1. Ma-603
Mach 153B John Branlund

2. Learning Objectives:
Learn the use of ‘Loops ’ using the L word in g-code programs.
Practice Incremental Positioning techniques.
Dividing lengths of whole patterns into equal individual lengths.

3. Blueprint:
Holes should be drilled to ¼” diameter.

4. 1st Pattern: 7 holes between X-.75 and X-5.25
4.5 / 6 is the hole spacing in X

5. 2nd Pattern: 8 holes between Y-.75 and Y-3.375
2.625 / 7 is the hole spacing in Y

6. 3rd Pattern: 7 holes between
X-5.25 Y-3.
X-.75 Y-1.5
X spacing is 4.5 / 6 and the Y spacing is 1.5 / 6

7. Writing the frame:
Again, I used the Frame Maker to write the profile toolpath.

8. Writing the 1st Pattern:
Add T2 to your program.
Position to the start of the row.
Drill the first hole.
Add next holes as INC & add L word.

9. 2nd Pattern: Drill 1st hole of the second pattern in ABS.
Add next holes as INC & add L word.

10. 3rd Pattern: Drill 1st hole of the second pattern in ABS.
Add next holes as INC X & Y and add the L word.
Switch back to ABS and end cycle.

11. Conclusions:
Looping is an effective method to create patterns that are equally spaced.
The L word can also be used with subroutines which have been written in incremental positioning.