Re: [CAD_CAM_EDM_DRO] DIFFERENCE BETWEEN G90 & G91?

Hi Woodknack,

Let's assume you're at coordinate 3.00, 3.00

G90 absolute mode (which is modal) means when you issue a "G01 X1.0
Y2.0", command (block) you will go to the coordinate 1.00, 2.00

G91 incremental mode (also modal) means when you issue the same "G01
X1.0 Y2.0" command, you will move to 4.00, 5.00

So absolute, just go to the specified coordinates. incremental
(relative), adjust your current position by the specified "offsets".

Modal means the "mode" stays in effect until changed by another modal
command of the same group.


Alan KM6VV
P.S. The Gcode section of EMC is a good place to "study up" on the
majority of Gcodes (and Mcodes) encountered by the hobbyist. Also, read
the descriptions of the controller programs you are using or considering
using.


woodknack wrote:

>
> What is the difference between G90 which is absolute mode and G91
> which is incremental mode. Can someone break down what absolute mode
> and incremental mode is. Its probably very simple, Im just very new
> to this.