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MEC 325/580 Lab Report

CNC Machining Lab Report

Date: March 18, 2013

Group Leader: Jian Wu
Team Members:

Group Number: G4

Regment No.: D



1.Objective and introduction.
2.Principles and practice.
3.Design and result.
4.Conclusion and recommendations.

1. Objective and introduction * Objectives Operate the CNC milling machine using G-codes, M-codes in a CNC program. * Equipment: Minitech CNC machine (Series 2) * Machine introduction Most CNC milling machines are computer controlled vertical mills with the ability to move the spindle vertically along the Z-axis. This extra degree of freedom permits their use in die sinking, engraving applications, and
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Most often it is some combination of the three. The speed at which the piece advances through the cutter is called feed rate, or just feed; it is most often measured in length of material per full revolution of the cutter.
As material passes through the cutting area of a milling machine, the blades of the cutter take swarfs of material at regular intervals. This non-continuous cutting operation means that no surface cut by a milling machine will ever be completely smooth; at a very close level (microscopic for very fine feed rates), it will always contain regular ridges. These ridges are known as revolution marks, because rather than being caused by the individual teeth of the cutter, they are caused by irregularities present in the cutter and milling machine; these irregularities amount to the cutter being at effectively different heights above the work piece at each point in its rotation. The height and occurrence of these ridges can be calculated from the diameter of the cutter and the feed. These revolution ridges create the roughness associated with surface finish. * Procedure 1. Power on and initialization 2. Load the program and simulate the code 3. Set up the origin and do a dry run 4. Run the machining
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