Hello all

an question about milling a hole.
I wil like to mill a round hole of 38 mm with a milling tool of 2.6 mm that go 5 times round the circle  and that the Z access 2mm going down 0.2 mm per 360/circle.
here is my code:

but this code make a circle of 80mm and not 38mm wath's wrong?

(--38mm gat--)
G00 G17 G21 G49 G80 G90
(-- FREES 2.6MM --)
T1 M06
G00 G17 G90 G54 X0 Y0 S8000 M03
G43 H0 Z2 M08
#1 = 1.0  ( Safe Z )
#2 = -0.2 ( Engraving Depth Z )
G00 X17.7 Y40
M98 P1000 L1
G00 Z#1
G00 X17.7 Y-40
M98 P1000 L1
G00 Z#1
G00 Z20
M30
(--CONTOUR--)
O1000
G03 Z#2 F450 I0 J0 
#2=[#2-0.2]
M99

Why not just use one of the wizards to generate the code?

RICH

The wizard create code that is to lang for my DEMO of Mach3.....

Where is the center of the hole?

there are two holes with the same diameter one X0 Y40 and one X0 y-40
and the diameter is 38mm and 2 deep.

G43 H0 Z2 M08
S8000 M3
G0 Z3
G0 X0.0000 Y57.7000 Z0.1250
G1 X0.0000 Y57.7000 Z0.0000 F150
G3 X0.0000 Y57.7000 Z-0.2000 I0.0000 J-17.7000 F450
G3 X0.0000 Y57.7000 Z-0.4000 I0.0000 J-17.7000
G3 X0.0000 Y57.7000 Z-0.6000 I0.0000 J-17.7000
G3 X0.0000 Y57.7000 Z-0.8000 I0.0000 J-17.7000
G3 X0.0000 Y57.7000 Z-1.0000 I0.0000 J-17.7000
G3 X0.0000 Y57.7000 Z-1.2000 I0.0000 J-17.7000
G3 X0.0000 Y57.7000 Z-1.4000 I0.0000 J-17.7000
G3 X0.0000 Y57.7000 Z-1.6000 I0.0000 J-17.7000
G3 X0.0000 Y57.7000 Z-1.8000 I0.0000 J-17.7000
G3 X0.0000 Y57.7000 Z-2.0000 I0.0000 J-17.7000
G3 X0.0000 Y57.7000 Z-2.0000 I0.0000 J-17.7000
G0 X0.0000 Y57.7000 Z3
G0 X0.0000 Y-22.3000 Z3
G1 X0.0000 Y-22.3000 Z0.0000 F150
G3 X0.0000 Y-22.3000 Z-0.2000 I0.0000 J-17.7000 F450
G3 X0.0000 Y-22.3000 Z-0.4000 I0.0000 J-17.7000
G3 X0.0000 Y-22.3000 Z-0.6000 I0.0000 J-17.7000
G3 X0.0000 Y-22.3000 Z-0.8000 I0.0000 J-17.7000
G3 X0.0000 Y-22.3000 Z-1.0000 I0.0000 J-17.7000
G3 X0.0000 Y-22.3000 Z-1.2000 I0.0000 J-17.7000
G3 X0.0000 Y-22.3000 Z-1.4000 I0.0000 J-17.7000
G3 X0.0000 Y-22.3000 Z-1.6000 I0.0000 J-17.7000
G3 X0.0000 Y-22.3000 Z-1.8000 I0.0000 J-17.7000
G3 X0.0000 Y-22.3000 Z-2.0000 I0.0000 J-17.7000
G3 X0.0000 Y-22.3000 Z-2.0000 I0.0000 J-17.7000
G0 X0.0000 Y-22.3000 Z3
M5
M9
M30

IF you are trying to learn Parameteric Gcode I can help you . IF you are just trying to beat the Demo limit then Gerry gave you what you needed.

(;-) TP

Br439 and Gerry thanks for the code it's forking fine but the code is not flexible. What I want is that the "L" gifs the deep in 0.2mm per circle
L10 is 2MM deep etc.

I want to gifs an X and Y value and an radius and the code make the hole.
 

The first thing you need to learn is HOW the I J code works with arcs . It is easiest to work in Abs code until you get to teh circles then switch to INC code  as it is much easier to deal with for circles and IJs.

(;-) TP

(--38mm gat--)
G00 G17 G21 G49 G80 G90 G54 (Safety Block)

(Program the Parameters)
#1 = 1.0  ( Safe Z )
#2 = -0.2 ( Engraving Depth Z )
#3 = [38 - [2.6/2]]
#4 = #2
( Start the Process)

G00  X0 Y0
M03  S8000 M8


G00 Z#1   ( go to safeZ)
G00 X17.7 Y40  ( go to Center of circle)

G91   (Switch to INC)
G00 X#3   ( offset teh X)
G00 Z[-1*#1] ( Move to Z zero)

M98 P1000 L10   ( Call Sub, loop 10 times)
G90  ( Reset To ABS)
G00 Z#1
G00 X17.7 Y40  ( go to Center of circle)
M30

O1000
G1 Z #4 F450
G03 X0 Y0   I [-1*#3] J0  F850
M99
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