MICRODRIVE 3 Installation Instructions

Translation of the original installation instructions

Version: V_2024

Brand: DEWERT OKIN

Foreword

Document revision history

Version	Date	Modification, change
1.0	01/2019	Ratings plate, disposal, graphics (installation), technical specifications,
2.0	06/2019	Ratings plate, disposal, graphics (installation), technical specifications,

Disclaimer and exclusion of liability

DewertOkin is not responsible for damage resulting from:

failure to observe these instructions,
changes made to this product which have not been approved by DewertOkin, or
the use of replacement parts which have not been approved or manufactured by DewertOkin.

DewertOkin reserves the right to make unannounced technical changes in the course of its continual product improvement process.

Creation of a complete operating instruction manual for the entire end product

These instructions are intended solely for the end-product manufacturer and should not be provided to the operator of the end product. The factual information contained within may serve as a basis for creating the end-product manual.

Warning and danger notices are best suited for inclusion in the end product's manual. However, it is not sufficient to merely follow these notices; an internal risk assessment for the end product should also be conducted and used as the basis for the safety notices in the manual.

These installation instructions do not contain all information required for the safe operation of the end product. They describe only the installation and operation of the drive as a partially completed machinery.

The instructions are intended for technicians responsible for manufacturing an end product, not for the operators of the end product.

General Information

1.1 Configurations

The MICRODRIVE 3 drive is available in several different configurations. The term MICRODRIVE 3, as used herein, also encompasses the MICRODRIVE 3 MDZ3, MICRODRIVE 3 MD1-3, and MICRODRIVE 3 MD2-3 configurations.

1.2 About these installation instructions

These installation instructions must be followed closely to ensure the successful and safe installation of this drive into the end product. These instructions are not an operating manual for the end product. They are designed to help minimize danger and increase the reliability and lifespan of the device.

CAUTION: The notices in these instructions must be followed! Adhering to the guidelines during installation and connection procedures will help to minimize:

the risk of accident and injury, and
damage to the drive system or the end product.

These installation instructions have been written with due care and attention. However, DewertOkin cannot guarantee the completeness and correctness of the data, images, and drawings, nor does it accept liability for the information contained therein, unless required by law.

Availability of this document

As the manufacturer of the end product, you are obligated to comply with the Machinery Directive 2006/42/EC. This directive stipulates that the installation instructions must be kept on file for governmental inspection purposes.

1.3 Safety notices within the installation instruction and the operating instructions for the entire machine

The manufacturer of the end product is permitted to operate the MICRODRIVE 3 drive (itself an incomplete machine) only:

when the end product (for which the MICRODRIVE 3 drive is intended) complies with all protective measures specified in the Machinery Directive 2006/42/EC, and
when the manufacturer expressly declares the compliance of the end product.

The manufacturer of the end product must create a manual for the users of that product. The safety notices in the end-product manual must be based on the end product's risk assessment.

1.4 Conventions used

Notices not related to safety are indicated with a triangle symbol: ▲ [Notice Symbol]

Safety notice explanations

CAUTION: CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE: NOTICE is used to address practices which are not related to personal injury but may result in damage to the product or surroundings.

Safety notices

2.1 Proper and intended usage

The MICRODRIVE 3 drive is intended for installation in an end product. It provides motor adjustment capabilities for movable parts and should be used in conjunction with suitable fitting brackets and mechanics. It is suitable for applications such as beds, chairs, and tables. According to EN 60335-1, Section 19.7, the motor is locked for a maximum of 30 seconds.

CAUTION: Risk of accident. This drive must only be used for the applications described above. Any other use is forbidden. Improper usage can lead to accidents or destruction of the unit. Such non-approved applications will immediately void all guarantee and warranty claims of the end-product manufacturer against the manufacturer.

