Instructions

reading them now. They are quite simple. Remember that modal g-codes remain in effect

until the control receives a new g-code that over-rides the present code. Modal g-codes

control function, direction or speed and, in general, cannot be used in the same line of

code with other modal g-codes for obvious reasons.

g00 rapid positioning

g01 linear interpolation

g02 circular/helical interpolation (clockwise)

g03 circular/helical interpolation (c-clockwise)

g04 dwell

g10 coordinate system origin setting

g17 xy plane selection

g18 xz plane selection

g19 yz plane selection

g20 inch system selection

g21 millimeter system selection

g40 cancel cutter diameter compensation

g41 start cutter diameter compensation left

g42 start cutter diameter compensation right

g43 start tool length compensation

g49 cancel tool length compensation

g90 absolute distance mode

g91 incremental distance mode

There are no erasers in the machine trades

One other quick thing to note, it should be obvious that I could have provided a disk with

all the examples typed in or to be downloaded, but accurately typing in a program is as

much a part of learning CNC as making chips. When you misspell a word in a letter, the

reader of the letter usually knows what you were trying to say and will not even notice it.

In the world of robots, our robots can self-destruct trying to carry out your foolish typing

error. This kind of typing requires them same precision as machining. There are no

erasers in the machine trades. Only people who express themselves with their mouths and

writings have the use of this marvelous tool. Machinists express themselves with their

work, and that’s the way I like it.

In this exercise the home position is going to be where the tables were located when the

EMC2 was turned on, which is why I had you center the machine slides and is called

x0,y0 and z0. The X-axis is the table that will move to your left when it moves in a

positive direction. The x0, y0 and z0 is also designated in the backplot box with arrows

pointing towards the positive direction away from this position. No more excuses, we’re

going to program that circle I promised you. Note: Although the EMC2 doesn’t need the

“0” after the “g” in g00 or g01 I’ll use them because they are the designations all popular

CNC systems use. Also, I prefer lower case letters because you are less likely to make

errors and mix them with numbers. The capital letter O and the number 0 can be difficult