HEIDENHAIN TNC 335 Technical Manual - Manual (Page 182)

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TNC 360 4 Spindle 4-85
The following diagram illustrates the relationships:
U [V]
[rpm]
MP3210.1
= 8 V
MP3210.0
= 6 V
MP3240.1
= 1 V
3375
MP3515.1
1875 750 0 250 3000
MP3510.1
1500
MP3510.0
I II
Gear range I: 1 500 rpm at 6 V (MP3510.0; MP3210.0)
Gear range II: 3 000 rpm at 8 V (MP3510.1; MP3210.1)
Upper spindle override limit: 125 % (MP3310.0)
Lower spindle override limit: 50 % (MP3310.1)
Maximal permissible output voltage: 9 V (MP3240.0)
Minimal permissible output voltage: 1 V (MP3240.1)
4.1.4 Gear change
Gear change is controlled by the PLC program. Up to eight gear ranges are available, coded in Word
W256. The NC enters the gear code for the gear ranges one to eight in Word W256, – according to
the programmed spindle speeds in the NC program (see MP3510).
After setting the gear code, the marker M2043 is set by the NC as a strobe signal.
The spindle speed which is programmed in the NC program as TOOL CALL S is stored in
Doubleword D356 and D756 in 1/1000 [rpm] by the NC. If a different spindle speed (from the spindle
speed fixed by the NC) is to be activated by the PLC, the speed must be entered by the PLC in
D756, this can then be activated by marker M2814 .
MP3240.0
= 9 V