Improper usage

Ensure that the following notices concerning improper usage are followed and included in your product manual to inform end-product users:

Do not use in environments where combustible or explosive gases or vapours (e.g., anaesthesiology) may be present.
Do not use with pulling or pushing forces that exceed those specified on the ratings plate.
Do not use in applications cleaned by an automated washing system.
Do not use in a moist environment.
Do not use outdoors.

The MICRODRIVE 3 drive may be used by children aged 8 years and older, and by persons with reduced physical, sensory, or mental capabilities, or persons with lack of experience or knowledge, provided they are supervised or instructed regarding the safe use of the device and understand the resulting risks. Do not allow children to play with this device. Cleaning and user maintenance must not be carried out by children without supervision.

Only use spare parts manufactured or approved by DewertOkin, as these parts guarantee a sufficient level of safety.

2.2 Selection and qualification of personnel

Installation of the drive in the end product must only be performed by qualified personnel.

2.3 Ratings plate

The ratings plates shown are examples; specifications for your drive may differ.

Figure 1: Ratings plate examples

Description of typical ratings plate information:

Model name: MICRODRIVE 3 MDZ3, MICRODRIVE 3 MD1-3, MICRODRIVE 3 MD2-3
Input voltage: 24-29V
Current consumption: max. 4.50A
Intermittent operations: Duty Cycle 1min ON / 8min OFF (1 minute on / 8 minutes pause)
Push Force: max. 4000N
Pull Force: max. 1500N
Prod.Date: Week / year
Serial-No.: Serial number
Protection degree: IP20 (Use in dry rooms only!)
Protection class: III (Safety extra low voltage)
Disposal: Follow all special disposal instructions!
Conformity: CE Mark of CE conformity
Certifications: Recognized Component, ETL Listed (Conforms to UL 962, Cert. to CSA Std. C22.2 No.68)

Description

The MICRODRIVE 3 drive is an electrically driven motor responsible for moving the end product in a linear direction. This movement is achieved by the extension and retraction of a stroke pipe. The MICRODRIVE 3 drive is controlled using an Okin handset.

Technical specifications for the variants are detailed in Chapter 4 "Technical Specifications". The variants differ in:

Working performance,
Speed,
Pushing and pulling forces,
Dimensions and stroke,
Clevises (stroke pipe, gear),
Mount for the stroke pipe (refer to section 3.1.2),
Connection variants (refer to section 3.1.3).

3.1 Components

Figure 2: Main components of the drive MICRODRIVE 3

A: Head of stroke pipe - The end of the stroke pipe, often with a connection point.
B: Electrical connection - Port for power and control cables.
C: Motor - The electric motor unit.
D: Gear clevis - The mechanical interface connecting the drive to the end product, often involving a gear mechanism.
E: Guidance profile - The main body or housing of the drive, containing the internal mechanism.

3.1.1 Stroke pipe head variants

Figure 3: Variants of the stroke pipe head on the MICRODRIVE 3

A: Stroke pipe head with slot / with hole
B: Stroke pipe head without slot / with hole
C: Stroke pipe head (metal)
D: Stroke pipe with reduced end
E: Stroke pipe head with hole
F: Stroke pipe with hole (optional distance bushing)
G: Stroke pipe head with slot / with hole (metal)

3.1.2 Attachment of the stroke pipe

There are two types of stroke pipe attachments for different applications: screwed onto the spindle screw or mounted unattached. The drive exerts only pushing force when the stroke pipe is mounted loosely (unattached). The motions for these two versions are illustrated below.

If the stroke pipe is unattached, the end product can be designed to prevent the stroke pipe from coming out during operation by implementing a fixed end-stop mechanism (refer to "Safety notices to observe during installation" in the "Installation" chapter).

Figure 4: Loose fastening nut (stroke pipe not secured): only pushing forces. This diagram shows the drive with red arrows indicating "Drive motion" along the stroke pipe, demonstrating pushing force.

Figure 5: Stroke pipe screwed onto the spindle screw (attached): both pushing and pulling forces. This diagram shows the drive with red arrows indicating "Drive motion" along the stroke pipe, demonstrating both pushing and pulling forces.

