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Pressure and flow control system SYDFE1 series 2X, 3X
| Commissioning
Bosch Rexroth AG, Edition 10.2021, RE 30011-B
8.1.11 Checking swivel angle sensing
▶ The directional valve(s) must be closed
▶ Provide a swivel angle command value of ≥5 V
▶ Feed forward pressure command value 20 bar
(Following the example on page 68 (31.7 mV/bar), apply a pressure
command value of 0.634 V)
The resulting pressure must be 20 bar (±3 bar)
▶ Check, whether a voltage of 0 V ±0.1 V can be measured at test jack 4
▶ Correct any deviations by means of potentiometer R8 (front panel)
The maximum swivel angle of the pump can be adjusted in two different ways.
Adjustment while the system is running:
1.
Apply a swivel angle command value >10 V, pressure command value 5 V
2.
Direct the full flow via the consumer or flowmeter: e.g. activate hydraulic motor
or set pressure relief valve to ca. 20 bar
3.
Adjust potentiometer R9 so that a voltage of +10.0 +0.01 V can be measured at
test jack 4.
Adjustment while the drive motor is switched off:
1.
Switch the hydraulic system off and wait for ca. 5 min until the pump has
swiveled out mechanically (wait until pressure reduction is completed). You
can also observe the actual swivel angle value (test jack 4) and wait until the
actual swivel angle increases to a value below the maximum value and then
remains constant.
2.
Measure the actual swivel angle value and set it to +10 V +0.01 V (corresponds
to maximum stroke) by means of potentiometer R9.
3.
In some cases, the pump will not swivel to the limit stop (maximum value).
For this reason, briefly switch the motor on, then switch off again, wait until
the pump has swiveled out and then measure the actual swivel angle value. If
a higher voltage is measured, correct the value. Repeat this procedure several
times.
8.1.12 Adjusting the power limitation (with VT-5041-3-3X/... only)
By means of power limitation you can determine the maximum power consumption
of the pump in order not to overload the drive motor.
The calculated power limit can be adjusted by means of potentiometer R3 (front
panel) and measured directly at test jack 8 (front panel). The value range of
0…+10 V corresponds to a calculated power of 0…+100 %. The adjustment at the
test jacks can also be made while the hydraulics is switched off. Switching output
18a or the LED lamp on the front panel becomes High, when the actual swivel
angle value (flow) and the actual pressure value are sufficiently high so that the
power limitation responds. When the hydraulics is switched off or shut off,
switching output 18a is not active.
Factory setting for R3: 10 V = 100 % (right-hand positive stop)
▶ Check that jumper J2 is set in position 2-3
▶ Turn potentiometer R3 (front panel) to the left-hand positive stop (factory
setting is right-hand positive stop ≙ +100 % power limit)
Check swivel angle
“zero"
Setting swivel angle
“100 %”
Set constant power
limitation by means of
potentiometer R3
External input of
performance limit
