HEIDENHAIN TNC 370 - Page 173

7
Programming with Q Parameters
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7.1 Q Parameters Instead of Numerical Values
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Example for exercise: Full circle
Circle center CC: X = 50mm
Y = 50mm
Beginning and end
of circular arc C: X = 50 mm
Y = Omm
Milling depth: Z = -5mm
Tool radius: R = 15mm
Part program without Q parameters
0 BEGIN 360074 MM . . . . . . . . . . . . .._.......................... Start of program
1 BLK FORM 0.1 Z X+0 Y+O Z-20
Blank form definition
2 BLK FORM 0.2 X+1 00 Y+lOO Z+O
3 TOOL DEF 6 L+O R+15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tool definition
4 TOOL CALL 6 Z S500 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tool call
5 CC X+50 Y+50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Coordinates of circle center CC
6 L Z+lOO RO FMAX M6 Insert tool
7 L X+30 Y-20 FMAX . . . . . . . . . . . . . .._.......................... Pre-position tool
8 L Z-5 FMAX M3
9 L X+50 Y+O RR FIOO . . . . . . . . . . .._._..__....................... Move to first contour point with radius compensation
10 C X+50 Y+O DR+ __..........................._._..____________.. Mill circular arc C around circle center CC; coordinates of end
point: X = +50 mm and Y = 0; positive direction of rotation
11 L X+70 Y-20 RO FMAX
12 L Z+lOO FMAX M2
13 END PGM 360074 MM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Retract tool and end program
Part program with Q parameters
0 BEGIN PGM 3600741 MM
1 FN 0: Ql = +I00 Clearance height
2 FN 0: Q2 = +30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Start pos. X
3 FN 0: 03 = -20 . . . . . . . . . . . .._.__................................. Start-End pos. Y
4 FN 0: Q4 = +70 . . . . . . . . . .._..._................................ End pos. X
5 FN 0: Q5 = -5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Milling depth
Blocks 1 to 12:
6 FN 0: Q6 = +50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Center point X
7 FN 0: Q7
Assign numerical values to the
= +50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Center point Y
8
FN 0: Q8 = +50 . . . . . . . . . . . . . ..__.___._....................... Circle starting point X
Q parameters
9 FN 0: 09 = +0 _................................................... Circle starting point Y
10
FN 0: 010 = +0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tool length L
11 FN 0: Ql 1 = +I 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tool radius R
12 FN 0: Q20 = +I 00 . . . . .._.__....__............................. Milling feed rate F
1
13 BLK FORM 0.1 .Z X+0 Y+O Z-20
14
BLK FORM 0.2 X+100 Y+lOO Z+O
15 TOOL DEF 1 L+QlO R+Ql 1
16
TOOL CALL 1 Z S500
17 CC X+06 Y+Q7
Blocks 13 to 24:
18
L Z+Ql RO FMAX M6 Corresponding to blocks 1 to 12
19 L X+Q2 Y+Q3 F MAX from program 360074
20
L Z+Q5 F MAX M3
21 L X+08 Y+Q9 RR FQ20
22 C X+Q8 Y+Q9 DR+
23 L X+Q4 Y+Q3 RO FMAX
24 L Z+Ql FMAX M2
25 END PGM 3600741 MM
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TNC 370 7-5
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