Roland Aproll MDX-540, User Manual

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4-3 Starting Cutting (RML-1 Mode)
Determining the Reference Position for Cutting
What Is the Reference Position for Cutting?
Coordinates and Origins
The origin, sometimes called just the "origin," is the starting point for coordinates. It is the location where the X-, Y-, and Z-
axis coordinates are all 0 (zero). The origin plays a major role in performing positioning for cutting. This is because the origin
serves as the reference position for cutting (in other words, it's the starting position for cutting).
You can freely change the location of the origin. This is an extremely useful feature when you're making the preparations for
performing cutting. Adjusting the location where the workpiece (the material being cut) is secured in place is a troublesome
task. Securing the workpiece in place wherever you lime and aligning the origin with that location is much easier.

P. 50 "About the Displayed Tool Position"
Changing the location of the origin to align it with the location of the workpiece in this way is called "setting the origin."
The User Coordinate System and the Machine Coordinate System
The coordinate system in which the location of the origin can freely be changed is called the "user coordinate system."
Meanwhile, there also exists a coordinate system in which the location of the origin is fixed, and cannot be changed. This is
called the "machine coordinate system."
In actual operations, the user coordinate system is used exclusively. You use the machine coordinate system when you want
to know the absolute position of the tool. On this machine, you can display coordinate values using either the user coordinate
system or the machine coordinate system.
The origin for the machine coordinate system on this machine is at the left-side, frontward, and upward limits of the axis
travel.
Origin set to move the
workpiece
Selected coordinate system
This switches only the coordinate view.
Cutting operations are not affected.
Chapter 4 Getting Ready for and Performing Cutting