Carlisle Ransburg DynaFlow 77376, Руководство по обслуживанию, Страница: 32 / 96

- Master Channel
This parameter has eight possible settings: 1-8.
For single channel guns, it simply indicates which channel
will be controlling the flow control valve and reading the
flowmeter for this applicator.
For dual-channel guns, this indicates (normally) which chan-
nel will be controlling the resin part of the mixed material.
It is always desirable for the master channel to have the
higher flow rate of the two materials.
- Slave Channel
This parameter has four possible values: 2, 4, 6, or 8.
It indicates which channel will be the slave (typically the
catalyst) to the master channel (selected above) for ratio
control.
- Clean Channels
This parameter has four possible values: NONE, MASTER,
SLAVE, or BOTH.
This setting determines which of the fluid regulators (or
MVR valves) are opened to full when the unit is put in
'Clean Mode' for flushing and filling operations.
Default JOB#
Sets the JOB# which is loaded at power ON.
Flow Tolerance Percentage
This is a number (in percent) that indicates how much
deviation above and below the set point is acceptable.
Increasing this number will reduce nuisance faults, but may
lead to inaccurate fluid metering if set too high.
This number is a percent of the specified mix ratio for
each of the 2 materials that is allowed to occur before the
system faults with an OUT OF TOLERANCE fault. This is
only updated after the volume of material, as set by the
Tolerance Volume, has passed through the GUN. The ac-
cumulated flow volume is reset to 0 upon the application
of each RUN command.
Tolerance Volume
This parameter has no effect on single-component GUNs
and only effects GUNs configured for two-component
operation.
This is the volume over which the ratio accuracy is checked.
Every time the volume of Master CHANNEL fluid specified
in this parameter has flowed, the ratio is checked. The
default value is 150 cc’s of the Master CHANNEL. This
parameter should never be set so low that less than 10
cc’s of the slave channel has flowed. If this value is set
too low, nuisance OUT OF TOLERANCE faults will occur.
The first time a gun is triggered after being placed in Run
mode, the Tolerance Volume is 150% of the value entered
in the job.
Mixed Volume
The amount of mixed material present in the mix tube, fluid
lines, and spray GUN combined. The fluid in the spray GUN
is always the material that has been mixed the longest. The
processor keeps track of how long this material has been
mixed (Pot-Life Timer), and therefore needs to know the
volume from the mix tube to the spray GUN. To determine
the amount of mixed material in the system:
1. Measure the volume of the mixing block.
2. Measure the volume of the spray GUN.
3. Measure total hose length and inside diameter.
4. Use the following formula to calculate hose volume.
5. Add 10% to calculated value.
Volume = d
2
x L x 12.87
Volume = Volume in cc’s
d = Inside diameter of hose
L = Length of the fluid line from the flow
meter to the spray GUN in inches
It is best to over-estimate the amount of mixed material
rather than to under-estimate it!
The DynaFlow system uses the Mixed Volume and the
Pot-Life Time when it monitors the flow rate of the Gun.
Pot-Life is monitored by dividing the Mixed Volume into
40 equal sized 'buckets' of material. When an amount of
material has flowed that equals the 'bucket' volume, the 40
'buckets' are time-shifted so the oldest 'bucket' is eliminated,
representing the material that has vacated the Mixed Volume
tubing at the GUN, and a new 'bucket' is added. If the GUN
is in either Run or Load mode, a time value of 1 second is
placed in the new 'bucket' to represent mixed material. If
the GUN is in Clean mode, a time value of zero is placed
in the new 'bucket' representing solvent. Every second,
the time values stored in the 'buckets' are incremented if
they are non-zero (i.e. contain mixed material vs. solvent).
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