Tapping cycle G84 <W5DTap>
Tapping cycle <W5DTap(484)> (G84) performs rapid approach to the <Z return> level, thread tapping with subsequent retraction at work feedrate with reverse spindle rotation.
G84 tapping cycle includes:
Rapid approach to the hole center at the <Z return> level.
Rapid travel to the <Z safe level>.
Work feedrate motion the <Z min> level.
Spindle reverse rotation and work feedrate trave to <Z safe> level.
Rapid retract to the <Z return> level.
Restore spindle rotation direction and speed.
If the appropriate setting is enabled, then tap retracts to break / remove chip during the cycle execution. Way to break chips is determined by CLD [20] parameter.
CNC-systems often have different tapping canned cycles for fixed and floating socket types. Socket type is specified by the <CLD[19]> (CLD.CLParams(17)) parameter.
Parameters:
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Description |
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CLD[1] |
CLD.SubCmd |
Command type: ON(71) – canned cycle on, CALL(52) – canned cycle call, OFF(72) – canned cycle off. |
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CLD[2] |
CLD.SubType |
Canned cycle type identifier: W5DTap(484). |
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CLD[3] |
CLD.CLParams(1) |
Nx, X coordinate of the tool normal vector |
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CLD[4] |
CLD.CLParams(2) |
Ny, Y coordinate of the tool normal vector |
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CLD[5] |
CLD.CLParams(3) |
Nz, Z coordinate of the tool normal vector |
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CLD[6] |
CLD.CLParams(4) |
Sf, Normal distance from current tool position to the safe plane level |
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CLD[7] |
CLD.CLParams(5) |
Tp, Normal distance from current tool position to the hole top level |
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CLD[8] |
CLD.CLParams(6) |
Bt, Normal distance from current tool position to the hole bottom level |
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CLD[9] |
CLD.CLParams(7) |
Work feed measurements: 0 – mm/rev, 1 – mm/min |
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CLD[10] |
CLD.CLParams(8) |
Work feed value |
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CLD[11] |
CLD.CLParams(9) |
Approach feed measurements: 0 – mm/rev, 1 – mm/min |
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CLD[12] |
CLD.CLParams(10) |
Approach feed value |
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CLD[13] |
CLD.CLParams(11) |
Return feed measurements: 0 – mm/rev, 1 – mm/min |
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CLD[14] |
CLD.CLParams(12) |
Return feed value |
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CLD[15] |
CLD.CLParams(13) |
Delay at the bottom level in seconds |
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CLD[16] |
CLD.CLParams(14) |
Delay at the top level in seconds |
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CLD[17] |
CLD.CLParams(15) |
Thread step |
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CLD[18] |
CLD.CLParams(16) |
Initial spindle angle in degrees (for multistart threads) |
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CLD[19] |
CLD.CLParams(17) |
Tap socket type: 0 – floating (compensative), 1 – fixed (uncompensative) |
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CLD[20] |
CLD.CLParams(18) |
The way to break chip : 0 – without chip breaking, 1 – chip removing, 2 – chip breaking |
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CLD[21] |
CLD.CLParams(19) |
St, chip breaking step value |
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CLD[22] |
CLD.CLParams(20) |
Dg, each iteration chip breaking step degression |
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CLD[23] |
CLD.CLParams(21) |
Dc, before drilling deceleration value for each step |
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CLD[24] |
CLD.CLParams(22) |
Ld, each step lead out value for cutting process breaking |
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CLD[50] |
CLD.CLParams(48) |
What spindle is used to machining: 1 - driven tool, 2 - workpiece spindle (lathe). |
See also: