HEIDENHAIN TNC 620 User Manual page 82

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Table of Contents

Fixed Cycles: Drilling

UNIVERSAL DRILLING (Cycle 203)

Dwell time at depth Q211: Time in seconds that

the tool remains at the hole bottom. Input range 0 to

Feed rate for retraction Q208: Traversing speed of

the tool in mm/min when retracting from the hole.

If you enter Q208 = 0, the TNC retracts the tool at

the feed rate Q206. Input range 0 to 99999.999,

alternatively FMAX, FAUTO

Retraction rate for chip breaking Q256

(incremental): Value by which the TNC retracts

the tool during chip breaking. Input range 0.000 to

Depth reference Q395: Select whether the entered

depth is referenced to the tool tip or the cylindrical

part of the tool. If the TNC is to reference the depth

to the cylindrical part of the tool, the tip angle of the

tool must be defined in the T ANGLE column of the

TOOL.T tool table.

= depth in relation to the tool tip

= depth in relation to the cylindrical part of the tool

HEIDENHAIN | TNC 620 | User's manual for cycle programming | 9/2015