Festo ELGT-BS User manual

ELGT-BS
Spindle axis
Festo SE & Co. KG
Ruiter Straße 82
73734 Esslingen
Deutschland
[phone]
www.festo.com
8140435
2021-04
[8140437]
Translation of the original instructions
© 2021 all rights reserved to Festo SE & Co. KG
1Applicable Documents
All available documents for the product è www.festo.com/sp.
2 Safety
2.1 Safety instructions
–Observe labelling on the product.
–Prior to assembly, installation and maintenance work: Switch off power supply,
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 environ-
ment. Ensure that storage times are kept to a minimum.
–Observe tightening torques. Unless otherwise specified, the tolerance
is ± 20 %.
2.2 Intended use
The axis is intended to be used for positioning payloads in combination with tools
or as a drive when external guides are used.
The axis is only approved for slide operation.
Fig. 1: Slide operation
2.3 Training of qualified personnel
Work on the product may only be carried out by qualified personnel who can
evaluate the work and detect dangers.
The qualified personnel have knowledge and experience in dealing with electric
drive systems.
3 Additional information
–Contact the regional Festo contact if you have technical problems
è www.festo.com.
–Accessories and spare parts è www.festo.com/catalogue.
4 Product overview
4.1 Function
The axis converts the rotary motion of the mounted motor into a linear motion of
the slide. The screw drive converts the torque of the motor into a feed force. The
linear movement of the slide is precisely guided by the guide. Sensors enable the
monitoring of end positions, reference position and intermediate position.
4.2 Product design
Product design ELGT-BS
1
2
34 5 6 7 8 9 10
11
12
13
14
Fig. 2: Product design ELGT-BS
1Drive hub
2Threaded hole for motor
mounting kit
3Drive cover
4Guide rail
5Cover
6Lubrication point with ball screw
drive
7Guide lubrication point
8Centring hole for attachment
component
9Threaded hole for attachment
component
10 End cap
11 Slot for sensors
12 Slot for profile mounting
13 Slot for slot nut, threaded and
centring hole
14 Profile
5 Transport and storage
NOTICE
Unexpected and unbraked movement of components
• Secure moving components for transport.
Transport and storage conditions
–Take product weight into account è Technical data.
Weight > 25 kg: transport with a suitable hoist (cross-brace) or with two per-
sons.
–Take the product centre of gravity into consideration.
–Comply with maximum permitted support clearances when attaching transpor-
tation aids è Technical data.
–Store and transport the product in its original packaging.
–Store product in a cool and dry environment protected from sunlight and corro-
sion.
–Store product in areas where it is not exposed to oils, greases and degreasing
vapours.
–Keep storage times short.
6 Assembly
6.1 Safety
WARNING
Risk of Injury due to Unexpected Movement of Components
For vertical or slanted mounting position: when power is off, moving parts can
travel or fall uncontrolled into the lower end position.
•Bring moving parts of the product into a safe end position or secure them
against falling.
6.2 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.
Comply with maximum permitted support clearances when attaching trans-
portation aids è 12.2 Characteristic curves.
4. Dispose of packaging and transport materials.
6.3 Mounting the motor
Axial kit Parallel kit
Tab. 1: Motor mounting
Only loosen screws or threaded pins that are described in the directions in the
instruction manual.
1. Select the motor and motor mounting kit from
Festoè www.festo.com/catalogue.
When using other motors: observe the critical limits for forces, torques and
velocities.
2. Fasten motor mounting kit, observe instructions è www.festo.com/sp.

3. Fasten the motor without tension. Support large and heavy motors.
Connect motor cables only on completion of mounting.
6.4 Fasten axis
Requirement
–No collision in the movement space of the attachment component with motor,
mounting and sensor components.
–Sufficient space to reach maintenance interfaces.
–Flatness of the mounting surface of 0.05% of the stroke length or max. 0.5 mm
over the stroke length of the bearing surface.
–Required support points lie within the specified support distancesè 12.2 Char-
acteristic curves.
