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If you are using a typical Fanuc postprocessor, you may need to configure the Centroid control so that its canned drilling cycles will drill a hole any time Z is given, even if X and Y are omitted.
To do so, set Centroid Machine Parameter #2 to a value of 2.0.
This feature works with any version of Centroid's CNC10 Linux-based control software, and with version 7.06 or higher of Centroid's CNC7 DOS-based control software.
To set Parameter 2:
Note that Parameter 2 is a bit-mapped parameter which also controls some additional G code interpretation options. To determine the correct value for Parameter 2, you add up the values for the options you want, and enter the sum. The options are as follows:
|Flag||Value||Meaning (include value if:)|
|Absolute arc centers||1.0000||You want I/J/K arc centers to be absolute instead of incremental, when in G90 mode|
|Drill with Z alone||2.0000||You want canned drilling cycles to drill in the current X/Y location when only Z is specified|
|Dwell times in milliseconds||4.0000||You want to specify dwell times (G4, G82, G84 etc.) in milliseconds instead of seconds|
|Slave rotary feedrate to linear movement||8.0000||You want the rotary axis or axes to move as fast as necessary to keep up with linear feedrates (in/min)|
|Scale/rotation center at current position||16.0000||You want the default center point for G51 scaling and G68 rotation to be the present position, instead of X0 Y0 Z0|
See the M-Series Operator's Manual Chapter 14 (Configuration) for additional information on this parameter and its options.
See M-Series Operator's Manual Chapter 12 (G Codes) for additional information on drilling cycles, arc centers, dwell times, scaling and rotation.
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Copyright © 2008 Marc Leonard
Last updated 02-Sep-2008 MBL