Amada UNIFLOW 4 REMOTE, Operation Manual, Page: 90 / 176

CHAPTER 4: OPERATING INSTRUCTIONS
UNIFLOW
®
4 PULSED HEAT CONTROL
4-8 990-908
The Control begins to ramp the temperature during the
RISE1
period at the ramp rate you set.
As soon as the temperature in
Rise1
reaches 140° C,
Rise1
will end and
Preheat
will start. The
Control will immediately control temperature to the
Preheat
temperature and there could be a
fast rise to
Preheat
temperature. The temperature increase may not follow the programmed
RISE1
ramp rate after the
Temperature
delta is reached.
Rise2
and
Reflow
will perform in a
similar manner.
As for the display on the
DATA
screen, if the time from the start of
Rise1
to 140° C is 1.7
seconds, then 1.7 seconds will display for the time of
Rise1
. The length of
Preheat
will be 3.0
seconds and the total time of
Rise1
+
Preheat
will be 4.7 seconds.
Functionality Example #2:
Time is selected for
Preheat and Reflow Control .
This is based on
the following Control settings:

Temperature
delta for preheat = 10° C

Rise1
time of 2.0 seconds

Preheat
time of 3 seconds

Preheat
temperature of 150°C
With these settings the Control ramps the temperature during the entire
RISE1
period at the ramp
rate you set, and it switches control to the
Preheat
temperature at the end of the full
RISE1
time.
As for the display on the
DATA
screen, if the time from the start of
Rise1
to 140° C is 1.7
seconds, then 1.7 seconds will display for the time of
Rise1
. The length of
Preheat
will be 3.3
seconds, so the total time of
Rise1
+
Preheat
will be 5 seconds.
If you select
Temperature
for the Preheat and Reflow Control, and set
Rise1
and
Rise2
to zero
seconds, the Control will behave as shown below. (If you set
Rise1
or
Rise2
to zero, the
DATA
screen will display zero seconds for these periods.)
Functionality Example #3: Temperature is selected for
Preheat and Reflow Control .
This is
based on the following Control settings:

Temperature
delta for preheat = 10° C

Rise1
time of 0.0 seconds

Preheat
time of 1 seconds

Preheat
temperature of 150°C

Rise2
time of 0.0 seconds

Reflow
time of 1 seconds

Reflow
temperature of 300°C
The Control will perform as shown in the following diagram. The slope of the temperature
increase will be based on the
Coarse
and
Fine
Heating Rates as well as the
PID Control
settings.
The times reported on the
DATA
screen will be as follows:

Rise1
time of 0.0 seconds

Preheat
time of 1.2 seconds

Rise2
time of 0.0 seconds

Reflow
time of 1.3 seconds