Description
3.3 Technical features and system requirements for built-in motors
SIMOTICS M-1FE2 built-in motors
Hardware Installation Manual, 04/2020, A5E50074509B AA
33
Accuracy
The achievable machining accuracy of the motor spindle is influenced by:
● The rigidity of the system (housing, bearings, spindle)
● The smooth running of the motor spindle
● The closed-loop control technology and the encoder resolution
The spindle manufacturer is responsible for the achieved accuracy.
Degree of protection
Note
Degree of protection selection
The spindle manufacturer is responsible for the selection of the degree of protection, its
variant a
nd the proof of suitability.
The motor components must be protected from moisture, foreign bodies and contact.
As delivered, the stator and the rotor have degree of protection IP00 in accordance with
EN 60034-5.
The final degree of protection is defined by the spindle manufacturer as a result of the
mechanical design of the spindle housing.
Recommended degree of protection: IP54 (minimum degree of protection)
Static charging
Danger to life caused by static charging of the rotor
The rotor can be statically charged at higher speeds depending on the mechanical spindle
design as well as the properties of the spindle bearings (e.g. grease and minimum oil
lubrication). This can cause an electric shock if touched.
• If ceramic bearings are used, avoid voltage discharges from the shaft to the sensor
housing caused by grounding the motor shaft.
Closed-loop control
The determining factors of closed-loop control include:
● The number of encoder signals per spindle revolution
● The precision achieved when mounting and adjusting the encoder system
● Multiplication of the encoder signals
● The sampling time of the current and speed controller
To Next Page
Loading...
Need help?
General
