Friday, December 11, 2015

G81 Drilling cycle

                  The drilling cycle gcode G81 is canned cycle and is a simple drilling cycle used for drilling the hole without the dwell at the depth of the hole is not required. Mainly this cycle is used for the center drilling and the holes with small depth.

Code line for G81 Drilling cycle:


 N100 G98 (G99) G81 X... Y... R... Z... F...


Diagram for G81 Drilling cycle:



Steps for the G81 drilling cycle:


 1.       Rapid motion to the 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 of the hole in Z
       4.       Rapid retract to the initial level (with G98) or Rapid retract to R level (with G99).

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