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5.2 Pendant Operation (see Figure 7)
Oil flow and motor operation are controlled by the pendant
buttons. The pump will run and the cylinder will clamp when the
pendant Up-Arrow button is pressed. The pump will run and the
cylinder will unclamp when the pendant Down-Arrow button is
pressed. Releasing either button at any time will stop the pump
and will relieve pressure in the hoses (see Fig. 7).
1.
Up Arrow = Motor On - Momentary Clamp
2.
Down Arrow = Motor On - Momentary Unclamp
3.
On/Off = Not Used (disabled)
Shroud On/Off = Not Used (disabled)
Up Arrow
®
Down Arrow
ON / OFF
(disabled - not functional)
5.3 Foot Switch Option
(see Figure 8)
1.
Motor On - Momentary Clamp
2.
Motor On - Momentary Unclamp
Shroud On/Off = Not Used
(disabled)
5.4 Automatic Dwell Mode Operation (Models
equipped with optional pressure transducer)
The Dwell Mode feature allows the pump to react automatically
at two user-defined pressure values, "PRESR A" and "PRESR
B". This feature can be turned on and off as desired. See the
following paragraphs for additional information. Also refer to
Section 6.5 for detailed Dwell Mode operation and setting
instructions.
1. Dwell Mode Off
The pump LCD Panel will display pressure as a simple pressure
gauge, no additional actions will be performed regardless of
PRESR A and PRESR B values.
2. Dwell Mode On
The pump will automatically de-energize the motor and valve
solenoid after the specified PRESR A or PRESR B value is
reached AND the specified dwell time (in seconds) has elapsed.
When the pump stops, pressure in hoses will drop to zero (0) so
that couplers can be disconnected from the pallet.
NOTE: "AUTO" is shown on the LCD screen when Dwell Mode is
turned-on. "OK" is shown when Dwell Mode is turned-off.
5.4.1 Overview of Dwell Mode
Before the PRESR A or PRESR B value is reached:
• Pendant Up-Arrow and Down-Arrow buttons will function
as described in Section 5.2.
Figure 7
Figure 8
After the PRESR A or PRESR B value is reached:
• Continuing to press and hold the Up or Down Arrow
button after the specified pressure value is reached will
activate the dwell timer. The LCD screen backlight will
begin flashing, and the pump will continue running until
the user-defined dwell time (1 to 60 seconds) has elapsed.
• To ensure proper clamping and unclamping, the Up or
Down Arrow button must remain depressed until the
pump stops.
• Releasing the Up or Down Arrow button will stop the
automatic cycle, and the LCD screen backlight will stop
flashing.
• If dwell time is set to zero (0), the pump will stop
immediately when the specified pressure value (PRESR A
or PRESR B) is reached.
3Restarting the Automatic Cycle:
Releasing and depressing the pendant Up-Arrow or Down-
Arrow button will restart the automatic cycle.
Warning: Set pump to "DWELL OFF" and disconnect
electrical power to pump before working on pump or
hydraulic system.
Caution: Due to motor coast down, valve shift time, and
system oil capacitance, always set the user-adjustable
relief valve 200 psi above the PRESR A or PRESR B
value to prevent pressure spikes.
5.5 Relief Valve Adjustment
The pump is equipped with a user-adjustable relief valve. Adjust
pressure as follows:
1.
Set the pump to DWELL OFF. Refer to Section 6.5A for
instructions.
2.
Install a 0-6,000 psi [0-400 bar] gauge in the "A" port (see
figure 9). Place a 3/8" pipe plug in the "B" port and torque to
25 ft-lbs [33 Nm].
3.
Loosen the relief valve locknut to permit adjustment of set
screw.
4.
Press and hold the Up-Arrow button on the pendant. (see
figure 7). Allow pressure to build.
5.
To increase pressure: SLOWLY turn the relief valve set screw
clockwise until pressure increases to the desired setting.
6.
To decrease pressure:
a. Turn the relief valve set screw counter-clockwise one turn.
b. Press and hold the Up-Arrow button on the pendant.
(see figure 7). Allow pressure to build.
c. SLOWLY turn the relief valve set screw clockwise until
pressure increases to the desired setting.
7.
When the desired pressure setting is reached, lock the set
screw with the locknut. DO NOT overtighten.
8.
Release the Up-Arrow button. Check that gauge indicates
zero (0) psi.
B
Port "B"
5
Relief valve body
(DO NOT TURN)
A
Port "A"
Locknut
Set screw
Figure 9
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