–No distortion or bending when installing the product.
1. Select mounting attachments è www.festo.com/catalogue.
2. Place the mounting attachments on the support points.
3. Tighten retaining screws.
Observe max. tightening torque and max. screw-in depth.
In the case of planar and 3-dimensional gantries, pay attention to parallelism,
product height and alignment of the axes.
For additional information, contact your local Festo Service.
Profile mounting EAHF-
L2
Slot nut NST for
mounting slot
Direct mounting
Mounting via profile groove Mounting via profile groove Mounting via thread
Tab. 2: Overview of mounting components
Size 90 120 160
Profile mounting EAHF-L2
Screw Instruction manual è www.festo.com/sp.
Slot nut mounting NST
Screw (bottom) M5 M6
Max. screw-in depth tmax [mm] 6 11.5
Direct mounting
Screw (bottom) M6 M8
Max. tightening torque [Nm] 9.9 15
Max. screw-in depth tmax [mm] 8 7 9
Centring (bore tolerance H7)
Cylindrical pins [mm] Æ5Æ6Æ8
Tab. 3: Information for mounting components
6.5 Mounting the attachment component
Collision-free Flat Centre of gravity
and tilting
moment
Max. screw-in
depth
Tab. 4: Requirement for attachment component
Requirement:
–No collision in the movement space of the attachment component with motor,
mounting and sensor components.
–Flatness of the mounting surface of the attachment component of 0.03 mm
above the slide surface.
–Minimise breakdown torque with force Fx. Short lever arm a from the centre of
the guide

to the centre of gravity of the attachment
–The maximum screw-in depth of the retaining screws is not exceeded.
1. Select accessories è www.festo.com/catalogue.
2. Place centring components in centring holes.
3. Position the attachment component on the slide.
4. Tighten retaining screws.
Observe max. tightening torque and max. screw-in depth.
When using an additional external guide, ensure exact parallelism and alignment
of the axes and guide.
Recommendation: use guide mountings with tolerance compensation.
Direct fastening
Mounting via thread
Tab. 5: Overview of attachment component
Size 90 120 160
Direct fastening
Screw M6 M8
Max. tightening torque [Nm] 9.9 15
Max. screw-in depth tmax [mm] 12 15
Centring (bore tolerance H7)
Cylindrical pins [mm] Æ5Æ6Æ8
Tab. 6: Information on attachment component
6.6 Mounting accessories
Requirement
–No collision in the movement space of the attachment component with motor,
mounting and sensor components.
–Protection against uncontrolled overtravel of the end positions.
–Homing to reference switch or end position.
–Query of end positions or intermediate positions.
–Avoidance of hard impacts at the end positions.
–Prevention of contamination in the slots.
1. Select accessories è www.festo.com/catalogue.
2. Mount the sensor (reference or query):
–Mount sensor in the profile slot.
–Fasten cable.
Instruction manuals è www.festo.com/sp.
Profile groove Profile slot and switch
lug
Sensor bracket and
switch lug
–Mounting via profile groove –Mounting via profile groove
–Switch lug: mounting on slide
When using other sensors
(e.g. Omron EE-SX674):
–Sensor bracket: mounting via
profile groove
–Switch lug: mounting on slide
–Protect the sensor from external magnetic or ferritic influences
(e.g. min. 10 mm distance to slot nuts).
–Preferably use hardware limit switches with normally closed
function (protection guaranteed even in case of sensor failure).
Instruction manual è www.festo.com/sp.
Instruction manual
è www.festo.com/sp.
Tab. 7: Overview of sensor mountings
7 Commissioning
7.1 Safety
WARNING
Risk of injury due to unexpected movement of components.
• Protect the positioning range from unwanted intervention.
• Keep foreign objects out of the positioning range.
•Perform commissioning with low dynamic response.

7.2 Performing commissioning
Block-shaped acceleration profiles (without jerk limitation) can have the following
effects:
• High mechanical loads on the lead screw due to high force peaks.
