Laser not turning off while traveling
Hi, so when I start cutting the laser just won't turn off while traveling I have tried $31 $30 $32 stuff if I remember correct, I also checked that cables are properly connected and tightened. Any ideas?
Hi the laser on/off is done via G-code commands M4 and M5. The LO signal (Laser On) is connected from the K40 terminal block on the left to the big connector on the Mini Gerbil. If that connection is loose or not connected then the laser stays on. You can measure with a multi meter the connection when powered off (ohm setting) or measure if the voltage is zero when at rest (should be 5 V dc at rest). Sometimes the prong in the big connector travels up into the connector housing causing a loose or bad connection. So use a small instrument screw driver to push it gently back and re-seat the connector on the Mini Gerbil.
The $ settings are for configuration purposes only not for G-code streaming data.
Cheers, Paul
I checked and i couldnt see any problems in them i am using lightburn btw
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The pvm wire seems to have no diffdrence if i plug it in or not, when i set 0% power and click test fire the laser still fires at probably max power
Hi,
thanks for the photo. From the top I can't see if the your K40's plug is secure - I've seen even a hairline gap cause a problem. Yes, K40 plugs are made to a price!
Please check the attached image and confirm your plug and socket are fully connected as shown, and that the pins are properly seated down inside the plug. The left pin shown in the photo is the LO, so that is the most likely problem area.
Regards,
Dan
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They are properly connected, the issue was fixed by command $30=255 for a while but now the issue has returned
If the problem is coming and going randomly then it's unlikely to be caused (or fixed) by software. A problem coming and going is more likely hardware related.
Is there anything you can think of that's changed between when it was working and when it wasn't?
I believe you're reviewed grounding issues (a common cause of intermittent problems) already? https://awesome.tech/k40-laser-grounding-instructions/
We once had a customer with similar problems, which we eventually found were caused by other equipment on the same powerpoint (wall socket)... pumps, motors, etc? If you have similar, please try unplugging and see if they are causing interference.
I can't think of anythinf that changed, and also i don't have any devices plugged to same slot. But as it works with m2 board steppers inclluded id suspect the gerbil board
Those metal thingd can go little bit farthwr but they just push back? I can solder them but idk if thats what you want?
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Okay update now everything else than the laser off works, now we just need to fix the laser off during travel and k think its a ligtburn side issue?
Not turning off while travelling is still the same issue - I think there is a poor connection somewhere. Could you please carefully check the area I have circled in red? Is the wire showing enough metal, and is the screw tight?
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I fixed it my own $30=255 $32=1 and i adjusted stepper motor currents so it works perfectly now