Originally Posted by
jimskeet
Hi guys. I had this happen today.
I have built a cnc machine that uses mach3 and my break out board is HY JKM5.
While the machine was running my brother was using a tig welding unit and he was welding some pieces. The tig welding unit was connected to a different power outlet.
At one point he touched the metal piece with the tip of the torch and the machine suddenly stoped with an estop message.
After that. I shut the control down, restarted the PC and when tried to power on the control I have this behavior.
The moment the break out board gets powered on, it turns on the spindle relay. When I try to jog the machine, the dro indicators on mach3 move as expected but the machine doesn't move.
The input signals are working fine cause when I touch the home limit switches or the tool touch plate, signals are recorded as expected on mach3 diagnostics page.
Also another thing I noticed is this. I use leadshine closed loop steppers. Before when I powered on the control, the axis motors would get powered and locked to hold the position of the axis. I couldn't rotate the axis by hand. Now after the incident, when I power on the control, stepper motors dnt react at all and I can rotate them freely. And when I power it down they jerk a tiny bit.
Also forgot to mention that when I power on the control, everything seems to work fine inside. Drives show the normal operation green light and no error flashing red light, power supplies measure the correct voltages and even the red light of the break out board is on.
So to summarize the symptoms are, spindle relay goes on when I power on the control (while spindle signal is off on mach3). No axis movement possible, and stepper motors are not holding position when powered on.
I believe that the break out board is damaged and went ahead and ordered a new one to be on its way. Is there anything else that can create this issue other than the break out board??
Also why did this happen with the tig weld and how can I prevent it in the future, other than avoiding using the tig weld while the machine is on?
Any help more than welcome!