• Overshooting effects during positioning.
• Rise of the entire system.
Recommendation: reduce high force peaks in the acceleration and deceleration
phases by using the jerk limitation.
When the motor is removed, the motor encoder loses its absolute reference to the
reference mark (e.g. by turning the motor drive shaft).
• Carry out a homing run after every motor mounting in order to establish the
absolute reference between the motor encoder and the reference mark.
Running noises during operation
Identically constructed axes can generate different running noises depending on
the parameterisation, mode of operation, type of mounting, installation environ-
ment and components.
For use with reduced particle emission:
• Clean product è 9.3 Cleaning.
Requirement
–Mounting of the drive system checked.
–Installation and wiring of the motor checked.
–No foreign objects in the movement space of the drive system.
–Max. permissible feed force and drive torque not exceeded as a function of
acceleration, deceleration (e.g. stop function, quick stop), velocity, moving
mass and mounting position.
–No mechanical overload of the axis and dynamic setpoint deviation not
exceeded (e.g. overrunning the end position) due to force and torque peaks
or overshoot effects.
Limit overloads and overruns by jerk limitation, lower acceleration and deceler-
ation setpoints or optimised controller settings.
–Control and referencing movement at reduced velocity, acceleration and decel-
eration setpoints.
–No test drive to mechanical end stops.
–Software end positions do not lie within the effective range of the mechanical
stops.
Steps Purpose Note
1. Check travel Determining the direction of
travel of the slide
–The direction of movement of the slide
for positive and negative position values
depends on the mounting position of the
motor on the axis.
–Set a required reversal of direction of rota-
tion via parameters in the controller or
controller.
2. Homing Determination of the reference
point and adjustment of the
dimensional reference system
–During the initial start-up pro-
cedure
–After replacement of the motor
Permissible reference points:
–towards reference switch.
Travel at reduced velocity è Technical data.
Further information è Instruction manual of
the drive system, è www.festo.com/sp.
3. Test run Checking the operating condi-
tions
Check application requirements:
–Slide travels through the complete travel
cycle in the specified time.
–Slide stops moving when a limit switch is
reached.
After a successful test run, the drive system is ready for operation.
Tab. 8: Commissioning steps
8 Operation
WARNING
Risk of injury due to unexpected movement of components.
• Protect the positioning range from unwanted intervention.
• Keep foreign objects out of the positioning range.
•Perform commissioning with low dynamic response.
9 Maintenance
9.1 Safety
WARNING
Unexpected movement of components.
Injury due to impacts or crushing.
• Before working on the product, switch off the control and secure it to prevent it
from being switched back on accidentally.
9.2 Checking axis elements
Checking reversing backlash
• Check the reversing backlash of the slide at every maintenance interval
(e.g. lubrication interval).
If the max. permissible reversing backlash is exceeded, the axis should be
replaced.
Size 90 120 160
Max. permissible reversing
backlash
[mm] 0.15
Tab. 9: Max. permissible reversing backlash
9.3 Cleaning
–If the guide rail is dirty, clean it with a clean, soft and lint-free cloth without
cleaning agents and then apply the lubricant thinly to the guide rail.
–Clean the other product components with a clean, soft cloth and non-abrasive
cleaning agents.
For use with reduced particle emission:
–Remove abraded particles and dirt from the product:
–Prior to initial commissioning.
–Regularly during operation.
9.4 Lubrication
Lubrication interval and accessories
NOTICE
The lubrication interval Sint is dependent on the load acting on the product.
Load factors include e. g.:
• Dusty and dirty environment
• Nominal stroke > 2000 mm or < 300 mm
•Speed > 2 m/s
• Ambient temperature > +40 °C
• Service age of product > 3 years
• Travel profile matches triangular operation (frequent acceleration and braking)
If one of these factors applies:
•Halve lubrication interval Sint.
If several factors apply at the same time:
• Divide service interval Sint by four.
