Festo DMES User manual

en Operating
instructions
8075175
2017-07e
[8075177]
Positioning axis
DMES

DMES
2Festo – DMES – 2017-07e
Original instructions
DMES-EN
Identification of hazards and instructions on how to prevent them:
Danger
Immediate dangers which can lead to death or serious injuries
Warning
Hazards that can cause death or serious injuries
Caution
Hazards that can cause minor injuries
Other symbols:
Note
Material damage or loss of function
Recommendations, tips, references to other documentation
Essential or useful accessories
Information on environmentally sound usage
Text designations:
 Activities that may be carried out in any order
1. Activities that should be carried out in the order stated
– General lists
èResult of an action/References to more detailed information

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Festo – DMES – 2017-07e English 3
English – Positioning axis DMES
Table of contents
1 Operating elements and connections 4.........................................
2 Function 5................................................................
3 Application 5..............................................................
4 Transport and storage 6.....................................................
5 Requirements for product use 6...............................................
6 Installation 7..............................................................
6.1 Mechanical installation 7.....................................................
6.2 Installation of the payload 9..................................................
6.3 Installing the external accessories 11............................................
7 Commissioning 12...........................................................
8 Operation 14...............................................................
9 Maintenance and care 15.....................................................
10 Repair 16..................................................................
11 Accessories 16..............................................................
12 Troubleshooting 17..........................................................
13 Technical data 17............................................................

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1 Operating elements and connections
For all available product documentation èwww.festo.com/pk
237564
8
9
aJ
1
Fig. 1 aBaC aA
aD
1Drive shaft
2Mounting thread for motor mounting kit
(DMES-25...-63)
3Slide screws
4Slots for mounting the payload
(DMES-25...-63)
5Centring recesses with thread
6Slide
7Guide rail
8Corner profile for central supports
(DMES-18, -25)
9Mounting thread for switch lug
aJ Motor mounting kit (è11 Accessories)
aA Slot for proximity sensor
aB Lubricating nipple for roller guide
(DMES-...-KF only)
aC Lubricating hole for spindle nut
aD Cut-out for inserting slot nuts
(DMES-18, -25)

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Festo – DMES – 2017-07e English 5
2 Function
A rotatable lead screw spindle converts a motor's rotation into linear motion, causing the piston to
move backwards and forwards. The outer slide is driven by an axially rigid connection through a slot in
the profile. A cover strip covers the slot in the profile.
Note
The DMES is self-braking: When the input torque is not applied, the slide will be braked.
The slide, however, can move slowly if
– the DMES is mounted vertically,
– there is no holding torque at the drive pin,
– there are vibrations.
Only the complete system (DMES with MTR-DCI) is self-locking: If the input torque is not
applied, the slide will be braked.
3 Application
The intended purpose of the DMES is the slow positioning of
loads with high forces. It is permitted for the slide operating
mode.
Fig. 2 Slide operation
 Please select the motors in our catalogue that are intended to be used in combination with the
DMES èwww.festo.com/catalogue.
Doing this will ensure you are operating two devices that are perfectly co-ordinated with one anoth
er.
 Observe the limit values for forces, torques and speeds (è13 Technical data and 14 Characteristic
curves).
These limit values apply for continuous operation. During intermittent operation with sufficient
cooling phases, the combination of force and speed may assume higher values in the short-term.
However, the individual maximum values for force and speed may not be exceeded at any time.

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4 Transport and storage
 Consider the weight of the product. The DMES weighs up to 85 kg depending on the design.
 The following should be observed with regard to storage:
– Short storage times
– Cool, dry, shaded and corrosion-resistant locations.
5 Requirements for product use
Make sure that the following specifications are observed:
 Compare the limit values specified in these operating instructions with those of your application
(e.g. forces, torques, temperatures, loads, speeds).
Operation of the product in compliance with the relevant safety regulations is contingent on adher
ence to the load limits.
 Take into consideration the ambient conditions at the location of use.
Corrosive elements in the environment (e.g. ozone) reduce the service life of the product.
 Comply with the regulations of the trade associations and the German Technical Control Board
(TÜV) and the VDE or corresponding national conditions.
 Remove transport packaging such as foils (polyethylene) and cardboard. The material
used in the packaging has been specifically chosen for its recyclability (exception: Oil
paper = residual waste).
Warning
Apply power to the drive motor, at first limited to low speeds and torques. This prevents
uncontrolled movements.
 Use the DMES in its original state without undertaking any unauthorised modifications.

