My k50 or sh 350 laser stopped firing,I still have my trusty k40 and will sit the k40 on top of the other laser cutter and wire up the 50 watt tube to the k50 to test if it fires ,if it does the powe're supply is faulty on the k50.has anyone wired a k40 40 watt power supply up to a k 50 50 watt machine?
. If it does not fire will wire up the k50 power supply to the 40 watt k40 laser tube,then if it doesn't fire it is something else .
I suspect the power supply as water temp and flow where ok and it just stopped firing 1/2 way through a small etching job
the last time tube was faulty I just lost most cutting power slowly over 3 days and not straight up,checked tube for cracks and seams ok . Try ed test button power supply and did not fire,amp meter i showing 0 ma, can not here any arcing 
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