G86 Boring cycle

                                                          The G86 Boring cycle spindle stop Work similar to the G85 Boring cycle or the G81 Drilling cycle, But the difference is there will be no retract in the feedrate motion. In some cases Using G85 for boring tool may make the finish of the hole worse rather than improving because of removal of material in backward motion. In this G86 cycle the spindle is stopped as the depth of the hole is reached and the tool is retracted in rapid. This cycle is typically used for Roughing and semi finishing of the Holes.

Code line for G86 Boring cycle Spindle stop:

N100 G98 (G99) G86 X… Y… R… Z… F…

Diagram for G86 Boring cycle Spindle stop:

Steps for the G86 Boring cycle Spindle stop:

 1.       Rapid motion to XY position of the hole position.

       2.       Rapid motion to the R level, i.e., to the top of the hole position.

       3.       Feedrate motion to the depth in Z.

       4.       Spindle rotation STOP.

       5.       Rapid retract to the initial level (with G98) or Rapid retract to R level (with G99).