<![CDATA[The value of a product can be indicated by one of them is surface quality. The machining process has different fineness (roughness value), especially in CNC Milling machines. This study aims to determine the variability of tool path, Spindle Speed, and Feed Rate on flat surfaces machined CNC Milliing Sinumerik 808D 3 Axis on Acrylic material, on the surface roughness produced in units (Ra) which results are good. The machining process of acrylic materials using CNC Milling machines is carried out at the Campus CNC Laboratory of the Akprind Institute of Science & Technology in Yogyakarta. Surface roughness testing was carried out at the Engineering Materials Laboratory, Department of Mechanical Engineering, Gadjah Mada University using the Surface SE 1700 roughness test equipment and material surfaces observed using a 200x magnification metal microscope. The machine parameters that are set are the spindle speed of 1000, 1500, 2000 rpm, Feed Rate 400, 800 mm / min and use the zigzag & one way tool path. The conclusion obtained is that at 1000 rpm spindle rotation, one way feed flow, 800 mm / minute feeding speed gets the highest roughness of 15.78 μm. While the spindle rotation of 2000 rpm feeding speed of 400 mm / min, and zig-zag tool flow get the lowest roughness value, the roughness value obtained is 7.074 μm. Then the CNC Milling Machining Process on Acrylic material if you want to have good roughness the parameters must be high rotating speed and low Feedrate using a one way toolpad.]]>
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