3.1.3 Connection options

The MICRODRIVE 3 drive offers different power supply and connection options:

LS plug
5-pin plug
3-Pol-Stecker (3-pin plug)
Motor control cable

Figure 6: The connector plug and cable versions for the different MICRODRIVE 3 drive types

A: LS plug for the MICRODRIVE 3 MDZ3
B: 5-pin plug for the MICRODRIVE 3 MDZ3
C: 3-pin plug for the MICRODRIVE 3 MDZ3
D: Motor control cable for the MICRODRIVE 3 MD1-3, with connections: D₁: Handset connection, D₂: Power supply connection
E: Motor control cable for the MICRODRIVE 3 MD2-3, with connections: E₁: Handset connection, E₂: Power supply connection, E₃: Connection for an additional slave drive

Technical specifications

Parameter	Specification
Input voltage	24 V DC - 29 V DC
Current consumption at rated load	Max. 4.50 A, depending on version (refer to the ratings plate on the drive)
Permitted push force	Max. 4000 N, depending on version (refer to the ratings plate on the drive)
Permitted pull force	Max. 1500 N, depending on version (refer to the ratings plate on the drive)
Mode of operation¹) under max. rated load	Intermittent duty 1 min ON / 8 min OFF
Protection class²)	III
Noise level	≤ 65 dB(A)
Drive type	Single drive
Load type	Push / pull
Adjustment speed³)	Up to 30 mm/second, depending on the version
Protection degree	IP20
Stroke	< 400 mm
Colour	Black
Dimensions and weight (Length x width x height)	Min. 129 mm x 148 mm x 51 mm
Weight	Approx. 1.5 kg, depending on version
Transport / storage temperature	From -20 °C to +50 °C (From -4 °F to +122 °F)
Operating temperature	From +10 °C to +40 °C (From +50 °F to +104 °F)
Relative humidity	From 30% to 75%
Air pressure	From 800 hPa to 1060 hPa
Height	< 2000 m

¹) Mode of operation: intermittent duty 1 min./ 8 min. This means that after the unit is operated with its rated load for up to one minute, it must then be paused for 8 minutes. The system can malfunction if this pause is not observed!

²) Safety extra low voltage

³) Adjustment speed: the speed at which the clevis can move under no load (the speed varies depending on the load).

Dimensions Diagrams

Figure 7: Dimensions of the MICRODRIVE 3 drive, stroke pipe head with slot / with hole (in mm). Shows a diagram with minimum dimension: 126 mm, main body length: 148 mm, width: 51 mm.

Figure 8: Dimensions of the MICRODRIVE 3 drive, stroke pipe head without slot / with hole (in mm). Shows a diagram with minimum installation dimension: 110 mm, main body length: 148 mm, width: 51 mm.

Figure 9: Dimensions of the MICRODRIVE 3 drive, metal stroke pipe head (in mm). Shows a diagram with minimum installation dimension: 110 mm, main body length: 148 mm, width: 51 mm.

Figure 10: Dimensions of the MICRODRIVE 3 drive, stroke pipe with reduced end (in mm). Shows a diagram with minimum installation dimension: 126.5 mm, main body length: 148 mm, width: 51 mm.

Figure 11: Dimensions of the MICRODRIVE 3 drive, stroke pipe head with hole (in mm). Shows a diagram with minimum installation dimension: 109 mm, main body length: 148 mm, width: 51 mm.

Figure 12: Dimensions of the MICRODRIVE 3 drive, stroke pipe head with hole (optional distance bushing) (in mm). Shows a diagram with minimum installation dimension: 109 mm, main body length: 148 mm, width: 51 mm.

Figure 13: Dimensions of the MICRODRIVE 3 drive, metal stroke pipe head with slot / with hole (in mm). Shows a diagram with minimum dimension: 115 mm, main body length: 148 mm, width: 51 mm.

