Engineering sizing matrix, striking voltage tolerances, flyback transformer failure isolation, and 6-pin terminal pinouts for Cloudray, Reci, and K40 laser engraver power units.
Select the matching high-voltage power supply based on your tube wattage, striking voltage (kV), and continuous current ceiling.
| Model / Part # | Brand | Compatible Tube | Striking Voltage (kV) | Max Operating Current | Control Input | Replacement Action |
|---|---|---|---|---|---|---|
| Cloudray MYJG-40W | Cloudray | 40W (700mm × 50mm) | 16 kV DC | 16 mA Continuous | 0–5V Analog / PWM | Check Current Price & Prime |
| Cloudray MYJG-50W | Cloudray | 45W – 50W (800mm) | 19 kV DC | 18 mA Continuous | 0–5V Analog / PWM | Check Current Price & Prime |
| Reci DY13 Commercial | Beijing Reci | 80W – 100W (Reci W2 / W4) | 24 kV – 28 kV DC | 28 mA Continuous | Active High / Low TTL | Check Current Price & Prime |
| Replacement Flyback Coil | Generic OEM | 40W – 60W MYJG Coils | 16 kV – 22 kV DC | Board Solder Component | PCB Dual-Pin Mount | Check Current Price & Prime |
When your CO2 laser refuses to fire, 50% of technicians replace the wrong part. Follow this sequential isolation protocol before buying equipment.
A stuck flow switch or bubble in the chiller sensor leaves the WP circuit open. Bridge the WP and G terminals with an insulated wire. If the power supply now fires, replace the flow sensor, not the power supply.
Depress the red TEST button directly on the power supply chassis. If the tube strikes and the analog ammeter deflects, your high-voltage circuitry is 100% healthy. The fault is in the DSP controller or USB cable.
If depressing TEST generates a sharp snapping sound, clicking, or pungent ozone smell with 0mA ammeter needle movement, the epoxy potting in the flyback has cracked and is arcing to ground.
The #1 cause of laser power supply failure is running the laser tube with a disconnected or high-resistance ground cathode wire. Without a low-resistance path back to the power supply, the 20,000V striking pulse arcs internally across the flyback transformer secondary windings, blowing the MOSFET switching transistors.
The 6-pin connector links the power supply to your machine controller: 'L' (active-low laser enable), 'P' or 'WP' (water protection interlock), 'G' (signal ground), 'IN' (0–5V analog or PWM power control), and '5V' (reference output for manual potentiometers).
Yes. Standard 12V or 120V electrical wire cannot contain 20kV+ DC. You must use specialized high-voltage silicone wire rated for 30kV–40kV DC, and seal all spliced connections with silicone rubber sealant (such as Dow Corning 704) covered by high-voltage silicone insulating boots.