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6 Installation
6.1 Mechanical installation
 Do not modify the screws and threaded pins if not directly
requested to do so in these operating instructions.
 Mount the motor onto the axis èAssembly instructions
for the motor mounting kit recommended in the
catalogue.
Fig. 3
 Please note that the IP protection class depends on the mounting position:
– Diagonal or horizontal with cover strip at the top; vertical: IP40
– Diagonal or horizontal with cover strip at the bottom: IP42
Note
Danger of screws being pulled out if the axis is only mounted to the covers.
 Secure the axis to the profile with additional mounting components.
 Use the marked slots when mounting the drive èFig. 4.
DMES-63DMES-25 DMES-40DMES-18
Fig. 4
 Position the product in such a way that its operating elements are accessible (e.g. relubrication
openings).
 Install product without tension or distortions.
 Fasten product to a mounting surface with flatness of 0.05 % of
the stoke length, but max. 0.2 mm.
For gantry applications, attention must also be paid to parallel
alignment or product heights in alignment of the axes.
For additional information, contact your local Festo Service. Fig. 5

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For products with large stroke lengths:
 Use the central supports (è11 Accessories).
The diagrams in the appendix (è14 Characteristic curves) show the deflections that will result
depending on the mounting position, support spacing and payload.
When mounting central supports:
 Place the central supports on the DMES in accordance with
Fig. 6.
For DMES-40/63: If the device is tilted, the slot nuts of the
central supports will slide into the slot at any point on the
profile.
 Tighten the mounting screws evenly.
Fig. 6
DMES-
18, 25
DMES-
40, 63
 Make sure that the central supports are outside the posi
tioning range of the slide.
Fig. 7
For installation in a vertical or inclined position:
Warning
Uncontrolled payload in the event of a power
failure or spindle nut fracture.
Injury due to impacts or pinching.
 Take appropriate safety measures to prevent
damage as a result of spindle nut fracture
(e.g. toothed latches, bolts or an emergency
buffer).
 If the maximum permitted axial play is ex
ceeded, replace the spindle nut and the
spindle if necessary.
Fig. 8
Fig. 9

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6.2 Installation of the payload
 Place the payload in such a way that the break-down torque
resulting from force F (parallel to the axis of motion) and lever
arm “a” remains small.
Fig. 10
aF
Other fastening possibilities:
1. On the slide: With slot nuts NSTL-... in the slots (4in Fig. 1).
NSTL 25 40 63 Legend
L100 166 229
A13 25 30
B 15 20 35
M M5 M5 M8
Tab. 1 Dimensions of slot nuts type NSTL-...
2. On the slide: With centring sleeves/pins (è11 Accessories) on
the centring recesses/threads (5in Fig. 1).
Observe the maximum screw-in depth T and tightening torque
(èTab. 2).
Fig. 11
N
T
Size 18 25 40 63
Screw M5 M6 M6 M6
Max. screw-in depth T [mm] 10 12.5 12.5 20.5
Tightening torque [Nm] 6 10 10 10
Centring hole [mm] Ø5H7 Ø9H7 Ø4G7 Ø9H7 Ø25G7 Ø9H7 Ø25G7
Tab. 2
3. For DMES without a slide:
On the through-holes of the driver (“N” in Fig. 11).

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For payloads with their own guide:
 Adjust the guides of the payload and DMES so that they are exactly parallel.
You will then avoid overloading the guide (wear).
For hard and stiff payloads (steel):
Note
If the aluminium slide is bent against a curved
payload, the service life of the guide will be re
duced.
 Make sure that the mounting surface of the
payload is not bent more than as follows:
– KF: b ≤ 0.01 mm
For load geometries with projection in the longitudinal direction of the slide:
 Make sure that the payload does not strike
against the motor.
Fig. 13
For motor unit MTR-DCI:
 Twist the motor unit if required èAssembly instructions
for the motor mounting kit aJ.
Fig. 14
aJ
Fig. 12
b

