A - general reference, Torque requirements for threaded fasteners, Encoder usage – Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) Commissioning - ForGe Control User Manual
Page 123: When is an encoder required, Appendix a, General reference, Appendix
Rockwell Automation Publication 7000-IN012B-EN-P - June 2014
123
Appendix
A
General Reference
Torque Requirements for
Threaded Fasteners
Unless otherwise specified, use the following values of torque in maintaining the
equipment.
Encoder Usage
When is an Encoder Required?
An encoder is required under the following conditions:
1.
When speed regulation accuracy must be between 0.01...0.02% of nominal
speed.
2.
When the zero speed breakaway torque needed is greater than 90% of
continuous running torque.
3.
When continuous running speed is greater than or equal to 0.1 Hz, but less
than 6 Hz.
4.
For minimizing restart times using the flying start capability in forward or
reverse direction.
5.
At any time when high performance torque or speed control mode
(HPTC) is enabled.
Diameter
Pitch
Material
Torque (N•m)
Torque (lb•ft)
M2.5
0.45
Steel
0.43
0.32
M4
0.70
Steel
1.8
1.3
M5
0.80
Steel
3.4
2.5
M6
1.00
Steel
6.0
4.4
M8
1.25
Steel
14
11
M10
1.50
Steel
29
21
M12
1.75
Steel
50
37
M14
2.00
Steel
81
60
1/4”
20
Steel S.A.E. 5
12
9.0
3/8”
16
Steel S.A.E. 2l
27
20