I’m new to CNC and am trying to get my LaserBeam from Sienci Labs working, but I can’t see anything on the wood (plywood 3.6 mm). I have watched several videos, controlled the laser via gSender, controlled the laser via LightBurn, but unfortunately. Tested various settings, again unfortunately. It appears that the LongMill is moving too quickly along the X-axis. Additionally, when I start the laser the Z axis always goes up, so it doesn’t stay at the set height. Is there anyone who can and wants to help me?
The second question concerns the standard lens. Should there be such a drop on the lens?
What program did you design and produce the G-code with? If you designed in LightBurn there shouldn’t be any Z moves. On the other hand if you designed in Vectric or similar software aimed at routers you need a special post processor that eliminates Z moves. JTech has a post processor for Vectric to make laser G-code.
If you don’t use Vectric, or don’t want to mess with post processors, I would recommend exporting your design as an SVG and then importing that SVG into LightBurn and let LightBurn make the G-code and control the laser. It’s probably better to use LightBurn in any case because you can set a Z drop per pass when cutting so that the laser focuses deeper into the cut on each pass.
There shouldn’t be such a ‘drop’ in the lens and I’ve seen this before. Check out this thread.
If you have the design in LightBurn and use LB to control the laser it might be a problem with the coordinates and job origin. I always use the Current Position option. It is in the place where you hit start to run the laser. I never figured out how to use User Origin and Absolute Coordinates is not the way to go on a LongMill because you would have to have the stock in exactly the right place.
With Start From = Current Position you just put the laser where you want it to start from and that spot is equal to the little green square that represents the origin of the design in LB.
@GeorgeV In addition to the help you are getting from others, I would add that, if you are using LB to control the laser, make sure to set $30 and $32 in the console of LB. $30 must be the same value as your S-max.
Looking at your pic, it seems to me that you have a lens issue. You should open a support ticket and include that pic.
@GeorgeV I’m not any where near an expert in LB, so I was confused by the “material” setting in your layers window as I don’t have that setting in my layers window. Doing some research, I found that setting is triggered by the “enable Z axis” in Device Settings. I have that turned off; you have it turned on. FWIW, as a test, you may want to turn that off in Device Settings and turn on “relative Z moves only”. That has worked well for me.
Edit: I have deleted a comment that I made in reference to “air assist”. I believe that it did more to confuse members than help. I apologize for any confusion that I caused.