Red black laser

I bought a chinese red black laser 80 w,
I just installed a ma meter 0-30 ,
A bit disapointed when i test the meter ,

I tryed to set in Lightburn speed 20 and power too 60 ,
And the meter goes up too 25 , way too much when i only had power 60 .

Power 50 , up too 22 .

Have i only get a 60 w laser tube ?

Could i install the meter Wrong ?

Its not written anything on the tube , its all empty , not even the tubes brand .

Many of the manufacturers will actually provide a lesser “real” power tube and crank up the power supply (vastly shortening life) to make it act like a higher-powered laser. There should be a trim-pot (screw adjustment) accessible on the outside of the hight voltage supply somewhere to adjust. It would be a really good idea to turn off power when you adjust, or use a plastic screwdriver, to prevent shorting something inside the PSU or possibly zapping yourself.

Since the tube itself isn’t labeled, you have a generic tube that is almost certainly being over-powered to make it seem like a more powerful one. What is the diameter and length of the tube? That is a pretty reliable method to identify what the real power rating is.

The lenght of the whole tube is about 1200 mm long and 80 mm thick,

I dont really know what you mean to adjust the power supply .

I just thought i could run Lightburn at 80 % power too bee safe .

On 80 w i should bee around 22-25 on the meter ?

If the meter was installed wrong, you’d get no reading, no laser, and/or an attempt to show a negative reading.

If you have a 1,200x80mm tube, it “should” be 80W rated with max current of 28ma and long-life max current of 25ma or less. That’s best guess since you have an unlabeled tube.

You can control max power to the tube in 3 ways;

  • Figure out what laser output percent in Lightburn is equal to 25ma and don’t cut at anything higher than that.
  • Adjust the max-power in the Ruida controller (assuming it’s Ruida) so that 100% in Lighburn is no more than 25ma to the tube
  • Adjust the power-supply trim pot to be no more than 25ma with both the controller and Lighburn at 100%.

Doing the last one is harder and can be a bit scary, but it’s the best way. If you reduce the Lighburn or controller power there is less control between power levels.

Ok , if i set in Lightburn 55 % its going up too around 25 on the meter ,
So that Will bee my Max , and that would bee around 75 w ?

You probably are pretty close in your estimate but there can be variability for each machine based on tube and power supply quality so you are never going to know actual wattage output numbers until you get a laser power meter that can measure actual power output. FWIW, 55% on my 80 watt red and black tested to be right at 71.5 watts at 17.10 mA.

this seems like more of a hardware issue. Not a lightburn issue. Maybe contact the red black laser group? Can these guys help?

Folks, When asking for support for LightBurn via this forum, email or anywhere else, please keep the following tips in mind for the fastest and most helpful answers. Please provide these details: We need to know what machine you have, what controller it has, and what firmware it is running. Are you running the latest version of LightBurn? Is the issue new, or has it happened before? What kind of computer is it, and what Operating System is it running? Please note these things: Please speak…

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