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G81X1.0Y1.0R0.1Z-0.25F5.0 The drill cycle moves to the (X,Y) location of the hole start point and then rapids to the R plane. It then proceeds at the feed rate F to the final drill depth. The process is completed by a rapid move back to the R plane or I plane. Start Point of Hole I plane G98 R plane Material Surface G99 Feedrate Move Rapid Move Z Depth Fig. 17 - G81 Drill Cycle Operation G83 Peck Drilling Cycle Description: The peck drilling cycle is a necessity anytime deep holes must be drill. Drilling a deep hole continuously to the hole depth would surely fail since chip load buildup occurs. The drill must be retracted to let the chips out and then re-enter the hole and proceed toward the drill depth. The peck drill cycle allows just this process whereby the drill retracts and re-enters the hole repetitively each time drilling the hole a specified amount deeper until the final depth is reached. Figure 18 shows the process for the following command line which is described step by step below. G83X1.0Y1.0R0.1Z-1.0Q0.25F5.0 1. Move to the X,Y coordinate (1.0,1.0). 2. Start the drill process at the I plane ( Initial plane). 3. Rapid down to the R plane. 24
