Thank you for the hint of the test switch on the PCB, that is bypassing all protection measures. The problem on my K40 was not the water flow, but the microswitch on the case was not pressed down enough. Pressing the test switch on the PCB made the laser tube emitting light, so I knew the tube was functional. Then the other "Test"-button on the outside did not
I had a similar problem (test button on supply would fire laser but panel test switch / software control could not). I don't have a flow sensor, but it ended up being a loose connection to the laser power switch! This video helped me debug in the right direction.
Thanks friend. My laser didnt fire up. Since I wached your video I was able to fix it up. In my case I had mistakenly interchanged water inlet and outlet
huh i do have a sensor is behind where the tube is ... the wires are lose moved it a bit there and it worked... hmmm someone glued it but it seems the glue somehow melted i guess now i got to fiddle it everytime i turn the machine on.
Hi thanks for the video, so does the jumper connect the 2 pins together, i don't have a small jumper could I cut and connect the 2 wires to each other instead.
thank you so much, but if the machine has no water sensor? my new laser machine has firing problem, the test button works but laser beam not firing ... can you help?
As a other commenter mentioned, it may be a loose connection on the control panel or power supply. Wish I could be more help but I haven’t dealt with this exact issue before. I’d seek some advice from the laser cutting community on reddit, lots of experienced people over there that could help you out. www.reddit.com/r/lasercutting/
@@JMKDIY thank you so much. I am actually dealing with my issue from beginning, from the first day I received the machine, but still no success, all the connections are checked, what about the software? Any experience about that? Is is possible that it's something wrong with instalation?
Hey I am trying to align my laser but when I started it the 1st time, my axis moved back and wouldn’t stop.(even if it had reached the end)...so I unplugged the wire from x- axis and plugged it in y-axes and now it wouldn’t move...what should I do?
My issue is: my laser fires in the home position to about 3” in width… after that the laser moves, I see the red dot, but nothing happens thereafter until it makes its way around the bottom of the design back toward the far left and picks right back up from 3” out to completion. What in the world could cause that????
I'm a new k40 (non engineer) person. How do I know what are the best amps for cutting 3mm acrylic? What number should I have my laser on for cutting, engraving and rastering? I have the identical laser to yours.
I haven't worked with acrylic yet, but I'd experiment and start with something around 20% to 30% power at 7 to 10ms for vector cutting. Do some small simple test cuts to get an idea. For engraving I prefer to run my laser at 350ms and setting the power to 15% to 23%. These lasers power supplies are capable of higher power than the tube can handle so never turn the power to more than 50%. Let me know if this helps. I also suggest checking out reddit.com/r/lasercutting - lot's of great info and people there that can help you out
Thanks for the video and leading to the water sensor. But no thanks for calling this a fix. This is a safety feature and should be properly repaired and not just be circumvented!
I agree. Good diagnosis of issue but need a follow through on repair work. If I performed this work I would have a replacement part on order the same day.
I repaired the sensor by just cleaning it. There was a lot of slime that accumulated inside. Just removed and rinsed it with high pressure water. Maybe even reversing the direction works already.
