HEIDENHAIN TNC 335 Technical Manual - Manual (Page 199)

4-102
TNC 360 4 Spindle 8/95
4.4.2 Tapping with floating tap holder and coded spindle-speed
output
The following diagram shows the sequence of events in the cycle:
0
F
0
S
M03
M05
M04
Acknow-
ledgement
of M code
M2048
Cycle
start End of
cycle
MP7120.0
Dwell time from
CYCL DEF 2.3
MP7120.1
Since, when using the spindle speed output in code, the spindle- and feed ramps cannot be
synchronized by the NC, a machine parameter MP7120.1 was introduced to enable the spindle to be
switched off early. M05 is automatically output by the NC and must be acknowledged.
The machine parameter MP7120.0 (dwell time for change of direction of rotation) and the
programmable dwell time are just as effective as for analog spindle-speed output.
MP7120.1 Advanced switch time of spindle for "tapping" cycle (only active with BCD output
of spindle rpm)
Input value: 0 to 65.535 [s]