Improper Use; Mounting A Motor Feedback System With Spring Plate Stator Coupling; Requirements For The Qualification Of Personnel; Project Planning - SICK SFS60S Manual De Instrucciones

2.3 Improper use

Double-elastic mounting (to the stator and shaft coupling) of the motor feedback
system is prohibited. The shaft connection between the drive system and the
motor feedback system must have a rigid design.
The motor feedback system cannot support safety functions that are based on
the absolute position, which is transmitted to the RS 485 parameter channel,
without additional measures.
Together with its spring plate stator coupling, the motor feedback system makes
up a spring-mass-system which has its own resonance frequency. If torsion stimu‐
lation is introduced into the system via the motor shaft near this frequency, the
specified limits for vibration resistance can quickly be exceeded; in addition, the
specified accuracy of the position value may also be violated under such loads.
If such stimulations cannot be reliably ruled out in the application, suitable tests
must be carried out for the entire drive system.

2.4 Requirements for the qualification of personnel

The SFS60S/SFM60S safe motor feedback system may be mounted, put into
operation, checked, maintained, or used only by qualified safety personnel.
A qualified person
• has taken part in adequate technical training and
• has been instructed by a machine operator in machine operation and the
applicable safety guidelines and
• can access these operating instructions.
3

Project planning

WARNING
The supply voltage must be generated from PELV systems (EN 50178). The
motor feedback system conforms to protection class III in accordance with EN
61140. If the supply voltage is not generated from PELV systems, the user
must take other measures to ensure safe disconnection for live parts.
4 Mounting
This chapter describes the mounting of the safe motor feedback system.
4.1 Safety
NOTE
Depending on the motor design, it may be necessary to perform the electrical
installation before the mechanical mounting.
NOTE
If the safe motor feedback system has to be removed, the mounting steps are
to be carried out in reverse order.
NOTE
No impacts or shocks are permitted during the mounting of the motor feed‐
back system.
NOTE
The drive unit must be connected to the hollow shaft motor feedback system
using a positive or a positive and non-positive connection.
Using a feather key will prevent the motor feedback system from being
twisted radially. A feather key must be used for drive shafts with a diameter of
8 mm and 3/8".
This ensures that the over-dimensioning required to rule out errors caused by
the loss of the shaft connection.
NOTE
For variants with a spring plate stator coupling, it may not be possible to hold
the torque wrench perpendicular to the screw. An angle of inclination of up to
20° is included in the tightening torque tolerance. Loosening and fixing the
screw at an angle on a regular basis can cause damage to the screw.
WARNING
Note the following safety notes for screws used during mounting:
• Minimum strength class of 8.8
• Select the screw length type according to the mounting conditions
• Secure screw connections from loosening using screw adhesive
• Spring washers and toothed washers are not sufficient for securing
screws!
WARNING
Only use the screws once. After removing the motor feedback system:
Clean the residue off of the affected threads on the drive shaft.
b
Use a new (unused) screw with screw adhesive on the thread during the
b
remounting process.
If the Torx screw (4) is lost, another must be purchased from SICK.
b
8021186/10RG/2018-08-20/de, en, es, fr, it

4.2 Mounting a motor feedback system with spring plate stator coupling

Fig. 1: Mounting a blind/through hollow shaft
Mount on the drive shaft (2) provided by the customer with supplied feather
b
key (1).
Block the customer's drive shaft (2).
b
Apply screw adhesive to the thread of the clamping ring (3) or the supplied
b
Torx screw (4).
Insert the Torx screw (4) in the clamping ring (3) and secure it loosely; do not
b
tighten it at this stage.
Push the motor feedback system onto the customer drive shaft (2), aligning
b
it with the feather key (1). Ensure that you take the distance between the
spring plate stator coupling (5) and the mounting surface (6) into account
when it comes to the length of the screws (4).
Secure the screws (7) and the washers (8) loosely and apply screw adhesive
b
to each thread at the same time.
Fasten the screws (7) until the motor feedback system can be fully pushed
b
on and the spring plate stator coupling (5) is resting against the mounting
surface (6).
Tighten the screws (7). Tightening torque: 1.2 ± 0.1 Nm.
b
Tighten Torx screw (4). Tightening torque: 3.5 ± 0.1 Nm.
b
4.3 Mounting a motor feedback system with spring plate stator coupling, long
SFS60S/SFM60S | SICK 6