HEIDENHAIN TNC 306 Technical Manual - Manual (Page 163)

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TNC 406/TNC 306 4 Gap control 4-63
4.7.1 Eroding parameters as Q-parameters in the NC program
If machine parameter MP2199 = 0 (erosion tables not active), Q-parameters Q90 to Q99 are
reserved for the storage of eroding parameters and are transferred to the PLC doublewords D668 to
D704 accordingly.
D668 Q-parameter Q90 (NC
→ PLC)
D672 Q-parameter Q91
D676 Q-parameter Q92
D680 Q-parameter Q93
D684 Q-parameter Q94
D688 Q-parameter Q95
D692 Q-parameter Q96
D696 Q-parameter Q97
D700 Q-parameter Q98
D704 Q-parameter Q99
4.7.2 Eroding parameters in erosion tables
If machine parameter MP2199 = 2 (erosion tables active), the eroding parameters are stored in the
form of erosion tables and transferred to the PLC addresses as defined below. Furthermore, Q-
parameters (Q96–Q98) are also used for NC to PLC transfers.
D412 Q-parameter Q96 (NC
→ PLC)
D416 Q-parameter Q97
D420 Q-parameter Q98
B666 Maximum power stage
B667 Minimum power stage
B668 Power stage number NR 1) (.E - table
→ PLC) can be changed during
machining via Q-parameter Q99
B669 Low voltage current LV 2)
B670 High voltage current HV 2)
B671 Nominal gap voltage GV 2)
2) These eroding parameters can be
W672 Pulse on duration TON 2) temporarily changed during machining
B674 Pulse off duration TOF 2) via the screen status display
B675 Servo sensitivity SV 2) (.E - table
→ NC)
W676 Auto Jump Distance AJD 2) (.E - table
→ PLC)
W678 Erosion Time ET 2)
B680 Arc sensitivity AR
B681 Polarity electrode P
W682 High voltage selector HS
W684 Wear rate WR
W686 Surface finishing RA
D688 Stock removal SR
W692 Two-times gap 2G
W694 Minimum undersize UNS
B696 Auxiliary parameter 1 AUX1
B697 Auxiliary parameter 2 AUX2
B698 Auxiliary parameter 3 AUX3
B699 Auxiliary parameter 4 AUX4