Pneumatic Servo Engineering Whitepaper

High-Pressure Proportional Valve Response & Corner Anti-Burn Pressure Modulation

When high-power fiber lasers decelerate into acute corners (<90°), excessive heat builds up in the localized melt pool. If assist gas pressure cannot be stepped down within milliseconds, violent uncontrolled oxidation results in severe corner overburn and rounded melt edges. ACTCNC ultra-fast proportional servo valves achieve a 0–25 Bar step response in under 15ms, synchronizing gas pressure with CNC motion acceleration in real time.

1. Conventional Solenoid Valves vs. ACTCNC Ultra-Fast Proportional Servo Valves

Pneumatic Control System	Pressure Step Response Time	Pressure Regulation Resolution	Corner Quality on 20mm Carbon Steel
ACTCNC Fast Proportional Servo Valve	< 15 Milliseconds (≤15ms)	±0.05 Bar (Closed-Loop Sensor)	Crisp Sharp Corner (Zero Melting Overburn)
Standard Industrial Proportional Valve	120 – 250 Milliseconds	±0.30 Bar	Slight corner rounding & slag bead
Digital High/Low Solenoid Valve	>400 Milliseconds (Lagging)	Fixed binary pressure only	Severe thermal burnout / corner blowout

2. Dynamic Power-Pressure-Frequency Curve Coupling

By coupling CNC travel speed with laser peak pulse duty cycle and proportional valve pressure, ACTCNC intelligent corner algorithms ensure consistent heat input per unit length regardless of path geometry.