Maiman Electronics SF8025, SF8075, SF8150, SF8300
16
Larger proportional gain result is larger changes in response to the error, and thus affects
the speed at which the controller can respond to changes in the system. While a high proportional
gain can cause a circuit to respond swiftly, too high a value can cause oscillations. Too low a value
and the circuit cannot efficiently respond to changes in the system.
Integral control helps compensate for steady-state error.
Low values of the integral regulator lead to quick compensation, but can cause oscillations.
Too large values lead to slow compensation. Zero value disables the integral regulator.
Derivative control attempts to reduce the overshoot and ringing potential from proportional
and integral control. Derivative control slows the response of the circuit. High gain values cause
the circuit to respond very slowly and can leave one susceptible to noise and high frequency
oscillation. Zero value disables the derivative regulator.
Before fine-tuning the controller learn the theoretical foundations of PID controllers.
20. Cooling
The board does not require active cooling. Aluminum mount is designed to remove heat
from the laser diode.
21. Internal protections
The device provides several security features to ensure the safety of the laser module.
The jumper shunts the outputs of driver, to protect the laser diode from static discharges
while installing.
Before installing the laser module on the board, make sure there is a jumper! Remove the
jumper before turning on the driver.
Reverse diode protects the laser diode from reverse current and reverse voltage.
In case of an over-current or an over temperature condition, the control logic disables the driver
and the output shorts with 2 mOhm shunt. Setting the current protection threshold is described in
paragraph 18. The current protection threshold must be less than the laser module absolute
maximum ratings.
The TEC current limit allows setting the maximum current safe for the Peltier module.
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