4  Fixed Cycles on the Mill  G73





G73  peck drilling cycle. G73 X1. Y1. Z1. R.1 Q.1 F10 G99 The peck drilling cycle rapids to the XY coordinates and then to the R plane where it begins to feed down in increments of Q at a feed rate of F to a depth of Z. At the end of each Q increment the drill will stop and back off about .005 to break a possible stringer chip and then continue with he next increment of Q. As in all pecking cycles the programmer does not need to calculate the number of pecks and peck distance that will equal the exact Z Depth. The controller will calculate the distance of the last peck to coincide with the Z depth. At completion G99 returns the drill to the initial plane.(G98 would return to the R plane) 
