Festo EMMS-ST User manual

Translation of the original instructions
© 2020 all rights reserved to Festo SE & Co. KG
1 About this document
1.1 Applicable Documents
All available documents for the product èwww.festo.com/sp.
1.2 Product version
This documentation describes the following product versions:
EMMS-ST-...-E/B-G2 Product version
E Encoder, single-turn
B with holding brake
G2 2nd generation (only for EMMS-ST-42/57/87)
Tab. 1 Product version
2 Safety
2.1 Safety instructions
– Observe labelling on the product.
– Prior to assembly, installation and maintenance work: Switch off power sup-
ply, ensure that it is off and secure it against being switched back on.
– Store the product in a cool, dry, UV-protected and corrosion-protected envir-
onment. Ensure that storage times are kept to a minimum.
– Observe tightening torques. Unless otherwise specified, the tolerance
is±20%.
– Electrostatic contact discharges to the motor of more than 3.2kV can cause
sporadic motor malfunctions.
2.2 Intended use
The motor is intended to be used as a component in drive systems and may only
be operated in combination with a suitable servo drive.
2.3 Foreseeable misuse
The holding brake must not be used for braking the motor.
2.4 Training of qualified personnel
Installation, commissioning, maintenance and disassembly should only be con-
ducted by qualified personnel.
The qualified personnel must be familiar with the assembly and installation of
electric drive systems.
2.5 Area of application and approval
In combination with the UL inspection mark on the product, the information in this
section must also be observed in order to comply with the certification conditions
of Underwriters Laboratories Inc. (UL) for USA and Canada.
UL certification information
Product category code PRHZ2 (USA) or PRHZ8 (Canada)
File number E342973
Considered standards UL 1004-1/-6, C22.2 No.100
UL mark
Tab. 2 UL/CSA certification information
3 Additional Information
– Accessories èwww.festo.com/catalogue.
4 Service
Contact your regional Festo contact person if you have technical questions
èwww.festo.com.
5 Product overview
5.1 Function
The product is a stepper motor with 2-phase hybrid technology. The direction of
rotation and step angle are specified by the connected servo drive in the form of a
sinusoidal current injection. The encoder is used to detect the step angle position.
The de-energised holding brake enables the motor shaft to be held at a standstill.
Servo-light operation (closed loop control) is possible in conjunction with the
servo drive CMMT-ST or the motor controllers CMMS-ST or CMMO-ST.
5.2 Product design
1Electrical connection: encoder
2Electrical connection: motor,
holding brake
3Motor shaft
4Motor flange
5Threaded hole for mounting
6Product labelling
7Warning: hot surface
Fig. 1 Product structure EMMS-ST-28 (example EMMS-ST-28 -... EB)
1Motor shaft
2Motor flange
3Threaded hole (42) or through-
hole (57/87) for mounting
4Electrical connection: motor,
holding brake
5Electrical connection: encoder
6Product labelling
7Warning: hot surface
Fig. 2 Product structure EMMS-ST-42/57/87 (example EMMS-ST-57 -... EB)
6 Transport and storage
Transport and storage conditions
– Store and transport the product in its original packaging.
– Store and transport the product in a horizontal position.
– Store product in a cool and dry environment protected from sunlight and cor-
rosion.
– Store the product in ambient conditions without oils, greases and grease-dis-
solving vapours.
– Keep storage times short.
7 Assembly
7.1 Safety
WARNING!
Risk of injury due to unexpected movement of components.
• Bring moving parts of the connected mechanical system into a secure posi-
tion (e.g.move into the lower end position).
The max. permissible axial and radial forces on the motor shaft must not be
exceeded during transport, assembly or operation èwww.festo.com/catalogue.
7.2 Unpacking product
1. Open packaging.
2. Remove all transport materials (e.g.foils, caps, cardboard boxes).
3. Remove the product from the packaging and place it on the mounting surface.
4. Dispose of packaging and transport materials è 13 Disposal.
7.3 Mounting motor
Requirement
– Select accessories èwww.festo.com/catalogue.
