In drill operation when L/D ratio is very high or Depth of hole is greater than flute length of drill than peck drill to be used
Drill pecks in the peck drill operation in defined depth off period. Due to this chip is continuously. Peck of drill chip is continuously away from from the hole due to this reduces breakage chances.
Example of Peck Drill
Format of Peck Drill
G98 G83 X....Y....R....Z....Q....F....
In this format Q indicates the incremental depth of each peck and parameter i explained in my previous post
N100 G0 G91 G28 Z0
N102 G0 G90 G54 X15 Y25 M03 S1000
N104 Z50
N106 G98 G83 X15 Y25 R5 Z-10 Q1 F20
N108 X50 Y40
N110 X60 Y20
N112 G80
N114 G0 G91 G28 Z0
N116 M05
N118 M30
Here the simulation of Peck Drill
