once again, I want to thank y'all for the helpful advice.
when this sucker works ... it works flawlessly.
To my knowledge, this is the first time ever had trouble of this degree.
That woman who ushered me into the work area, she is the operator.
She told me the system worked and then quit. She replaced the tip and it still didnt fire. So she called the owner and he said to get me to check the fuses on the main board.
Those were fine.
There is air pressure. And the servo motors operate to move the head around the table.
The ground has been cleaned, verified and re-inspected. All the grounds.
I will know more tomorrow morning.