HEIDENHAIN TNC 306 Technical Manual - Manual (Page 187)

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TNC 406/TNC 306 6 Display and operation 4 4-87
6.7.2 Cycle Scaling factor
Machine parameters can be used to decide whether the "Scaling factor" cycle only operates in the
machining plane or also parallel to the tool axis.
MP7410 Cycle "Scaling factor" effective in two or three axes
Entry: 0 or 1
0 = "Scaling factor" operates in all three principle axes
1 = "Scaling factor" only operates in the machining plane
6.7.3 Disk Cycle
The Disk cycle makes it possible to program various electrode motions through MOD entries (see
your User's Manual).
The sparking-out is also influenced by MOD entry:
MOD 0 to 3 fast sparking out
MOD 4 to 7 complete sparking out
MOD 0 to 3
As soon as the Disk cycle is started in the NC program, the NC sets Marker M2786. When the final
vector is reached (i.e. the electrode has reached the programmed depth and radius), the NC sets
Marker M2783.
When the generator sets Marker M2616 (sparking out process ended) through a PLC input, it starts
a Timer (MP2110, e.g. 2 sec). If the Marker is not reset within this time, the sparking out will
continue for 1¼ revolutions past the point at which the marker was set. The cycle is then finished
and the NC subsequently sets Marker M2790.
If Marker M2616 is reset within the time from MP2110, the timer is also reset, and it is restarted
when the marker is set again. The sparking out process begins again.
MOD 4 to 7
As soon as the Disk cycle is started in the NC program, the NC sets Marker M2786. When the final
vector is reached (i.e. the electrode has reached the programmed depth and radius), the NC sets
Marker M2783.
When the generator sets Marker M2616 (sparking out process ended) through a PLC input, it must
remain set for 1¼ revolutions so that the cycle can be recognized as “finished eroding”. Then the
NC sets Marker M2791.
If Marker M2791 is reset within these 1¼ revolutions, the sparking out process begins again.
Feed rates for MOD 0 to 7:
The feed rate in the direction of the expansion vector (see the User's Manual) is determined by the
gap monitor.