Universal Drilling (Cycle 203, Din/Iso: G203); Cycle Run - HEIDENHAIN TNC 640 User Manual

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UNIVERSAL DRILLING (Cycle 203, DIN/

Behavior without chip breaking and without decrement:

1 The TNC positions the tool in the spindle axis at rapid traverse

FMAX to the programmed SET-UP CLEARANCEQ200 above the

workpiece surface

2 The tool drills at the programmed FEED RATE FOR

PLNGNGQ206 to the first PLUNGING DEPTHQ202

3 Then the TNC removes the tool from the hole to SET-UP

CLEARANCEQ200

4 The TNC now again plunges the tool at rapid traverse into the

hole and then again drills an infeed of PLUNGING DEPTHQ202

FEED RATE FOR PLNGNGQ206

5 When machining without chip breakage the TNC removes the

tool from the hole after each infeed with RETRACTION FEED

RATEQ208 to SET-UP CLEARANCEQ200 and remains there for

the DWELL TIME AT TOPQ210.

6 This procedure is repeated until depth Q201 is achieved.

7 When depth Q201 is achieved, the TNC removes the tool with

Fmax from the hole to the 2nd set-up clearance Q204

Fixed Cycles: Drilling | UNIVERSAL DRILLING (Cycle 203, DIN/ISO: G203)

HEIDENHAIN | User's manual for cycle programming | 10/2017