Air-Vac DRS27, User Manual

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DRS27 User’s Guide Chapter 4: Software Overview
0025.00.902 4-29
Process Heating
Z-Axis Hot Gas - Heater
Function: Turns on or off the upper heater.
Action: The air flow (flow control) and temperature are selected. The upper heater is activated.
Task Properties:
Flow Control (%): Controls the air/nitrogen flow from the mass flow controller to the upper heater
(20-100%). The settings generally correspond to the nozzle size. Recommended flows:
Nozzle Size (mm)
Heater Flow (%)
Less than 10* 30 *For MNX nozzles set the flow to 60%
10-15 40
16-26 50
27-30 55
31-34 65
35-40 75
40+ 85
Use Heater By-Pass Control: Indicates by-pass system is activated. Ambient air flows through the
nozzle by passing the heating element. Generally, used to cool component, package and joints in the
replacement program after peak reflow temperature is reached. This minimizes/controls the time from
reflow 1 (peak temperature) to end of reflow 2 (just below melting temperature).
Temperature (º C): Sets the upper heater temperature.
Wait For Heater In-Position: Indicates wait for heater in-position function is activated. A separate
thermocouple in the heater can be used to insure the temperature programmed is reached prior to a
process.
In-Position Delay (sec): Used in conjunction with wait for heater in-position. Indicates the time after
the temperature is reached prior to a process.
Use Heater Ramp : Indicates use heater ramp function is activated.