HEIDENHAIN 548431-05 User Manual page 331

Teach-in | Thread and undercut cycles
GV: Type of infeed
Further information:
0: Const. mach. X-section
1: Const. infeed
2: EPL with distrib. of cuts
3: EPL w/o distrib. of cuts
4: MANUALplus 4110
5: Constant infeed (4290)
6: Const. w/ distrib. (4290)
GH: Type of offset
0: Without offset
1: From left
2: From right
3: Alternating left/right
A: Approach ang. (range: –60° < A < 60°; default: 30°)
A < 0: Infeed on left thread flank
A > 0: Infeed on right thread flank
R: Rem. cut depth (only with GV = 4; default: 1/100 mm)
E: Incremental gradient – Variable thread pitch (e.g. for
manufacturing spiral conveyors or extrusion shafts)
Q: Number no-load.
MT: M after T: M function that is executed after the tool call T
MFS: M at beginning: M function that is executed at the
beginning of the machining step
MFE: M at end: M function that is executed at the end of the
machining step
WP: No. of spindle – Displays which workpiece spindle is used
to execute the cycle (machine-dependent)
Main drive
Opposing spindle for rear-face machining
BW: Angle in the B axis (machine-dependent)
CW: Reverse the tool (machine-dependent)
HC: Shoe brake (machine-dependent)
DF: Miscellaneous function (machine-dependent)
Cycle run:
1 Pre-position the threading tool to the center of a thread groove
2 Use the Take over position soft key to transfer the tool
position and the spindle angle to the Measured position ZC and
Measured angle C parameters
3 Move the tool manually out of the thread groove
4 Position the tool in front of
5 Start the cycle with the Input finished soft key, and press the
NC start key
HEIDENHAIN | MANUALplus 620 | User's Manual | 12/2017
"GV parameter: Type of infeed", Page 313
the workpiece
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