Service manual

www.enc.net.cn/en Tel/Fax:[phone] Appendix 1 EDS1100 Drawing machine Inverter Manual
136
2.1 Working Theory
2.1.1 Working Theory
To ensure the drawing machine keep constant tension in the process of
receiving and releasing line and continue to line up line synchronously, especially
for Micro-pulling machine, we generally take frequency output voltage signal of
host as analog input voltage signal of wire retracting machine. The output
frequency of wire retracting machine should be reduced gradually so as to make
retracting and releasing wire in the same step with the increasing of wire
retracting machine volume diameter, and the output frequency of wire-retracting
machine is inversely proportional to volume diameter.
If we set the liner speed of retractable wire and releasable wire as V, and
following:
V=i*ω*R=2πF*R=π*i*F*D
F=i*V/π*D
F refers to output frequency of wire retracting machine,
i refers to machinery rotation ratio of retractable wire and releasable wire,
V refers to liner speed of host, which is proportional to the output frequency of
host.
F is inversely proportional to the volume diameter of wire-retracting drum
which indicated as D.
The output frequency of EDS1100 Series inverter is:
F=i*V/π*D+K2*U
PID
We define K1=i/π*D，which called coil coefficient.
D
0
means empty diameter of wire-retracting coil, when the coil diameter
restores, K1 there means empty path coefficients.K1 is F2.22 and K2 is F2.23.
2.1.2 Working requirements
(1) Jog lead wire must be independent
(2) Host operates with slow acceleration and deceleration
(3) Smoothly start up with continuous line
(4) Steady operation with small swing
(5) Synchronous machine stop without hitting limit down.
2.1.3 Feedback polarity detection
After EDS1100 inverter connects with tension balance bar voltage feedback as
diagram 1-1 shows, then move tension balance bar as it swings when
wire-retracting machine retracts wire. In the mean while, you should monitor PID
feedback voltage C.12 (to revise F3.28=12, so the panel monitor parameter is PID
feedback voltage), the value should change from low to high, generally change in
the range of 0.00V~10.00V or 2.00V~8.00V. If the value is not in this range, the