Hi everyone i need your help my k40 behaves strangely with the radius of power and unstable so you can see on the ammeter you could tell me what is the problem? thank you
Could be the power level pot breaking done,try swinging pot front high to low a few times
This problem also occurs with the unplugged pwm what can these swings cause?
What liquid are you using for coolant on your laser? I have seen similar issues to this caused by too higher conductivity in the cooling fluid which causes current to leak into the coolant and bypass the gas in the tube.
I use 10lt of distilled water can this be the problem?
Distilled water is fine.
So what’s the problem I’m going through
Ok, well if the coolant isn’t the issue then i would look at the current POT. When my old one went on the K40 the current did fluctuate a few MA, nothing like yours… but it might be the cause of it. If you set the current pot so its just triggering the tube does it still fluctuate wildly or is it a lot more stable?
My k40 does not have a potentiometer but a d keypad
And even if I unplug the pipe and unstable
Do the numbers change for the % on your digital power controller? A friend once had an issue with his K40 with the digital controller where one of the pressure sensors failed and was constantly switching power up from 0 to 100% in 10% increments and then once it hits 100% it drops back down to 0 and cycles again.
Other than that i can’t think of anything else that would cause this issue except perhaps a failing HV power supply.
How do you know HV flyback? I noticed that passing the screwdriver on the fliback emits a spark
Never operate the HV PSU without tube connected! This could destroy the PSU.
To exclude PSU problems, you coud detach the frontpanel from the 3-pin connector on the psu and connect two resistors as voltage devider to the same connector. Something like 2x10kOhm resistors in series between GND (left) and 5V (right), and IN pin (center) connected between the resistors. This creates 2.5V on the IN pin, which should be the same like pot on half position.
If power is stable with the resistors, then your PSU and tube are ok. If it’s still unstable, then either the PSU or the tube have a problem.
Sorry I did not understand where and how to link the residences you could send me a photo?
@Camarda_Neon_Salerno is the video above taken while pushing test from the panel?
Can you post picture of supply.
+Camarda Neon Salerno are you holding the test button for the video above?
@Camarda_Neon_Salerno warning, that supply outputs LIFE THREATENING voltages.
I hold down the test button but this does not change even when I cut it I have the same problem