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Topics - jack1234

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General Mach Discussion / continuous motion and tangential cutting problem
« on: November 17, 2010, 12:30:44 PM »
hi

i use my cnc to cut with a knife with tangential motion on, and the feed rate is very fast compared to milling. what i notice is that the motion stops at each point, or code line, and then starts again, resulting in the machine shaking.

i wonder if anyone knows how to get continuous motion so that the axes move wit smooth flowing motion?

another problem i cannot solve is that for tangential knife cutting the knife will spin (A axis) in the material at what appears to be random times - it generally works fine, and only seems t do this once per cut-out shape.

many thanks.

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I need to tangential knife cut cardboard shapes from vector artwork imported from graphics applications. i have tried exporting a vector image from adobe illustrator as a dxf file and reading it through lazycam but i do not get a very good result.  the curves generated are all wrong, and the machine seems to jump from point to point around a curve, causing a lot of juddering and vibration, instread of cutting with a smooth motion. sometimes i don't get a curve at all but a 'join the dots' effect made up from small straight lines.

does anyone have experience of this and know of a better system to use? many thanks.

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General Mach Discussion / disable / enable tangential cutting in G code
« on: January 27, 2010, 02:46:51 PM »
Hello

can anyone help, i need to disable / enable tangential cutting within the G code.

Many thanks.

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