Lubrication Ball screw drive BS
Recirculating ball bearing guide
Guide rail
Lubrication interval –Calculate the comparative loading factor
fv using the formula for combined loads
è 12.1 Technical data, mechanical.
–Lubrication intervals Sint as a function of the
load comparison factor fv can be taken from
the diagram.
If required, e.g. if
the grease coating is
insufficient.
Accessories è www.festo.com/spareparts
Lubrication point Lubrication nipple Interface
Lubricant Roller bearing grease LUB-KC1Elkalub VP 922
Grease gun Pressure grease gun with pinpoint nozzle LUB-1, 647958
Lubrication adapter, axial outlet, LUB-1-KE,
744167
–
Tab. 10: Overview of lubrication intervals and accessories
Lubricating guide
Ball screw drive BS Recirculating ball bearing guide
Lubrication nipple, one-sided Lubrication nipples, at both ends
Grease quantity per lubricating hole:
ELGT-BS (size), 1 lubrication opening, at side
(rear)
–90: 1.4 g
–120: 1.4 g
–160: 2 g
ELGT-BS (size), 2 lubrication holes, at side
(front and rear)
–90: 1.5 g
–120: 3.5 g
–160: 5 g
Tab. 11: Lubrication overview
1. Inject lubricant into all lubrication holes.
2. During the lubrication process, travel the entire distance in order to distribute
the lubricant evenly inside the machine.
10 Malfunctions

10.1 Fault clearance
WARNING
Unexpected movement of components.
Injury due to impacts or crushing.
• Before working on the product, switch off the control and secure it to prevent it
from being switched back on accidentally.
WARNING
Risk of injury due to unexpected movement of components.
• Protect the positioning range from unwanted intervention.
• Keep foreign objects out of the positioning range.
•Perform commissioning with low dynamic response.
Malfunction Possible cause Remedy
Loud running noises,
vibrations or rough
running of the axis.
Coupling distance too
short.
Observe permissible coupling spacings
è Instruction manual for motor mounting kit,
è www.festo.com/sp.
Torsional stresses –Install axis without tension. Note the flatness
of the contact surface è 6.4 Fasten axis.
–Change the layout of the attachment compo-
nent (e.g. payload).
–Align axes parallel to one another.
Current controller set-
tings.
Optimise controller data (e.g. velocity, accelera-
tion, ...).
Resonance oscillation
of the axis.
Change the travel velocity.
Wear on bearing or
guide.
–Contact local Festo Service.
–Replace axis è www.festo.com/catalogue.
Wear of the ball screw
drive.
–Check reversing backlash è 9.2 Checking axis
elements.
–Contact local Festo Service.
–Replace axis è www.festo.com/catalogue.
Insufficient lubrication
of guide.
Lubricate the guide è 9.4 Lubrication.
Vibrations on the slide. Operation at the reso-
nant frequency of the
axis.
–Change the travel velocity.
–Change the acceleration.
–Increase axis stiffness (e.g. shorter support
distances).
–Change the payload geometry.
Long oscillations of the
profile.
Resonant frequency of
profile and payload too
low.
–Increase axis stiffness (e.g. shorter support
distances).
–Change the payload geometry.
Slide does not move. Coupling slips. Check the mounting of the shaft-hub connection
è Instruction manual for the motor mounting
kit, è www.festo.com/sp.
Loads too high. Reduce forces and torques. Consider dynamics.
Ball screw drive
blocked.
–Contact local Festo Service.
–Replace axis è www.festo.com/catalogue.
Overruns the end posi-
tion.
Sensor does not
switch.
Check sensor, installation and parameterisation.
Idling torque too high. Wear in the drive train. –Contact local Festo Service.
–Replace axis è www.festo.com/catalogue.
Tab. 12: Overview of fault clearance
10.2 Repair
The product can be repaired or maintained.
–Spare parts and accessories è www.festo.com/spareparts.
–Replace with an identical product è www.festo.com/catalogue.
