1
2
rpm
Pump 1
rpm
Pump 2
Key-to-line
Key-to-line
bar
bar
Pressure build-up
function
Not
enabled
Setpoint for
pressure build-up
Line speed value for activating
pressure build-up
Activate pressure
build-up condition
Parameters for ALL pumps
Line speed
Actual
Operation
4-76
P/N 7105144G
2008 Nordson Corporation
VersaBlue_NW
Motor (contd.)
Screen 5: Pressure Build-up, Flow Control (contd.)
Variation 2: Line speed
Enable pressure build-up feature and select condition for which the
pressure build-up is to be started (here: Line speed).
The motors are speed-controlled during production. If the line speed signal
falls below the value Line speed value for activating pressure build-up, the
motors are pressure-controlled to the value Setpoint for pressure build-up.
As soon as the line speed signal exceeds the value plus 5% (15% in the
example), the melter returns to speed-controlled mode.
Fig. 4-108
Fig. 4-109
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