1. Degrease and dry the motor shaft.
2. Mount motor on the driven mechanical system.
8146153
EMMS-ST
Stepper motor
8146153
2020-11b
[8146155]
Operating instructions
Festo SE & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
[phone]
www.festo.com

Instruction manual for drive unit, gear unit and mounting kit
èwww.festo.com/sp.
8 Electrical installation
WARNING!
Risk of injury due to electric shock.
• Switch off the power supply during mounting and installation work.
Cancelling the controller enable signal is not sufficient.
Connect lines
Requirement
– Select accessories èwww.festo.com/catalogue.
– Observe permissible cable length and conductor cross section
èwww.festo.com/catalogue.
– Use screened cables.
1. Plug the cables into the appropriate plugs.
2. Connect the cables to the servo drive.
Instructions for servo drive and cable èwww.festo.com/sp.
Plug, M12, 8-pin, A-
coded, socket
Pin Function Description
Servo motor EMMS-ST-28
1 A String A
2 A/ String A/
3 B String B
4 B/ String B/
5 – not connected
6 – not connected
Holding brake EMMS-ST-28 -... B
7 BR+ Holding brake control:
– 24VDC (21.6…26.4VDC): open (ven-
ted)
– 0VDC: closed (retracted)
8 BR– Holding brake, reference potential 0V
– FE Housing for supporting the cable screening
Tab. 3 EMMS-ST-28: plug for motor and holding brake
Plug, Sub-D, 9-pin,
pins
Pin Function Description
Servo motor EMMS-ST-42/57
1 A String A
2 A/ String A/
3 B String B
4 B/ String B/
5 – not connected
6 – not connected
Holding brake EMMS-ST-42/57-...B
7 BR+ Holding brake control:
– 24VDC (21.6…26.4VDC): open (ven-
ted)
– 0VDC: closed (retracted)
8 BR– Holding brake, reference potential 0V
9 – not connected
– FE Housing for supporting the cable screening
Tab. 4 EMMS-ST-42/57: plug for motor and holding brake
Plug, Sub-D, 15-pin,
pins
Pin Function Description
Servo motor EMMS-ST-87
1 A String A
2 A String A
3 A/ String A/
4 A/ String A/
5 B String B
6 B String B
7 B/ String B/
8 B/ String B/
9 – not connected
10 – not connected
Holding brake EMMS-ST-87-...B
11 BR+ Holding brake control:
– 24VDC (21.6…26.4VDC): open (ven-
ted)
– 0VDC: closed (retracted)
12 BR– Reference potential 0V
13 – not connected
Plug, Sub-D, 15-pin,
pins
Pin Function Description
14 – not connected
15 – not connected
– FE Housing for supporting the cable screening
Tab. 5 EMMS-ST-87: plug for motor and holding brake
Plug, M12, 8-pin, A-
coded, pin
Pin Function Description
Incremental encoder, EMMS-ST-...-...E...
1 A
2 /A
A-track signal, RS485-compliant, differential
3 B
4 /B
B-track signal, RS485-compliant, differential
5 GND Reference potential 0V
6 N
7 /N
N-track signal, RS485-compliant, differential
8 VCC Supply voltage 5 V1)
– FE Housing for supporting the cable screening
1) Short circuit proof, max. load 100 mA
Tab. 6 Plug for encoder
9 Commissioning
9.1 Safety
WARNING!
Risk of injury due to unexpected movement of components.
• When releasing the holding brake, secure the driven mechanical system to
prevent unintended movement.
• Deenergise the motor before releasing the holding brake manually.
• Before setting the enable signal, protect the traversing range of the driven
mechanical system from access.
High voltage loss in the motor cable can result in the permissible operating
voltage of the holding brake being undershot.
• Observe permissible cable length and conductor cross section
èwww.festo.com/catalogue.
9.2 Performing commissioning
1. Commission the motor in combination with a suitable servo drive.
Instructions for servo drive èwww.festo.com/sp.
2. Check function and holding torque of the holding brake.
For the grinding-in process of the brake system, briefly close the holding
brake at low speed, e.g.3s at 100rpm.
10 Operation
WARNING!
