@Dominykasssx I can't give you an exact value, but I would start with a 10kohm (1/8W would be ok) and if the laser doesn't turn off you go lower until it does. If it's not turning off by ~1kohm then you probably won't find a solution that works.
Say a 2.2kohm turns the laser off when disconnected, then you must check that the laser turns on with software control (TTL input connected).
i have just purchased the a4 engraver from banggood, all works fine But laser always on changed laser setting in benbox from 12 to 11 laser now turns on and off from benbox and pules and high and low buttons work; fantastic all works But no now the laser head wants to start engraving of the end of travel anyone no of a fix thanks using benbox 3,7,99, LX hex with nana se board
@grom I am having the same issue but strange that it is occurrring on the controller which you say it always work for you!!!
My laser does not have any button, just the control board. When I press the left red button, laser turns on immediatelly with full power and never stops until I turn off the Switch.
Pressing the right red button it works as a pointer (weak laser).
Do you know where you get the firmware that was working? I tested with several tools and all the same.
As I see - you use SVG files directly intended use with EggBot™. First thing - they a in pixel measures, not in millimeters. But that knowledge is also useless as EleksCAM did not render some SVG files correctly.
I had a similar issue so I added 4 1/32 flat nylon washers so that the there was a smooth yet tight surface that allowed the wheels to spin, Other wise the wheels were dragging and some places the belt would slip. This immediately solved my problem. If you look at the X axis it has spacers on each side if the wheels but the Y axis does not so the nylon flat washers add that. It worked for me, not smooth as glass.
@jeff I know for T2Laser when you select EleksDraw I change the max position to 45 (I could be slightly off on the exact number but it's between 30 and 50). If you try to travel more it will hit the stop and damage the servo.
If it's not working give the T2Laser trial a go, it also supports pen changes for different colors in the DXF and the optimizer and centerline tracing work great for this machine.
if you have a multimeter you can check what is going on. The s wire should go to the pwm pin on the laser and should read 5 volts when on and 0 when off. The - wire should be grounded. The + wire should be 12v continuously.
@Paul-den-Toom Sad to hear about same issue, i think mosfet on my board is short too, but it worked good on first start (~30 sec), before i started testing speeds change . I've bought another mainboard from Eleksmaker store. And i think that motor power must be from another power source (i hear RPM drops when stepper motors work).
Yesterday I assembled my EleksLaser-A3 Pro and installed the EleksCAM software. I got the "Unhandled exception" error mentioned in previous posts but just hit "continue" and all seemed to work correctly after that, at least for LineByLine mode.
I did note in the LineByLine mode it tries to do the lines in alternating directions and it works fine for the left to right direction. However when it does right to left it does not reverse the order of the segments. So it does the segments left to right while drawing each segment right to left. This causes a lot of back and forth motion and a huge loss in efficiency.