80%
100%
Taper =
-100
-80
-60
-40
-20
0
20
40
60
80
100
Diameter
Tension
(){}
Core-DiameterTaper100%Spt TensionDemand Tapered ×−×=