Advertisement
Wire drawing machine
Dancer feedback
speed control
Wire drawing section
Actual line speed
Motor speed
The wire drawing section pulls the wire at a constant speed to
make the wire thinner. For the winding shaft, the inverter pro-
vides dancer feedback speed control to keep the dancer roll
position, achieving constant tension winding.
In addition, using the winding diameter calculation function,
the circumferential speed of the winding reel is kept constant.
Some systems require peripheral devices such as regenerative options.
Relevant functions
Dancer feedback
speed control
The unwinding shaft rotation speed is
controlled to keep the dancer roll
position constant. The wire tension is
kept constant.
The control function is useful for winding in the wire drawing machine. High-
speed winding is offered for high-inertia loads.
Reference shaft
Dancer roll position
Line speed command
Winding diameter
calculation function
The circumferential speed of the winding
shaft is kept constant by calculating the
winding diameter of the winding shaft. Hunt-
ing can be reduced in dancer roll control.
Speed control proportional
gain compensation
By adjusting the speed control proportional
gain according to the winding diameter, the
response level can be kept constant.
Inverter
FR-A800-R2R
(with the FR-A8AP*
installed)
1
Inverter
FR-A800-R2R
(with the FR-A8AP*
and FR-A8AZ*
installed)
1
2
The products in the parentheses
*1 Used for vector control.
are plug-in options.
*2 Used for the line speed output.
Initial winding
diameter calculation
The present winding diameter is calcu-
lated based on the dancer roll move-
ment at a start from the lower limit
position to the target position.
Tension PI gain tuning
By automatically adjusting the tension
PI gain, time required for adjustment is
significantly cut down. Anyone can
start the system easily.
Features
Winding shaft
Encoder-equipped motor
SF-PR-SC
Dancer roll
Speed detector
1
11
Advertisement
