Newbie Laser Questions (JTech 7W+)

Accessories J Tech Laser
1

Hi - I just received my Jtech 7W+ laser for my woodworker running with the BB controller and have a couple of novice questions. I have successfully installed and test fired the laser using M3 Sx commands. I do not plan to do any cutting, just engraving.

  1. When testing the laser I started at M3 S10 and was able to step down to M3 S1. Only M3 S0 did not fire the laser. S10 down did not burn the test piece - as expected - but the brightness of the laser appeared to be the same from S10 down to S1 which may or may not be normal. Is this good, bad or just a function of the fact each laser is different?

  2. When configuring Lightburn I set the laser as GRBL-M3 per the installation videos and instructions on both JTECH and Onefinity websites. I am running the latest BB controller firmware. My understanding is the BB controller is now running GRBL 1.3. Can I instead config the laser in Lightburn as GRBL rather than GRBL-M3? I understand M4 is generally preferable to M3 since this allows for variable power.

Thanks in advance for any insights.

2

Hi Grant,

  1. yes, that’s normal
  2. no, keep it grbl-m3
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3

Great - thanks for the quick response!

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