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'I and J codes'

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I and J codes

• Page 1 (Original Post) •

James Madison from San Clemente Ca. (Contact Member) -

I am writing a program by hand using a code gen program until my mastercam arrives next week.I need some help with I and J codes. I am making a rectangle with radiused corners where r=.5 the dimensions are 3.25 x 1.83 I am starting at g55 as my x0 y0 and running the tool(1") along the top of the rectangle to the left corner where my line of code reads g2x3.75y-.25j-.75 I get a good corner.I then run down to g1x3.75y-1.58 I cant seem to figure out the I-J codes to turn my arc and make the bottom of the rectangle. can any one give me some help? much appreciated!

Comment #1 James Madison from San Clemente Ca. (Contact Member) -

" along the top of the rectangle to the left corner "
I meant to say right corner sorry.

Comment #2 townsend from ohio (Contact Member) -

Why not just use x and y moves and a radius command? Here is how I would write a pass 1 inch deep using a .500 dia. carbide endmill around a block with your dimensions.
O0001
G80 G90 G99 G54
M06 T10 (.500 CARBIDE ENDMILL)
M03 S1000
M08
G00 G90 X0.5 Y2.08
G43 Z.1 H10
G01 Z-1.F1.
G03 X-0.25 Y1.33 R0.75F5.
G01 Y0.5
G03 X0.5 Y-0.25 R0.75
G01 X2.75
G03 X3.5 Y0.5 R0.75
G01 Y1.33
G03 X2.75 Y2.08 R0.75
G01 X0.5
G00 Z0.1
G00 G80 Z.1
M09
G28 G91 Z0
M05
G28 Y0
M30
%

Comment #3 Panhead from Cocoa, Florida (Contact Member) -

i would just enter it in a conversational event as a frame mill

Comment #4 Panhead from Cocoa, Florida (Contact Member) -

see now i know im being stupid duh

Comment #5 Peter (3) from Melbourne Australia (Contact Member) -

Just remember I J K Are the distance from the start point to the centre point.

Comment #6 Hisham (196.219.46.130) -

I need a software who converts DXF or DWG files to CNC programs suitable for Messer Griesheim plasma cutting machine. thanks.

Comment #7 Raghavendra (122.167.97.91) -

1. i want more details about cnc programing.
2. and how could i take i j values( if it semicircle or arc)

Comment #8 Mike in MN (173.16.207.167) -

I explain I and J in my book at cncbasics.com
You can always go to my forum and ask a more specific question about G-Code. www.cncbasicsforum.com
Thanks
Mike in MN
CNC Basics Forum

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