Danfoss VLT Integrated Servo Drive ISD 510 System, Design Manual

Page: 64 / 86

130BE671.10
Illustration 6.21 Mounting of Size 2, 2.1 Nm Servo Drive
NOTICE
Do not machine the shaft.
Do not use the servo drive if the shaft does not match
the coupling arrangement.
Table 6.10 lists the tightening torque values for the fixing
screws. Always tighten the fixing screws uniformly and
crosswise.
NOTICE
Failure to adhere to the specifications in Table 6.10 may
result in damage to the servo drive.
Servo drive size Thread type/
hole size
Maximum
thread length Tightening
torque
Size 1, 1.5 Nm
∅
5.8 mm – –
Size 2, 2.1 Nm M6 pitch 1 mm 23 mm 6 Nm
Size 2, 2.9 Nm
∅
7 mm – –
Size 2, 3.8 Nm
∅
7 mm – –
Table 6.10 Tightening Torques
NOTICE
The fixing screws are not supplied and must be selected
according to the machine fixings.
6.1.8 Installation
6.1.8.1 Allowed Forces
20
Fa
Fr
130BE662.10
Illustration 6.22 Allowed Forces
Illustration 6.22 shows the maximum allowed forces on the
motor shaft.
The maximum axial and radial load while assembling the
motor and for any mechanical device connected to the
shaft, must not exceed the values shown in
Table 6.11 . The
shaft must be loaded slowly and in a constant manner:
Avoid pulsating loads.
NOTICE
The bearing could be permanently damaged if the
maximum allowed forces are exceeded.
Motor size Radial Force (Fr) in N Axial Force (Fa) in N
Size 1 450 1050
Size 2 900 1700
Table 6.11 Permitted Forces
The maximum radial load ratings are based on the
following assumptions:
•
The servo drives are operated with peak torque
of the longest member of the frame size.
•
Fully reversed load is applied to the end of the
smallest diameter standard mounting shaft
extension.
•
Infinite life with standard 99% reliability.
•
Safety factor = 2
6.1.8.2 Bearing Load Curves
This section shows the bearing load curves (L10h – 10%
failure) for each servo drive variant, which are calculated
based on DIN ISO281. The curves show the maximum
allowed radial force versus the maximum allowed axial
force on the shaft end for different speeds. The estimated
life-span of the bearing with this condition is 20000 h.
Specifications
VLT
®
Integrated Servo Drive ISD
®
510 System
62 Danfoss A/S © 08/2017 All rights reserved. MG36C102
6 6