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6.3 Installing the external accessories
To protect the end positions against uncontrolled overtravel:
 Check whether proximity sensors are necessary (hardware limit switches).
If proximity sensors are used as limit switches:
 Use proximity sensors with normally-closed function.
These protect a DMES with a fractured proximity sensor cable from overrunning the end position.
If proximity sensors are used as reference switches:
 Use proximity sensors that correspond to the input of the controller being used.
If you are using magnetically-actuated proximity sensors:
 Use the slots èFig. 15.
 Note that the magnet is situated asymmetrically on the
inner slide (on the side facing away from the motor).
 Avoid external influences from magnetic or ferritic parts
in the vicinity of the proximity sensors (minimum dis
tance of 10 mm from the slot nuts).
 For DMES-25: Only place proximity sensors in the lateral
slots. The magnetic field in the lower slot is very weak.
 For DMES-40: Only place the proximity sensors SMT-8
(high response sensitivity) in the lateral slots. The mag
netic field in the upper slots is very strong (danger of
multiple switchings).
Fig. 15
DMES-25
DMES-18
DMES-40 DMES-63
If you are using inductive proximity sensors:
 Use switch lugs, sensor brackets and proximity sensors (è11 Accessories).
 Use hammer-head screws for fastening the sensor
supports in the slot.
The T-head bolts require the cut-out on the cylinder bar
rel as a guide opening. You can bring the hammer-head
screw into the holding position by turning it 90°.
Fig. 16
To avoid contamination:
 Use cover rails (è11 Accessories) as slot covers in all unused slots.

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7 Commissioning
Warning
Moving loads can cause personal injury and
material damage (risk of crushing).
 Make sure that, in the path of the moving
components
– nobody can place his/her hand in the path
of the moving components (e.g. through use
of protective guards)
– there are no foreign objects in the path of
the moving components.
It should not be possible to touch the DMES until
the load has come to a complete standstill.
Fig. 17
Note
Incorrect specification values for the braking ramp in STOP statuses (e.g. EMERGENCY
OFF, Quick Stop) result in an overloading of the linear axis and can destroy it or drastic
ally reduce service life.
 Check the settings for all braking ramps in your controller or the higher-order control
system (deceleration values and jerk).
 Taking the travel speed, moveable load and mounting position into account, make
sure that the delay values (brake delay and delay times) are set in such a way that
the maximum drive torque or feed force of the linear axis used is not exceeded.
 Use the “PositioningDrives” sizing software to design the linear axis
èwww.festo.com.
Note
Block-shaped acceleration profiles (without jolt limitation) cause high peaks in the
motive force that can lead to an overloading of the drive. In addition, positions outside
the permissible range may occur as a result of overswing effects. A jolt-limited accelera
tion specification reduces vibrations in the entire system and has a positive effect on
stress in the mechanical system.
 Check which closed-loop controller settings can be adapted (e.g. jerk limitation,
smoothing of the acceleration profile).

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Festo – DMES – 2017-07e English 13
Check travel Homing Test run
Determining the approach direc
tion of the motor
Comparing the real situation
with the image in the controller
Checking the overall behaviour
Tab. 3 Definitions
1. Start a check travel and limit it to low dynamic response.
In spite of equal control, even motors of the same type sometimes turn in the opposite direction
due to the circuitry. The spindle of the DMES turns in a clockwise direction. When the drive trunnion
is turned clockwise, the slide moves in the direction of the motor.
2. Start homing limited to low dynamic response. Only go as far as the end stop on the motor side.
Providing the permitted impact energy is not exceeded, homing may be made directly against the
mechanical end position.
Maximum impact energy (= ½ load x speed2):
– DMES-18: Max. 0.12 x 10-3 J
– DMES-25: Max. 0.3 x 10-3 J
– DMES-40: Max. 1.0 x 10-3 J
– DMES-63: Max. 3 x 10-3 J
3. Start a test run and limit it to low dynamic response.
4. Check whether the DMES fulfils the following requirements:
– The slide must be able to move through the complete intended positioning cycle.
– The slide must stop as soon as it reaches a limit switch.
5. If the proximity sensors fail to respond, see è12 Troubleshooting and the operating instructions
for the proximity sensors.

