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General Description
The PP600 current controller provides repeatable intensity control of LED
lighting for machine vision applications. It includes the power supply, intensity
control, timing and triggering functions required for machine vision systems.
LED lighting needs a constant current supply as small variations in voltage can
cause large variations in light output. Currents can be specified in 0.25mA
steps below 1A and in 1mA steps above 1A.
Three modes of operation are provided separately for each channel:
Continuous:
In continuous mode the output is a continuous current.
Selected Continuous:
In selected continuous mode one or both inputs can be used to select an
output current. For each state of the inputs, the output current is fixed.
Strobed:
In this mode output is pulsed once per trigger. One input is used as a
trigger. The delay can range from 8us to 9.9ms in 1us steps. The pulse
width can range from 1us to 9.9ms in 1us steps.
The PP600 is set up using four push buttons and a four digit seven-segment
display.
Configurations are saved in non-volatile memory so that the PP600 will resume
operation after a power cycle.
