Milling with the Lab-Volt 5600 02/27/08

Agenda Introduction to g-code Create a design for a 2”x2” piece of milling stock Graph on paper Create the g-code for the paper design

Vocabulary CNC - a computer that reads G-code instructions and drives a milling machine in order to milling a part End mill - a cutting to similar to a drill bit in appearance with cutting edges on its circumference PRZ - programmed reference zero

What’s g-code? A type of Industrial Standard Operation (ISO) codes. We will use their conversational equivalents.

G-CODE DEMO

Coordinate System

Coordinate System (x,y,z) where x axis parallels the front of the cnc mill Y axis parallels the side of the cnc mill Z axis parallels the height of the cnc mill (x,y,z) = (0,0,0) or the Programmed Reference Zero is set before cutting to be a position at the top of the mill stock at its left front corner. This means that to cut the material, the end mill’s z coordinate will need to be negative.

PRZ

ALWAYS Emulate Before Milling!!

Straight Lines FEED 5 SPEED 1500 MOVE X.125 Y.125 Z0.1 RAPID Z-.125 END

In class assignment Using the graph paper provided draw a maze to be milled with an 1/8” end mill. Write the g-code to mill it. Run the simulations in four views.