Question

7) Identify with circling the errors in the CNC code programming for circular interpolation below. There are total of 5 errors in the code. (5 marks) 100 st NOTE: FACE MILL TO REDUCE THICKNESS BY 1 MM USING 50 DIA SHELL END MILL THICKNESS OF RAW MATERIAL 15 MM ALL DIMENSIONS ARE IN MM Z30 Y75 X100 [BILLET Z0 YO XO [EDGEMOVE D25 [TOOLDEF T1 M39 G28 G91 GO YO XO G28 T1 M06 S1000 M04 Z5 Y20 X-30 G90 GO0 Z-2 F40 G02 X130 Y20 GO Y55 X-30 G01 GO Z5 YO G91 G28 GO M05 M08 M32 NO G/ 70 70

Answer 1

7) Identify with circling the errors in the CNC code programming for circular interpolation below. There are total of 5 errors in the code. (5 marks) 100 st NOTE: FACE MILL TO REDUCE THICKNESS BY 1 MM USING 50 DIA SHELL END MILL THICKNESS OF RAW MATERIAL 15 MM ALL DIMENSIONS ARE IN MM Z30 Y75 X100 [BILLET ZO YO XO [EDGEMOVE D25 [TOOLDEF T1 M39 Z0 G28 G91 GO YO XO G28 T1 M06 S1000 M04 Z5 Y20 G00 X-30 G90 2 F40 3 (G02 X130 Y20 Y55 GO 5 G01 X-30 GO Z5 YO G91 G28 GO ZO M05 M08 M32 NO G/ 70

1) as encircle in the figure the Z30 in billet means the thickness of the material is 30 mm but in the question, it is given that the thickness is 15 mm so it should be Z15

2) for second circle the written is Z-2 but it should be Z-1 as we need to decrease it only by 1 mm

3) for the third circle G02 is used it used for circular interpolation but it should G01 i.e linear interpolation

4) for the fourth circle G0 which is used for rapid positioning is used but instead of that G01 should be used

5) for the fifth circle Y55 is used but it should be Y75 as it is written in absolute programming not incremental programming