A study of integrated cadcam system with cnc desktop machine
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Date
2018-05
Authors
Nur Aishah Chik
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Abstract
Integration of CAD/CAM has significantly increased the efficiency and performance
of CNC machining. Complex part can be designed quicker and accurately with software
that enables the user to visually see the part and its dimensions using CAD. CAM
packages allow these complex parts to be brought to life by calculating tool path and
writing the code to manufacture the part on a Computer Numerical Controlled (CNC)
machine that called G-code. The CNC Desktop milling machine created to allow the
machining at small level. To improve the limitation and machining process of CNC
Desktop milling machine, the few component are added into the machining controller
that is spindle speed controller that activate the M03 code for spindle on and off and S
code for the speed. The important of CAD/CAM in CNC machining are shown in this
project by creating simulations for machining in FUSION360. The simulations are to
verify the toolpath for machining and generate a G-code that used to control the CNC
machine. An open pocketing modeling were created as the part for the experiment to
verify the importance of the parameter that set in machining focusing on the spindle
speed variation using surface roughness test. From the surface roughness test, the surface
roughness is increased with the decreasing of the spindle speed. A set of parameter for
1200 RPM used as the reference for comparison .The percentage of the improvement on
surface roughness if the maximum spindle speed, 2000RPM used is increase by 8.09%
while when minimum spindle speed used for experiment, 400RPM the surface roughness
increase significantly to 40.42% showed that the higher spindle speed with lower feed
rate provide much better result for surface roughness quality.