HEIDENHAIN TNC 306 Technical Manual - Manual (Page 465)

9-10
TNC 406/TNC 306 4 "Bolt hole circle" user cycle example 3/97
4 "Bolt hole circle" user cycle example
The following bolt hole circle program is an example of a user cycle. (This cycle has not been loaded
into the control.)
The Z-axis acts as the tool axis. The first cavity in the circle is at 0°. The cycle calculates the angular
positions of the cavities and of the C axis from the number of cavities. The cavities are approached
in succession in counter-clockwise direction and automatically eroded. Before the cycle is called, the
electrode is held at the safety clearance.
Y
X
Q4
Q3
Q2
0 °
Input parameters:
Q1 = Number of cavities
Q2 = Radius of bolt hole circle
Q3 = X coordinate of center of bolt hole circle
Q4 = Y coordinate of center of bolt hole circle
Q5 = Safety clearance for Z axis
(enter as negative)
Q6 = Cavity depth in Z axis (enter as negative)
"Bolt hole circle" user cycle
0 BEGIN 99999968 MM
1 DLG-CALL 0/1/2/3/4/5/6
Dialog block
2 FN1: Q6 = +Q6 + +Q5 Distance traversed in Z
3 FN4: Q50 = +360 DIV + Q1 Angle increment
4 FN0: Q60 = +0 Starting angle
5 CC X+Q3 Y+Q4 Center of bolt hole circle
6 LBL 11 Jump label
7 LP PR +Q2 PA +Q60 C+Q60 R0 FMAX Approach cavity, position C axis
8 L IZ +Q6 M36 Erode cavity
9 L IZ –Q6 FMAX M37 Retract, generator off
10 FN 1: Q60 = +Q60 + +Q50 Next angle
11 FN12: IF +Q60 LT +360 GOTO LBL 11 Last cavity?
12 END PGM 99999968 MM
Dialogs for "Bolt hole circle" user cycle
Dialog no. DIALOGUE
0 BOLT HOLE CIRCLE
1 NUMBER OF CAVITIES?
2 RADIUS?
3 X COORDINATE CC?
4 Y COORDINATE CC?
5 SAFETY CLEARANCE?
6 TOTAL CAVITY DEPTH?