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8 Operation
Warning
Moving loads can cause personal injury and
material damage (risk of crushing).
 Make sure that, in the path of the moving
components
– nobody can place his/her hand (e.g.
through a protective guard),
– there are no foreign objects in the
path of the moving components.
It should not be possible to touch the
DMES until the load has come to a com
plete standstill.
Fig. 18
For installation in a vertical or inclined position:
Warning
Injury to people and material damage!
In the event of a spindle nut fracture (e.g. due to wear) inside the DMES, the work load
will slide down.
 Check whether additional external safety measures to protect against spindle nut
fracture are necessary (e.g. toothed latches or movable bolts).
 Replace the spindle nut and if necessary spindle if the permitted axial play is ex
ceeded.
If the motor turns in the wrong direction:
Note
The motor MTR-DCI is rotatable èAssembly
instructions for the motor mounting kit aJ .
The reference position will then be lost.
 Start homing to reference the positioning
cycle anew è7 Commissioning.
Fig. 19
aJ

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9 Maintenance and care
Each time maintenance is carried out:
 Check the reversing play (axial play) of the slide for wear of the spindle nut. Maximum axial play
permitted is:
DMES-18 DMES-25 DMES-40 DMES-63
0.37 mm 0.62 mm 1.0 mm 1.5 mm
If the maximum permitted axial play is exceeded:
Warning
If a worn spindle nut breaks on a vertical or sloping DMES, the work load will fall.
Uncontrolled payloads can cause personal injury and material damage (risk of
crushing).
 Send the DMES to Festo for repairs.
 Make sure that the connection between the driver and
the slide is set free of play and tension.
Fig. 20 shows the critical points.
The backlash-free setting is accomplished using the
slide screws 3in Fig. 1. Fig. 20
Cleaning and maintenance:
 Clean the cover strip and guide rail if required with a soft cloth. Cleaning agents: All non-abrasive
agents.
 Lubricate the cover strip and the guide rail (...-KF) if the
layer of grease is no longer sufficient.
 Use for:
– the cover strip: Lubricating grease
– the guide rail ...-KF: Roller bearing grease
(è11 Accessories). Fig. 21
Lubricating the spindle and spindle nut:
1. Observe the lubricating intervals: Every 35 km.
Reduce the lubricating intervals for traversing distances <50 mm.
2. Take out the blanking screw from the lubricating hole aC
(èFig. 1).
3. Move the slide into the lubricating position on the motor side until the lubricating hole in the spindle
nut is accessible through the housing bore.

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4. Grease the DMES via the lubricating hole (grease gun, lubrication adapter and lubricating grease:
è11 Accessories).
5. Move the slide along the complete positioning path in order to distribute the grease evenly.
Lubrication of the linear roller bearing DMES-...-KF:
The roller bearings do not need to be relubricated under nor
mal operating conditions
(lubricating interval every 5000 km).
 Lubricate the roller bearings, however:
– In a dusty and contaminated environment
– For nominal strokes 50 mm
– If the DMES is 3 years old
 Grease the slide bearings at all lubrication nipples aB.
Roller bearing grease and grease gun with pinpoint nozzle
(è11 Accessories).
 Move the slide the complete travel distance during
lubrication in order to distribute the grease evenly inside.
Fig. 22
DMES-18-KF
DMES-...-KF
aB
aB
10 Repair
 Recommendation: Send the DMES to our repair service.
This will ensure that special attention is given to the necessary fine tuning and testing.
 Information about spare parts and accessories èwww.festo.com/spareparts.
11 Accessories
Note
 Please select the corresponding accessories from our catalogue
èwww.festo.com/catalogue.
Designation Type Part number/manufacturer
Grease gun with needle-pointed nozzle LUB-1 647 9581)
Lubrication adapter, axial output (for spindle nut) LUB-1-TR-I 647 9591)
Lubrication adapter, radial output (for roller guide) LUB-1-TR-L 647 9601)
Lubricating grease LUB-KC1 from Festo1)
Roller bearing grease for DMES-...-KF Rhenus
Norlith
STM 2
Rhenus Lub
GmbH & Co. KG
1) èSpare-parts catalogue at www.festo.com/spareparts
Tab. 4

