Be careful with the HVPS, under the right conditions it has lethal voltages!
What brand is your laser, is it a Redsail? Check on the back of your laser, there should be a tag stating who the manufacturer is. Once you know for sure what brand it is, contact your manufacturer for ideas and get the maximum working Ma of the tube . I have found Redsail to be fairly quick in responding to my inquiries. Other manufacturers, apparently, can be good or bad about getting back to you. For a Reci tube you can contact Reci directly for this info.
I have installed two different Reci power supplies in two different machines (a Redsail X700 and a Redsail M900, I have a second Redsail X700, but it has a 80 watt SPT laser tube). In both cases, there were no distinquishing marks showing it as a Reci HVPS. Instead I had to rely on my vendors to provide with the correct HVPS.
Have you done the following? 1. Place a multi-meter on Amp setting (or an Amp meter) in-line with the laser tube return line (this is the little wire near the laser exit lens). 2. Turn on the laser and set your laser controller output to 100%. While monitoring the return amperage on the multi-metier or the amp meter, run the laser tube for a few moments. Compare this reading with the recommended working current (amperage) for your tube. Reci recommends that a W4 tube (100W) should be no more than 26 to 28 Ma, with 26 Ma recommended. If you set you tube in this way, you will get the maximum life out of your tube. The tube set this way, should fire all the way to 100 %.on the controller. 3. If the output is to low or to high, there is an adjustment screw on your HVPS to either raise or lower you return current from your laser. Consult the documentation of your HVPS for the location and type of adjustment required.
If none of this helps, try the folks at
www.lightobject.com, they sell Reci laser tubes and HVPS's for repair and upgrade.
Final thought, if you have a Ruida controller (either a 320or a 6442), there is a vendor setting that allows you to set the max % at which the laser will fire. Most controllers are set at either 100% or 99%, but if yours is set at 75% for any reason, it would not fire above 75%.
Hope this helps and does not muddy the waters.
rinconchuck