Graco ProControl 1KS [38/138] Advanced setup screen 6

Graco ProControl 1KS [38/138] Advanced setup screen 6
Setup Mode
38 3A1080F
Advanced Setup Screen 6
This screen appears only if Flow Control is set to either
“On” or “On: Setup” in Configure Screen 5, page 30.
One-Point threshold
Flow Control runs in Pressure mode for flow setpoints
below this value. If the setpoint is at or above this value,
a linear calibration is made from (0, 0) to the point.
Learn Strength
This controls how much of the flow error signal is
applied when adjusting the Pressure-Flow curve. It will
always target the same flow. Because the flow control
drives to pressure, the reported flow rate may jump
around. However, if the material is consistent and the
pressure is constant, then the actual flow is correct.
Pressure zero offset
Zero-pressure calibration adjustment for pressure sen-
sor. Used primarily for accurate flow rate calculation in
Pressure mode. This is added to the pressure reading,
so a negative value zeroes out a positive offset.
Pressure intercept
Pressure-axis intercept of Pressure-Flow curve to match
the slope with the actual response.
Advanced Setup Screen 7
This screen appears only if Flow Control is set to “On” in
Configure Screen 5, page 30.
Command holdoff
Learn blanking time after setpoint command change.
Flow learning is turned off during this interval. May be
reduced for systems that have less than around x2 from
minimum to maximum pressure setpoints. May need to
be increased for systems with wide pressure swings.
Gun trigger holdoff
Learn blanking time after gun trigger is opened. Flow
learning is turned off during this interval. May be
reduced for high-pressure systems. May need to be
increased for low-pressure systems.
GT-Off drive time
Time to drive to pressure while the gun trigger is off.
GT-Off target rise
The additional pressure to control to based on flow rate
setpoint when the gun is closed. This allows the system
to be close to the pressure target when the gun is
opened.
Purge drive
Output drive during the Purge sequence. Maximum of
3300 mV.
Valve holdoff maximum
The maximum learn blanking time after dose valve
change. This is adjusted based on how much learning
was needed per dose changeover up to this maximum
value.
F
IG. 42. Advanced Setup Screen 6
FIG. 43. Advanced Setup Screen 7

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