How to Convert 220V to 110V on a Chinese CO2 Laser Power Supply

This instructable provides a step-by-step approach to changing a Chinese CO2 laser power supply from an input voltage of 220V AC to 110V AC. I perform this operation regularly as my customers change their requirements, or they are simply located in the US and are running their laser machine off a 110V AC line. Sometimes, I have purchased the 220V AC power supplies inadvertently, then needed to change them over.

For this instructable, a RECI Laser power supply, identified by its label as a DY10 is used.

However, at the final step of this instructable is the common black colored laser power supply is shown, with its jumper wire connection needed to convert it to 110V from 220V AC.

Wiring 110VAC Input Lines Permits Either L or N to Be Placed on Either of the Labeled AC Input Lines.

After the conversion is completed, the AC line can be wired in per the AC labeling. The Line and Neutral for the AC wiring can go to either "AC" label.

Control Lines for CO2 Laser Power Supplies Come in Only 2 Forms, As Shown.

I fabricated this cross-over connector to simplify the process of changing from one power supply vendor to another. It becomes necessary to use this if the previous laser power supply had the other style of configuration. Of course, I could directly wire it myself, but from years of experience, problems can be introduced, such as loose connections, mistakes in determining wire colors, etc. So, just plug and go with this connector.

Begin by Removing the Two Screws From the Side of the Metal Enclosure As Shown.

Remove the Underside Screws to Complete the Removal for This Metal Portion.

Unscrew High Voltage and Return Wire Connectors and Give Some Slack

See the PCB Panel (green Board) and Remove It From the Base Metal Enclosure

Unplug the Fan Connector to Alleviate or Prevent Straining the Wires to the Fan.

For the potentiometer. After finishing this instructable, then use a meter to read the amps (See other instructable on this one) and adjust. Use a laser power meter, like the lower cost Mahoney CO2 power probe, to get the laser power after adjusting--do not exceed the tube rating or the tube will not last very long.

See the Two Longer Screws That Attach to the Heat Sinks Below the PCB

Do Not Move or Relocate the Heat Sinks

Flip the PCB Over to Expose the Bottom, Where You Will Add the Jumper Wire.

Helpful Tools for the Process.

Make Sure to Use a Good Size Wire to Handle the AC Input Per the Amps Required.

Eye Up the Length.

Confirm the Length. Do Not Make the Wire Too Long.

Always Confirm Measurements and Take Time to Perform the Job Properly.

Jumper Preparation Includes Tinning the Jumper Wire.

Use Sufficient Heat to Ensure a Good Bond. Tug on It!

Put It Back Together

Label the CO2 Laser Power Supply for 110V AC.

Another Common Style of CO2 Laser Power Supply 220V to 110V AC Conversion

This 60 watt CO2 laser power supply is another common one that can be converted, per the jumper marking shown for its PCB. I use the fabricated cross-over connector for my customers that have the other style so that they can plug in using their same AC connector.