ZF-DUOPLAN 2K120, Руководство по эксплуатации

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Operating Instructions
Initial Installation 2K120/2K121
20
Gearbox shift mechanism:
Gearchanges are effected when the 24 V voltage
is applied to pin 2 and 3. The polarity of the
applied 24 V DC voltage dictates which gear is
engaged.
In 1st gear => Pin 2: + / Pin 3: ‒
In 2nd and 3rd gear => Pin 2: ‒ / Pin 3: +
During the gearchange, the main spindle motor
should make the shaft oscillate ±5° at a rate of 1
to 5 rotation direction changes per second. Major
pendulum motion may lead to damage at the
meshing gears.
In average, this means: n
Mot
= 5°/s = 5° 60/min =
300°/min = 300/360 rpm = 0.83 rpm.
Conversion
Pendulum speed
↔ pendulum rotary motion
Speed
[rpm] Angle
[°/min] Time
[sec] Angle
[°/sec]
0.25 90 3.33 5
0.50 180 1.67 5
1.00 360 0.83 5
2.00 720 0.42 5
3.00 1080 0.28 5
4.00 1440 0.21 5
5.00 1800 0.17 5
The machine optimum is to be determined on the
basis of shift tests in relation to the different
masses and thereto connected drag torques of the
spindle.
The limit switch signals from S1 (contact 4) and
S2 (contact 6) serve to shut off the shift unit once
the gearchange is complete.
CAUTION
After the limit switch signals have been reached,
the shift unit is allowed to be live for a maximum of
0.5 second. The limit switch signals must be
monitored during the operating time.
The limit switches must only be energized with the
control current (0.1 – 0.5 A) and not with the
changeover current (5 A).
If the number of resistors is rather small, also a
lower control current can be used.
The control current for end-position monitoring is to
be set according to length, line and transition
resistance and the number of connection points.
Increased resistance due to corrosion after some
time must be taken into consideration. Switching of
inductive loads by means of the control current
requires it to be wired parallel to the load by a
diode.
If the limit switches detect that a gear is no longer
securely engaged, steps such as emergency shut-
off etc. must be initiated through the control
system.
NOTE
Electromagnetic fields can falsify the limit position
monitoring currents. This can be prevented by re-
routing or shielding the line.
The shift sequence must be monitored. If
necessary, a timer should be used to cancel the
shift sequence after approx. 2 seconds if there is
no limit switch signal (S1/S2). The main spindle
motor can not be operated until this signal is
present.
Rotation direction
changes