Control Of Excessive Winding Tension; Internal Reel Diam Eter Taper Control - Mitsubishi LE-40MTA-E Instruction Manual

7.3 Control of excessive winding tension

1. Outline of taper control
Such control as to increase/decrease the working tension, depending on the change in winding diameter
is called "Taper tension control", in which the tension is controlled in accordance with the preset pattern,
to suit the change in winding diameter. This function is mainly used to prevent the material from winding
too tight or too loose on the reel.
Following two methods are peresently available to determine the current reel diameter:
(1) By calculating internal reel diameter.
(2) By entering the reel diameter externally through analog voltage (high precision taper ten
control is possible).
In the internal reel diameter calculation, the reel diameter is calculated based on the torque control out-
put. Since it is not necessary to enter the reel diameter, the accuracy is not very high.
Two methods are available to set the taper ratio as follows :
(1) By setting the taper ratio (key entry) internally.
(2) By entering the taper ratio externally through analog voltage.
Two methods are available to enter the taper curves as follows :
(1) Linear line taper control.
(2) Non-linear line taper control.
Internal
tension setting
Internal taper
ratio setting
External taper
ratio setting
AI2
AI3
AI2
AI3
External reel
diameter
Taper reel
diameter
Outside
Taper ratio
Selection
Reel diameter
Items in square are set
on the panel surface
Torque control output
Tension
detected
Inside
Calculation of
internal winding
diameter
Calculation of
Linear line
linear line
taper
Calculation of
non-linear
line taper
Non-linear line
Data table corner 1~4
Taper 1~4
28
Tension Torque
detected control output
+ -
-
Target
tension
Taper to use
/Taper not
to use
Minimum diameter
Maximum diameter
sion
P
SA
EAP