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General Mach Discussion / Plasma cut quality problem
« on: September 24, 2009, 08:07:22 PM »
Hello, I've got a plasma cut quality problem and just can't get to the next step with it. Progress in all areas except for this. See attached photos. I've got some hesitation in arcs. No problem in circles, squares, triangles, or lines. Just at the end of one arc and the start of another arc, like in the 4in fleur-di-lis. Maybe a 15 - 20ms hesitation, just enough to see when the machine is running at 50 to 60in per minute. The faster The machine runs, the more outstanding the marks become.
I've got good repeatability to about .0005 - .001 and have good accuracy. I've worked on the motor tuning / velocity, and speeds till I'm at my wits end.
I'm using autocad 8 to make the drawing, save as a .dxf, import into sheet cam to post. I don't believe it's mechanical because of the time I've spent. I believe it's in something I've got wrong in Mach or it's the way I'm making the G-code.
Any suggestions would be greatly appreciated. I've been hammering on this problem along with other things for about a month.
Thank You! Aj
I've got good repeatability to about .0005 - .001 and have good accuracy. I've worked on the motor tuning / velocity, and speeds till I'm at my wits end.
I'm using autocad 8 to make the drawing, save as a .dxf, import into sheet cam to post. I don't believe it's mechanical because of the time I've spent. I believe it's in something I've got wrong in Mach or it's the way I'm making the G-code.
Any suggestions would be greatly appreciated. I've been hammering on this problem along with other things for about a month.
Thank You! Aj