Experimental Investigation on Geometric Accuracy …
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Fig. 4 Part drawings at different wall angles
Table 2 Process variables and their levels
Variables
Unit
Level (1)
Level (2)
Level (3)
Feed rate
mm/min
2400
3600
–
Pitch
mm
0.3
0.65
1
Number of stages
–
1
2
3
Table 3 Taguchi design matrix
Exp. No.
Feed rate (mm/min)
No. of stages
Pitch size (mm)
1
2400
1
0.3
2
2400
1
0.65
3
2400
1
1
4
2400
2
0.3
5
2400
2
0.65
6
2400
2
1
7
2400
3
0.3
8
2400
3
0.65
9
2400
3
1
10
3600
1
0.3
11
3600
1
0.65
12
3600
1
1
13
3600
2
0.3
14
3600
2
0.65
15
3600
2
1
16
3600
3
0.3
17
3600
3
0.65
18
3600
3
1