Festo EMMS-ST-28-L Serie Mode D'emploi page 4

4. Clean the shaft of the motor 1.
The coupling will only grip without slipping on a shaft pin which is dry and free of
grease.
If fat solvent media enters the bearing, it will wash out the service life lubrica-
tion of the bearing.
Note
Encoder and brake can be destroyed.
• Do not exceed the maximum axial shaft load (
5. Place the EMMS-ST on the motor flange 2.
6. Connect the motor to the mechanical components at the threaded holes 3.
Ready to use motor kits for drives can be found in the Festo accessories
( Accessories).
7. Tighten the fastening screws (
5 Commissioning
Note
The actuators connected to the motor can be started unexpectedly when the
holding brake is energised.
• Make sure that the motor is held to a controlled position by the controller
when the holding brake is energised/released.
• Complete the commissioning of the motor in conjunction with the controller in
accordance with the controller manual.
6 Operation
Warning
Hot parts of the housing can cause burning.
• Make sure that people and objects cannot come into direct contact with the
motor.
7 Maintenance and care
Warning
Layers of dust can catch fire.
• Clean the motor housing of dust regularly.
8 Disassembly and repair
Warning
Masses which suddenly slide down may cause injury to people.
• Make sure that the work load on the drive is in a safe position (e.g. in the case
of a vertical drive: in the lower end position).
• You can now remove the EMMS-ST from the mechanical components.
If repairs are required:
• return the motor to Festo.
Repairs by Festo will maintain the safety standards.
• Complete the fitting as follows:
1. Push the slide or the cantilever of the driven mechanical components into a safe
position.
2. Fit the motor kits in accordance with the specifications in the assembly instruc-
tions.
9 Accessories
Note
• Please select the accessories you need from our catalogue
( www.festo.com/catalogue).
Technical Data).
Instructions on drive and motor kits).
10 Troubleshooting
Malfunction Possible cause
Motor shaft does not turn Load too high
Motor shaft does not turn Controller has not yet been
enabled
Holding brake active (only
with EMMS-ST-...-SB/-SEB)
Motor shaft rotates in the Cabling fault
wrong direction
Motor stops at wrong position Stepper fault
Fig. 4
11 Technical data
EMMS-ST-28-L-...
Nominal motor operating voltage
Nominal motor current
Motor holding torque
Step angle with full step
Winding resistance
Winding inductance at 1 kHz
Total moment of inertia of drive
output
Brake operating voltage
Brake power consumption
Brake holding torque
Brake response delay
Brake separation time
Pulses / revolution
Zero pulse
Line driver (RS422 protocol)
Operating voltage of encoder
Radial shaft load:
5 mm distance from flange
20 mm distance from flange
Axial shaft load
Insulation protection class
IP protection (when installed)
Ambient temperature
CE mark (see declaration of conformity)
Relative air humidity
(non-condensing)
Max. cable length
Product weight
1) Measures may need to be implemented in residential areas for interference suppression
Fig. 5
12 Characteristic curves
Rated voltage 48 V
24 V DC
48 V DC
Fig. 6
Remedy
Reduce motor load
Check controller signals
Release holding brake
Check cabling
Repeat reference run
S SE SB
[V] 48
[A] 1.4
[Nm] 0.09
[°] 1.8 ± 5 %
[Ω] 2.3 ± 15 %
[mH] 1.4 ± 20 %
2
[kgcm ] 0.018 0.025
[V] – 24
[W] – 8
[Nm] – 0.2
[ms] – 6
[ms] – 10
– 500 –
– Yes –
– Yes –
[V] – 5 –
[N] 58
[N] 20
[N] 7
B (130 °C)
IP65
[°C] –10 ... +50
1)
To EU EMC Directive
[%] 45 ... 80
[m] 15 (see documentation for controller)
[kg] 0.32 0.38
SEB
500
Yes
Yes
5