hypertherm 45xp torch problems

[zultek]

Hello= just brought a used 45xp and the torch fires for about 5 seconds then flame goes out and the postprocess air is on for about 20 seconds. I put new consumables in torch, air pressure from compressor is 100psi, dry air, trap on cutter is clean and dry, no warning lights on the front panel. thanks

[adbuch]

Is this cutting by hand or cnc operation?
David

[robertspark]

is the workpiece clamp connected?

[zultek]

Hello- I am holding the torch in free air ,not cutting as my other cutter when I hold in free air and push the switch the arc starts and stays on till i release the trigger just checking unit out if damaged or not as it is used thanks I will try cutting a piece of metal in the morning and see if it works

[adbuch]

Hello- I am holding the torch in free air ,not cutting as my other cutter when I hold in free air and push the switch the arc starts and stays on till i release the trigger just checking unit out if damaged or not as it is used thanks I will try cutting a piece of metal in the morning and see if it works

Holding in "free air" is a NO GO. You need to connect your work lead to a piece of material you want to cut and then proceed to cut with your torch.
David