G88 Boring Cycle

Format

G88 X_Y_Z_R_F_ K_

Machining Process

Machining process of G88 is as illustrated as follows:

  1. The tool moves to the specified hole position (X, Y) at G00 speed.
  2. The tool goes down to the specified point R at G00 speed.
  3. The tool moves down to point Z at the bottom of the hole at G01 speed.
  4. The tool pauses for P.
  5. The spindle stops.
  6. The tool returns to point R at G01 speed.
  7. The tool returns to the initial point (G98) or point R (G99) at G00 speed.
  8. The spindle rotates CW.

Programming Example

F1200 S600

G90

G00 X0 Y0 Z10 'move to the initial point

G17

M03  'spindle CW on

G90 G99 'specify the coordinates of point R, point Z and hole 1, with dwell as 2(s), boring speed as 800

G88 X5 Y5 Z-10 R-5 P2000 F800

X25 'hole 2

Y25 'hole 3

G98 X5 'hole 4, and set to return to the initial point

G80

M05 'spindle stops

M02