Graco 312776F Manual De Usuario
System Operation
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312776F
System Operation
Operation Modes
Mix
System mixes and dispenses material.
Standby
Stops the system.
Purge
Purges the system, using air and solvent.
Sequential Dosing
Components A and B dispense sequentially in the nec-
essary volumes to attain the mix ratio.
essary volumes to attain the mix ratio.
Dynamic Dosing
In typical operation (ratios 1:1 and above), component A
dispenses constantly. Component B dispenses intermit-
tently in the necessary volume to attain the mix ratio.
dispenses constantly. Component B dispenses intermit-
tently in the necessary volume to attain the mix ratio.
Recipe (Color) Change
The process when the system automatically flushes out
the old color and loads a new color.
the old color and loads a new color.
Solvent Push
The Solvent Push feature enables the user to save
some mixed material by pushing it out to the gun with
solvent. The feature requires an accessory solvent
meter. See page 63 for complete information.
some mixed material by pushing it out to the gun with
solvent. The feature requires an accessory solvent
meter. See page 63 for complete information.
Mix Fill Push
The Mix Fill Push feature enables the user to prevent
potlife expiration of material by mixing and flowing new
material through the Gun Flush Box. See page 64 for
complete information.
potlife expiration of material by mixing and flowing new
material through the Gun Flush Box. See page 64 for
complete information.
General Operating Cycle,
Sequential Dosing
Sequential Dosing
1. The spray gun operator enters and loads the
desired recipe. The color change LED blinks while
recipe is loading, then turns solid when complete.
recipe is loading, then turns solid when complete.
2. The operator presses the Mix
key to begin
operation.
3. The ProMix 2KS controller sends signals to activate
the solenoid valves. The solenoid valves activate
Dose Valves A and B. Fluid flow begins when the
gun is triggered.
Dose Valves A and B. Fluid flow begins when the
gun is triggered.
4. Components A and B are introduced into the fluid
integrator (FI) one at a time as follows.
a. Dose Valve A (DVA) opens, and fluid flows into
the integrator.
b. Flow Meter A (MA) monitors the fluid volume
dispensed and sends electrical pulses to the
ProMix 2KS controller. The controller monitors
these pulses and signals.
ProMix 2KS controller. The controller monitors
these pulses and signals.
c. When the target volume dispenses, Dose Valve
A closes.
NOTE: The dispense volume of component A and B
is based on the mix ratio and dose size set by the
user and calculated by the ProMix 2KS controller.
is based on the mix ratio and dose size set by the
user and calculated by the ProMix 2KS controller.
d. Dose Valve B (DVB) opens, and fluid flows into
the integrator and is aligned proportionately with
component A.
component A.
e. Flow Meter B (MB) monitors the fluid volume
dispensed and sends electrical pulses to the
ProMix 2KS controller.
ProMix 2KS controller.
f.
When the target volume is dispensed, Dose
Valve B closes.
Valve B closes.