11 Disassembly
WARNING
Unexpected movement of components.
Injury due to impacts or crushing.
• Before working on the product, switch off the control and secure it to prevent it
from being switched back on accidentally.
WARNING
Risk of Injury due to Unexpected Movement of Components
For vertical or slanted mounting position: when power is off, moving parts can
travel or fall uncontrolled into the lower end position.
•Bring moving parts of the product into a safe end position or secure them
against falling.
1. Disconnect electrical installations.
2. Remove the mounted attachment component.
3. Remove the attached accessories.
4. Remove motor and mounting kit.
5. Remove the mounting attachments.
6. Observe transport information è 5 Transport and storage.
12 Technical data
12.1 Technical data, mechanical
Additional information è www.festo.com/catalogue.
Size 90 120 160
Spindle pitch 10P 20P 10P 20P 10P 20P
Design Electromechanical axis with ball screw drive
Guide Recirculating ball bearing guide
Mounting position any
Max. feed force Fx [N] 1054 810 1265 805 1575 1045
Max. no-load drive torque at
vmax
[Nm] 0.3 0.2 0.3 0.4
Max. rotational speed [rpm] 3000
Max. velocity [m/s] 0.5 1 0.5 1 0.5 1
Max. acceleration [m/s2]15
Repetition accuracy [mm] ± 0.02
Reversing backlash [mm] è 9.2 Checking axis elements
Feed constant [mm/rev] 10 20 10 20 10 20
Ambient temperature [°C] 0 … +50
Storage temperature [°C] –20 … +60
Degree of protection IP20
Max. permissible lateral force on the drive shaft
Fr [N] 290
Max. permissible forces and torques on the slide
Fy [N] 4710 6800 9550
Fz [N] 5600 8090 11370
Mx [Nm] 65 300 600
My [Nm] 51 310 560
Mz [Nm] 51 310 560
Calculating the load comparison factor
fv
Tab. 13: General data; ELGT-BS
Size 90 120 160
Spindle pitch 10P 20P 10P 20P 10P 20P
Materials
Note on materials Contains PWIS
Profile
Slide
Cover
Anodised aluminium
Drive cover
End cap
Die-cast aluminium, painted
Guide
Ball bearing
Ball screw
Rolling bearing steel
Screws Steel
Weight
Basic weight at 0 mm stroke [kg] 4.38 4.35 5.25 5.23 9.56 9.6
Added weight per 1000 mm
stroke
[kg] 10.4 10.2 12.4 12.2 18.8 18.9
Tab. 14: Materials and weight
12.2 Characteristic curves
Additional information è www.festo.com/catalogue.
Support spacing ELGT-BS-90/120/160
Maximum permissible support distance L (without central support EAHF) as a
function of force Fy/Fz with a maximum deflection of 0.5 mm.
Support spacing Force load
Tab. 15: Overview of support spacing and force load

Fig. 3: Support distances L as a function of force Fy
ELGT-BS-90
ELGT-BS-120
ELGT-BS-160
Fig. 4: Support distances L as a function of force Fz
ELGT-BS-90
ELGT-BS-120
ELGT-BS-160
Velocity ELGT-BS-90/120/160
Velocity v as a function of the rotational speed n.
Rotational speed n and speed v are stroke-dependent. Observe max. Permissible
rotational speed n as a function of working stroke l.
Fig. 5: Velocity v as a function of the rotational speed n.
ELGT-BS -...- P10 ELGT-BS -...- P20
Max. permissible rotational speed n as a function of working stroke l.
Fig. 6: ELGT-BS-90, rotational speed n as a function of working stroke l
ELGT-BS-90-P10 ELGT-BS-90-P20
Fig. 7: ELGT-BS-120, rotational speed n as a function of working stroke l
ELGT-BS-120-P10 ELGT-BS-120-P20
Fig. 8: ELGT-BS-160, rotational speed n as a function of working stroke l
ELGT-BS-160-P10 ELGT-BS-160-P20