System information

SECTION FOUR - PREPARATORY FUNCTIONS (G CODES)
Back Boring cycle (G87)
6. Feeds up to Z depth
G87, G98 F____ R____ Z____
The distance and angle is specified by control parameters "Bore Relief Angle" and "Bore Relief
Distance".
The G87 command specifies the back bore drilling cycle. At each axis position, this cycle will
execute the following.
1. Orients the spindle
2. Rapids in XY (using the CTRL parameters used in the G76)
3. Rapids to point R (normally at the bottom of the hole)
4. Moves to original XY position
5. Starts the spindle
7. Orients the spindle
8. Moves in XY (specified by Bore Relief Angle and Bore Relief Distance)
9. Rapids up to initial point
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