6 – 184 HEIDENHAIN Technical Manual TNC 426, TNC 430
6.12.3 Analog and Digital Closed-Loop Spindle Control
For both analog and digital output of the nominal speed command you can
program speeds from 0 to 99 999.999 rpm.
The maximum controllable spindle speed is:
If in MP3010 you have selected the output of the nominal speed value, M4003
is set. The programmed speed is saved in D356, the nominal speed value in
W320 and the actual speed value in W322. In addition, the nominal speed
value is saved in D364 and the actual speed value in D368, since speeds above
32 767 rpm cannot be represented in words W320 and W322.
With D604 you can limit the possible spindle speed through the PLC. To
ensure compatibility, D604 is preassigned with 99 999 999 after control
switch-on or after an interruption in the PLC scan.
Analog spindles:
The nominal speed value of the motor is output as an analog dc voltage of
±10 V at connection X8 or X9.
Digital spindles:
The nominal speed value is transferred to the internal speed controller.
TNC Maximum spindle speed
TNC 426 CB, TNC 430 CA 100 000 rpm
TNC 426 PB, TNC 426 without spindle DSP
(for motors with 2 pole pairs)
12 000 rpm
TNC 430 PA, TNC 426 M with spindle DSP,
TNC 430 M
(for motors with 2 pole pairs)
30 000 rpm
Set Reset
M4003 Nominal speed value output
analog or digital (MP3010 = 3 to 8)
NC NC
D356 Programmed speed [0.001 rpm] NC NC
D364 Nominal speed value [rpm] NC NC
W320 Nominal speed value [rpm] NC NC
D368 Actual speed value [rpm] NC NC
W322 Actual speed value [rpm] NC NC
D604 Maximum possible spindle speed PLC NC/PLC
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