Teach-in | Thread and undercut cycles
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HEIDENHAIN | MANUALplus 620 | User's Manual | 12/2017
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.
IC: Number of cuts – the infeed is calculated from IC and U
Usable with:
GV = 0: Constant chip cross section
GV = 1: Constant infeed
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)
Type of machining for technology database access:
Thread cutting
Cycle run:
1 Calculate the proportioning of cuts
2
Start the first thread groove at the Start point Z
3
Move to the End point thread Z2 at the programmed feed rate
4 Return on a paraxial path and approach for the next thread
groove
5 Repeat 3 to 4 for all thread grooves
6 Approach for the next pass, taking the reduced cutting depth
and the Approach ang. A into account
7
Repeat 3 to 6 until No.gears D and Thread depth U are reached
8
Move to the Tool change point according to the setting in G14
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