Q: What laser tubes is this power supply compatible with?

A: The Cloudray M100W supports CO2 glass laser tubes rated 40W to 130W within the 700-1250mm length range. It auto-matches impedance to the tube load, making it a drop-in replacement for most Chinese-manufactured CO2 laser engravers and cutters (K40, 50W, 60W, 80W, 100W platforms). The PWM input accepts standard 0-5V TTL signals from popular controllers including Ruida, TopWisdom, and Arduino-based GRBL setups.

Q: How do I wire the water-flow interlock?

A: The power supply includes a dedicated water protection (WP) terminal block. Connect your water flow sensor's normally-open signal wire to the WP terminal and ground. If water flow drops below the sensor threshold (typically <2L/min), the PSU cuts laser output instantly — critical for preventing tube overheating and catastrophic failure during unattended engraving runs.

Q: What is the expected lifespan of this power supply?

A: Under normal operating conditions (ambient temperature <40°C, dust-free environment, load within rated range), the Cloudray M100W delivers 3-5 years of continuous service. The main longevity factors are: (1) keeping the cooling fan intake clean to prevent thermal stress on the flyback transformer, (2) avoiding sustained operation at >95% rated current, and (3) ensuring the laser tube itself is not aged/deteriorated (a dying tube draws erratic current that stresses the PSU).

Q: Can I use this with a 220V-only workshop supply?

A: Yes. The input stage auto-detects 110V or 220V AC — no manual voltage selector switch required. The power supply will work anywhere from 90V to 240V AC. For 220V environments, current draw is approximately half of the 110V equivalent, which reduces heat buildup and extends component life. Always install a dedicated 10A circuit breaker on the laser PSU line.

Q: Does it work with Ruida and DSP controllers?

A: Yes. The 3-pin TTL/PWM interface (TH, TL, G) is the industry standard pinout used by Ruida RDC644X series, TopWisdom TL-series, and generic DSP controllers. Connect TH to your controller's PWM+ output, TL to PWM- or GND, and G to signal ground. The test-fire button on the PSU chassis lets you verify tube firing before connecting the controller — useful during initial setup and troubleshooting.

Q: What safety precautions should I take during installation?

A: Always discharge the high-voltage capacitor before handling the PSU (wait 5 minutes after power-off). Mount the PSU vertically with the fan facing open air — do not enclose it in an unventilated compartment. Use silicone-insulated high-voltage wire for the tube anode connection (rated >30kV). Never bypass the water-flow interlock. Install an emergency stop that cuts mains power to the entire laser system, including the PSU. The laser tube emits invisible infrared radiation — always operate behind laser-safe acrylic shielding.