Posts tagged Calculation from the G-Code Sprint team.
Program a lathe chamfer two ways: calculate the endpoint with simple trig, or use the automatic corner chamfer. Remember X is a diameter, so double the radial leg.
Chip load connects tool data to the F word: compute feed forward from chip load, audit any program in reverse, or let macro variables do it in the code.
Taper turning in G-code is two diameters and a Z length: program both X ends and let G01 interpolate. The formulas, a worked example, and the comp trap.
G97 locks the lathe spindle to one RPM, so you compute it yourself: surface speed and diameter in, RPM out. The formula, the diameter choice, the cases.
I and J are the distance from the arc's start point to its center: I = center X minus start X, J = center Y minus start Y. Two worked examples and a self-check.