Service manual

www.enc.net.cn/en Tel/Fax:[phone] Appendix 1 EDS1100 Drawing machine Inverter Manual
137
position of tension potentiometer should be changed to make the central point as
about 5.00V.This tension potentiometer should be the high-accuracy one with
360°.
2.1.4 Jog lead wire
The frequency of host jog lead wire and time of acceleration and deceleration
are independent from the ones at normal work. Jog frequency is multi-section
speed 2（F2.06）generally at about 6.0Hz. Jog acceleration and deceleration time
（F2.07 and F2.08）is generally about 10.0S.
2.1.5 Maximum frequency
As the frequency output of host is provision linear speed of retractable and
releasable wire, in order to ensure the liner relation between host frequency and
wire-retracting machine frequency, we have to equate the maximum frequency
between them. The high limit frequency of wire-retracting machine is just the
maximum frequency of itself.
Maximum working frequency of host is decided by the maximum liner speed of
drawing machine. Assuming we indicate the output frequency of host with highest
linear speed as F0 and ratio between full-diameter and empty-diameter of
wire-retracting machine as N=D1/D0 (N is generally 1.2~1.8). Mechanical
transmission ratio between wire-retracting machine and host is i (i is usually about
1).Then the following:
F
N
/F
F
=N
F
N
indicates output frequency of wire retracting machine empty- diameter
F
F
indicates output frequency of wire retracting machine full-diameter.
(F
N
+ F
F
)/2=i*F
0
F
N
=N/(N+1)*2*i*F
0
Maximum frequency of host and wire retracting machine is:
F
MAX
=MAX（F
N
，F
0
）
Suppose we set i=1，N=1.8，F
0
=70.0Hz,we can get F
N
=90.0Hz，F
F
=50.0Hz.
So the maximum frequency of host F
MAX
=90.0Hz, and the upper limit
frequency F
0
=70.0Hz.
And the maximum frequency of wire receiving machine F
MAX
=90.0Hz, and
The upper limit frequency F
MAX
=90.0Hz.
2.1.6 Smoothly start up for wire retracting machine
The wire retracting machine is generally in the machinery low limit position,
while not in zero position of tension sway bar. The PID adjustment makes a
certain amount provision input frequency for wire receiving machine when host
frequency is at 0Hz, which will cause impact when wire retracting machine starts
up if haven’t made any relevant disposal, as to fine-drawing machine and