By adding a PWM output to a servo range of motion control systems an ideal low cost solution for precise duty and frequency controls has been made for system integrators of laser machines.

EE Controls has recently added a PWM output to its AMC-E servo range of motion control systems. Precise duty and frequency controls offer an ideal low cost solution to system integrators of laser machines. The PWM output is used to precisely control the modulation of the laser power to overcome problems of scorching caused by changes in machine speed.

The frequency range is 150Hz to 10MHz and the duty cycle has a resolution of 65535:1.

Both parameters can be set either from an HMI or host PC.

Minimum and maximum duty cycles can be defined to ensure the laser continues to modulate when contouring at slow speeds.

Inversely, the maximum duty cycle is used to limit laser power when cutting light materials.

The PWM output compliments the solutions provided for the laser system integrator when using one of the AMC range of motion control systems.

Other solutions include controlling the modulation via an analogue output and generating a trigger at a precise machine position to fire the laser.