Neje Max3 air assist issue

Hi, I have a problem the the air assist control on my Neje max 3 A40640 setup. It has the relay fitted as per spec to control both the air pump and exhaust fan. I only have it configured for air assist as I do not want exhaust to turn off immediately at end of job. The problem is that if the job in hand has a requirement for both air assist on and air assist off it will do one OK but when switching to the other it stops and Lightburn and machine are frozen. Only recourse is to exit Lightburn and restart.
I have tried both the M7 and M8 ports but result is the same, I have also replaced the standard USB cable for a better shielded cable plus I have fitted Ferrite chokes to all cables, all to no avail.
As it stands my setup is very basic, relay turns air pump on/off via M7 / M9 code according to settings in the cuts and layers tab. I also am not utilising the auto air valve assembly supplied as I feel it is too restrictive.
Following is a supprt data dump following a failed test.
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

I’m reviewing the support data you’ve offered.

Another file that would be informative is the GCode file, Click File, click Save GCode. If you rename it with a .txt extension you can upload it to the forum and I’ll look at it when you reply.

I’m interested in the relay and I would like to know the Spec if you’re willing to share. A picture of the Part number on the relay should point me at a data-sheet which will show me what the back EMF strategy is. If there are adjacent components - that helps too.

When the coil in an electromechanical relay is released a voltage spike is created. Depending on the speed of the field collapse the voltage can be 3x to 5x higher than what was holding the relay in place and to make matters worse, the voltage is backwards to what was supplied.

I’m sure there’s some trapping or conditioning to manage this spike and it’s absolutely routine to do so but I’d like to confirm it.

A diode and or Zener diode clamp and a resistor in parallel would take almost all of it out. Many relays have some or all of these parts built in - across the trigger coil.

This is Great! Thank you for this clarity.

If it’s a Back-EMF spike and if it’s coming in on the M7 or M8 CPU output or signal lead it could lock up the controller.

The next test would be, looking at the GCode for when the relay changes states and noting where that happens in the job. Selecting “Show all” in the Console window, running the job, saving all the text and code from the Console window and seeing if a glitch shows up.

I have seen back emf and static electricity hit the power supply of the engraver hard enough to reboot the controller or hang USB communication as you describe. I had a vent fan cause EMF noise because it was plugged into the same power bar as the engraver. Plugging it in elsewhere leads me to think that noise came in on the AC Power line and through the Brick-Type power supply at the engraver.

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