SHENZHEN ENCOM ELECTRIC TECHNOLOGIES CO. EDS1000 series Service Manual page 3

Print version:V3.0-A11
rewinding of the inverter, to keep constant tension of winding and
rewinding cable.
Drawing machine can divide into large drawing machine, medium
drawing machine, slender drawing machine and micro drawing
machine other four, composes of drawing and taking-up two parts. To
improve the quality of cable and lower the cost, drawing machine is
general from single frequency control to dual-frequency control, and
now most of the dual-frequency control is generally used external PID
control board, the shortcomings of this approach are: the control
parameters of PID board is difficult to debug, the control performance
depends on the level of debugging skill; Too many components and
adjustable potentiometers on the PID board are more prone to damage,
repair and maintenance costs are high.
EDS1100 series inverters specialized in drawing machine adopt a
unique control method, independently form dual-frequency digital
PID control system, automatically identify the diameter of reel roll,
the mechanical transmission ratio, cable diameter, automatically adjust
the PID parameters, track the speed of the host, that is to pole zero of
the tension balance when it powers on (middle point), is a real sense
of the fool-type inverter special for drawing machine. As long as the
correct general electrical wiring, you can work. Whether it is an empty
plate, half plate, full plate, or the low speed, medium speed, high
speed, which ensures a smooth start, smooth operation, constant
tension when wire drawing machine at work, as well as achieving start,
stop at any time. Complete replacement of external PID board to make
the system more compact, cheaper, easier to maintain, while
controlling effect is more stable.
In order to maintain constant tension of the close and put, the
inverter special for drawing machine is to be in a relatively short
period of time acceleration and deceleration. During the process of
acceleration and deceleration, the inverter must provide larger start-up