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12 Troubleshooting
Malfunction Possible cause Remedy
Axial play too large
(“Maintenance and
care”)
Wear – Send the DMES to Festo for repair
Squeaking noises or
vibrations
Distortions – Install the DMES so it is free of tension
(evenness of the bearing surface:
≤0.2 mm)
– Grease the DMES
(è9 Maintenance and care)
– Modify travel speed
Slide does not move Ambient temperature too
low (increased breakaway
torque in initial run due to
increasing viscosity of the
lubricants in the spindle
system)
– Reduce load mass
– Reduce travel speed
– In the case of servo motors, it may be
necessary to allow higher peak current
(èOperating instructions for the motor)
– Adjust ambient temperature
Tab. 5
13 Technical data
Type DMES-18 DMES-25 DMES-40 DMES-63
Design Positioning axis with rotatable spindle
Permissible temperature
range
0 ... +50°C (ambient temperature)
Installation position Any
Degree of protection IP40 or IP42 depending on the mounting position
(è6.1 Mechanical installation)
Evenness of the bearing
surface
≤0.2 mm
Speed Max. 50 mm/s
Feed constant1) 1.5 mm /
revolution
2.5 mm /
revolution
4 mm /
revolution
6 mm /
revolution
Repetition accuracy2) ±0.05 mm ±0.07 mm
Position elasticity3) 1/1700 mm/N 1/2300 mm/N 1/4200 mm/N 1/5600 mm/N
Axial play (new) ≤0.1 mm
Axial play (defective)4) Max. 0.37 mm Max. 0.62 mm Max. 1.0 mm Max. 1.5 mm
1) Nominal value: Varies due to component tolerances.
2) Based on DIN 230 T2.
3) Elastic deformation of the DMES in an axial direction when in a blocked position (automatic locking or blocked drive trunnion); the
value is to be multiplied by the respective load Fx (payload).
4) è9 Maintenance and care

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Type DMES-18 DMES-25 DMES-40 DMES-63
Maximum forces and torques
Feed force and
Input torque
èAppendix, page19 (max. axial forces ...) and
page20 (max. input torques ...)
Max. radial force on
drive shaft
40 N 75 N 250 N 800 N
Variant DMES without slide
Fy= 36 N
Fz= 80 N
Mx= 0.4 Nm
My=2Nm
Mz= 0.7 Nm
Fy= 80 N
Fz= 100 N
Mx= 1.3 Nm
My=4Nm
Mz= 1.6 Nm
Fy= 92 N
Fz= 390 N
Mx= 2.2 Nm
My= 20 Nm
Mz= 4.6 Nm
Fy= 300 N
Fz= 900 N
Mx= 12 Nm
My= 80 Nm
Mz= 22 Nm
Variant DMES-...-KF with roller bearing guide (GA ZGK)
Fy,z = 930 N
Mx=7Nm
My,z = 23 Nm (GK)
=45Nm(GV)
Fy,z = 2600 N (GK)
= 3080 N (GV)
Mx= 45 Nm
My,z = 85 Nm (GK)
= 170 Nm (GV)
Fy,z = 4300 N (GK)
= 7300 N (GV)
Mx= 160 Nm (GK)
= 170 Nm (GV)
My,z = 330 Nm (GK)
= 660 Nm (GV)
Fy,z = 6600 N (GK)
Fy= 13900 N (GV)
Fz= 14050 N (GV)
Mx= 400 Nm (GK)
= 580 Nm (GV)
My,z = 910 Nm (GK)
= 1820 Nm (GV)
Condition for combined
loads
|Mx|
Mxmax
)
|My|
Mymax
)|Mz|
Mzmax
)
|Fy|
Fymax
)|Fz|
Fzmax
v1
Materials Cylinder profile, end cap, slide, piston: Wrought aluminium alloy
Lead screw spindle, ball bearing, cover strip, guide rail KF: Steel
Spindle nut: POM, PTFE
Internal stops: PA
Tab. 6

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14 Characteristic curves
14.1 Fmax, vmax
EN: Maximum axial forces Fmax and speeds vmax
Fmax, vmax F ,v
DMES-25
DMES-18
DMES-40
DMES-63
F [N]
F [N]
Recommended
Permitted
Permitted with low switch-on duration with adequate cooling phases.

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14.2 Mmax, nmax
EN: Max. input torques Mmax and rotational speeds nmax [Rpm]
DMES-40
DMES-25
DMES-63
M [Nm]
DMES-18
n [1/min]
n [1/min] n [1/min]
M [Nm] M [Nm]
Recommended
Permitted:
Permitted with low switch-on duration with adequate cooling phases..
14.3 Deflection
 EN: Reading example for the following diagrams
With a loading of 1000 N and a distance of 700mm be
tween supports the DMES-... will bend 0.45 mm.
Fstat: In the “Fstat” range only static loadings are per
mitted (slide stands still).
f [mm]
l [mm]
Fstat
1000 N