Hydraulics; Lift Table Moves Too Slowly; Lift Table Will Not Move; No Hydraulic Pressure - Dukane VWA-4300 User Manual

Linear Vibration Welder 4000 Series, Model VWA User's Manual

Hydraulics

Lift Table Moves Too Slowly

1. Check that the weld pressure is not set too low. It
must be greater than the table weight, lower tooling
weight and static table friction load.
2. Check that the hold pressure is not set too low.
3. Check that the table lift force is not set too low.

Lift Table Will Not Move

1. Check that the hydraulic pump is turned on.
The HYDRAULIC PUMP ON light will be lit green
and you should be reading Pressure Feedback.
2. If the hydraulic pump will not turn on, check that the
hydraulic breaker is not tripped. See Figure 10 - 7 for
the breaker location.
3
. Is the hydraulic pump motor rotating in the wrong
direction? If the Pressure Feedback reading indi-
cates almost zero psi when the pump is on, check that
your 480 Volt AC, 3-Phase line is correctly wired. If
any of the phases leads are switched, the pump motor
will rotate backwards.
The welder has built-in diagnostics, and the Alarm
screen will display an error message indicating No
05/01/2012 01 : 55:47 PM
Alarm Screen - No Hydraulic Pressure
Figure 10 - 9
Page 126

NO HYDRAULIC PRESSURE

Hydraulic pump is on but no pressure is detected.
Pressure Feedback Reading
Figure 10-8
Dukane Manual Part No. 403-592-00
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