Table 4 error analysis.

From: Design and development of high precision four roll CNC roll bending machine and automatic control model

Order number

Side roll displacement d (mm)

Forming radius R (mm)

Curve fitting

(mm)

Error (%)

1

43

6638.45

6595.87

0.6

2

47

5751.45

5865.35

1.98

3

52

5189.36

5115.98

1.41

4

55

4874.25

4746.37

2.62

5

57

4412.16

4525.05

2.56

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