HYPERTHERM 125

[jim8014]

I am trying to cut 1 1/4" hole in 1 " plate and seem to have a lot of angularity from the top to bottom of the kerf. is this the nature of the beast or are my setting wrong on the machine

[djreiswig]

Are you running book speed? I have better results with holes when I slow the speed down. You'll have to play to see how much will give you good results. In thinner material I've gone down to as low as 40-50%. Slowing down allows the arc to catch up.

[adbuch]

[TJS]

As well as slowing down on holes as stated above. When I am also cutting holes on thicker material I give it some overcut/overburn so I get a complete cutout.

[weldguy]

New consumables, dry air, correct cutting height, and 50-60% slower cut speed than book suggests for small interior cuts like this

[Dakotab2507]

Hypertherm recommends a perpendicular lead in with an arc lead out small circles and bolt holes. You could also set up a path rule in sheetcam to turn off torch height controller on holes smaller than 2 inches and set feedrate to 60%. This will help with the Bevel.

[jim8014]

Thank you so much guys, took all your advice, started from square one and all is well!!

[jim8014]

Did one thing at a time, turned speed down to 50% of straight line and turned off torch height controller, those two things made the biggest difference.

Thanks again

[adbuch]

[weldguy]

[Arclight Dynamics Tech]

Did one thing at a time, turned speed down to 50% of straight line and turned off torch height controller, those two things made the biggest difference.

Thanks again

Glad that worked- when creating an operation in Sheetcam, make sure under Path Rules it is set to Standard Rules. This automatically slows the torch down to 60% and turns DTHC Off. Make sure the air is clean and dry to maximize cut quality