Danger of burns from hot housing surfaces.
Metallic housing parts can reach high temperatures during operation.
Contact with metal housing parts can cause burn injuries.
• Do not touch metallic housing parts.
• After the power supply is switched off, let the device cool down to room tem-
perature.
• Check the function and holding torque of the holding brake at regular inter-
vals.
If the holding torque is reduced, close the holding brake briefly at low speed,
e.g.3s at 100rpm.
11 Maintenance
11.1 Disassembly
WARNING!
Risk of injury due to electric shock.
• Switch off power supply prior to assembly and installation work; ensure that
it is off and secure it against being switched back on.
Cancelling the enable signal is not sufficient.
WARNING!
Risk of injury due to unexpected movement of components.
• Bring moving parts of the connected mechanical system into a secure posi-
tion (e.g. for vertical installation, move the slide into the lower end position).
• Only then should you disconnect the motor from the mechanical system.
11.2 Cleaning
Before cleaning, the product must be cooled down to below 40°C.
Clean the outside of the product with a soft cloth as required. Cleaning agents
include all non-abrasive media.

12 Malfunctions
12.1 Fault clearance
Repairs may only be carried out by the Festo repair service.
• Motor must not be opened.
Malfunction Possible cause Remedy
Loud rotation noises of
the motor shaft.
Coupling distance too
short.
Observe permissible coupling spacings
èInstruction manual for motor mounting kit,
www.festo.com/sp.
Excessive load. Reduce load.
Servo drive has not yet
been enabled.
Check signals.
Holding brake closed. Release holding brake.
Motor shaft does not
turn.
Min. operating voltage
for opening the holding
brake is not reached.
– Comply with permissible cable length and
cable cross section
èwww.festo.com/catalogue.
– Contact local Festo Service.
Torque of the motor
shaft is not transmitted
to the drive system.
Coupling slips. Check the mounting of the shaft-hub connection
èInstruction manual for the motor mounting
kit, www.festo.com/sp.
Motor shaft vibrates. Current controller set-
tings.
Optimise controller data, e.g.velocity, accelera-
tion, ...
Motor shaft rotates in
the wrong direction.
Cabling error. Check and correct cabling.
Step loss Motor load or accelera-
tion too high.
– Reduce transmitted torque.
– Reduce acceleration values.
Holding torque of the
holding brake is not
reached.
Insufficient condition-
ing of the brake disc.
Briefly close the holding brake several times at
low speed, e.g.3s at 100rpm.
Holding torque of the
holding brake not
effective.
Holding brake fault,
e.g.excessive axial
force on the motor
shaft.
– Replace motor
èwww.festo.com/catalogue.
– Observe max. permissible axial force,
e.g.mount the coupling so it is free of ten-
sion.
Cabling error. Check and correct cabling.Encoder signals not
transmitted. Encoder fault,
e.g.excessive axial
force on the motor
shaft.
– Replace motor
èwww.festo.com/catalogue.
– Observe max. permissible axial force,
e.g.mount the coupling so it is free of ten-
sion.
Tab. 7 Overview of fault clearance
12.2 Repair
Send the product to the Festo repair service for repair.
13 Disposal
ENVIRONMENT!
Dispose of the product and packaging according to the applicable provisions of
environmentally sound recycling.
14 Technical data
Additional information èwww.festo.com/catalogue.
Identifier Description
Motor EMMS-ST -...
UN[V] Nominal operating voltage DC
IN[A] Nominal current
MN[Nm] Nominal torque
nmax [rpm] Maximum mechanically permissible rotational speed
Approval èwww.festo.com/sp
CE mark for the European Union.1)
UL certification mark for the USA and Canada.
RCM certification mark for Australia and New Zealand.
1) EMC Directive: the product is intended for use in industrial environments. Measures for interference sup-
pression may be required in residential areas. The product may generate high frequency malfunctions,
which may require interference suppression measures in residential areas. Additional measures are
required to comply with the EMC Directive for cables > 30m. Compliance with the EMC Directive is the
responsibility of the user.
Tab. 8 Identifiers on the product labelling