Intercon and Lathe Manual discrepency

[tomwiz]

Creating a turning post does not create code as it shows in the manual. Am I missing something ?

turning.jpg (19.89 KiB) Viewed 1235 times

In the manual, it shows that the cutter retracts to the starting x and z positions then moving to the next feed position.
A code snip-it it created : the x position stays at the cut and retracts to the starting z but not the starting x.
N0002 T1100 ;.625 Dia Boring Bar
M7
G97 S1300.0 M3
G4 P3.0
G0 X1.35 Z0.1 T1111
X1.35 Z0.1
G90 X1.352 Z-0.499 G98 F5.0
G0 X1.352 Z0.1
G90 X1.354 Z-0.499
G0 X1.354 Z0.1
G90 X1.356 Z-0.499

[Dave_C]

Unless I am reading the code wrong, the start of the cut is a smaller diameter than the end of the cut in X?

IE: First cut is at X1.35 then the last cut is X1.356 so you have a .006" larger diameter on the last cut.

If you want to start at the outer rim of the part and cut toward the middle, the diamter has to get smaller!

Dave C.

[tomwiz]

That’s right, because it’s a boring operation!

[cnc_smith]

Creating a turning post does not create code as it shows in the manual. Am I missing something ?

The manual is doing an OD turning. The starting X is 3.00 and the ending X is 1.5. When you created your program as Dave C. stated your starting diameter was smaller then the ending diameter so this would be doing an ID cut. With the G90 cycle, on the line that the G90 is you only see the ending X and ending Z in the g-code. Within the G90 cycle itself at the end of the move it will move up the depth of cut for X and move back to the starting Z. Looking at your g-code your depth of cut is only .001 if you are in diameter mode. .001 depth of cut tines 2 equals the difference in diameter for each pass. So looking at a graph it will look like X is not moving up because of your depth of cut unless you Zoom in close.