HEIDENHAIN TNC 406 - Manual (Page 233)

212 10 Programming: Q Parameters
1
0.9 Q P
ar
amet
ers with Special F
u
nctions
Example: Cavity with DISK cycle
Program sequence
„ The program accesses the minimum undersize
UNS with indexed data assignment via the
power stage.
„ The minimum undersize UNS is located in the
erosion table.
„ Calculations in the program:
Undersize UM = D – 2 • R
Expansion radius RAD = 0.5 • ( UM – UNS )
„ The depth of cavity T is reduced by the value of
UNS programmed in the DISK cycle. The
electrode radius must be larger than the radius
of the cavity (= 0.5 • D=20 mm).
0 BEGIN PGM QDISK MM
1 FN 0: Q1 = – 10 Depth of cavity T
2 FN 0: Q2 = + 40 Diameter of cavity D
3 FN 0: Q99 = 6 Power stage
4 BLK FORM 0.1 Z X+0 Y+0 Z–20 Define the workpiece blank: MIN point
5 BLK FORM 0.2 X+100 Y+100 Z+0 Define the workpiece blank: MAX point
6 CYCL DEF 1.0 GENERATOR Cycle GENERATOR (see ”Cycle 1 GENERATOR” on page 133)
7 CYCL DEF 1.1 P-TAB 100 Select erosion table (here, table 100)
8 CYCL DEF 1.2 MAX=6 MIN =6 Set power stage
9 TOOL DEF 1 L+0 R+12 Define electrode in the program
10 TOOL CALL 1 Z U+1 Call electrode in the infeed axis Z, undersize 1 mm
11 L Z+100 R0 F MAX M Retract in the infeed axis; rapid traverse; insert electrode
12 L X+50 Y+50 Z+2 R0 FMAX M Starting position
13 FN 3: Q10 = +2 * +Q108 Calculate electrode diameter
14 FN 2: Q10 = +Q2 – +Q10 Calculate undersize UM
15 TOOL CALL 1 Z UM +Q10 Call tool with UM
16 FN 16: Q11 = Q231(Q99) Determine UNS
17 FN 2: Q12 = +Q10 – +Q11 Calculating the expansion radius RAD
X
Z
RAD
UM
2
D
Re
UNS
2
V