Installation

5.1 Safety notices to observe during installation

Basic safety rules must be followed to ensure the end product can be continually operated safely. The following rules must be observed while using the end product and installing the drive.

Avoiding fatigue fractures

Install the drive in the end product so that it is properly aligned. This helps prevent shear stress.
Do not position the drive at a slanted angle when installing it in the end product. A slanted angle between the intended direction of movement of the end product and the drive's direction will create shear stress and could lead to a fatigue fracture.
Ensure the drive is installed so that it can always move freely in all operative states.
Never screw the stroke pipe into the drive.

Avoiding an overrun of the stop point with the end product

Your end product should incorporate mechanical end stops. These limit the drive movement and significantly increase operational safety. DewertOkin recommends building such mechanical end stops into your end product.

Ensure your operating instructions inform the user of these safety points.

5.2 Installation procedure

NOTICE: Carry out the assembly of the drive when the application is in a no-load position. In its final position, the drive must be either fully retracted or extended. Damage to the drive is prevented only when in a no-load position and a safe assembly is ensured.

5.2.1 An installation example

Figure 14: Installing the drive (example). This diagram shows the components involved in installation:

A: Safety clip
B: Bracket for securing the drive (on the stroke pipe side)
C: Head of stroke pipe
D: Mounting bolt
E: Gear clevis
F: Bracket for securing the drive (on the motor side)

The following example illustrates the installation of the MICRODRIVE 3 drive into the end product using the mounting bolt. Certain details may change due to technical updates.

Steps for installing the gear clevis (example):

Option 1 & Option 2:

Move your product into a position where it is supporting no load.
Push the drive's gear clevis (E) onto the bracket (F).
Insert the mounting bolt (D) into the bracket (F).
Secure the mounting bolt (D) with the safety clip (A).

NOTICE: Never screw the stroke pipe into the drive. A stroke pipe screwed into the drive can result in fatigue fractures.

If the stroke pipe clevis (C) does not align exactly with the gear clevis (E), the stroke pipe may be unscrewed out of the drive by no more than a half turn.

NOTICE: The stroke pipe may only be turned one half rotation out of the drive. Do not rotate the stroke pipe further out. An over-rotation can lead to unsafe operations.

Steps for installing the stroke pipe (example):

Attach the stroke pipe (C) using a mounting bolt (D) to the fitting (B).
Secure the mounting bolt (D) with the safety clip (A).
You may now connect the drive's electrical connection (refer to section 5.2.2).

5.2.2 Electrical connection

CAUTION: Danger of pinching/crushing injuries! The electrical components may be connected or disconnected only when the mains power and the battery plug (when present) are disconnected. This ensures that uncontrolled movements cannot be triggered.

If the hand switch is used to control two drives, first connect both drives electrically to each other (e.g., via a control unit or double drive), then connect the handset.

Routing the electrical cables

When routing the cables, ensure that:

the cables cannot get jammed,
no mechanical load (such as pulling, pushing, or bending) is put on the cables,
the cables cannot be damaged in any way.

Fasten all cables (especially the mains cable) to the end product using sufficient strain relief and kink prevention methods. Ensure the end product's design prevents the mains cable from coming into contact with the floor during transport.

5.2.3 Dismantling

Ensure work on the drive is carried out in a position where no loads are bearing on it. This is the only way to avoid risks of crushing or injury.

Move your product into a position where it is supporting no load.
If multiple drives are connected electrically, they should be disconnected from each other.
Remove the security clips and the mounting bolt.

Notes on operation

Power-on time / intermittent operations

NOTICE: The MICRODRIVE 3 drive is designed for intermittent operations. Intermittent operation is a mode where the drive must pause after a specified maximum period of operation (power-on time). The drive can overheat if these pauses are not maintained.

The MICRODRIVE 3 drive must operate with an intermittent duty of 1 min. ON / 8 min. OFF. This means that after the unit is operated with its rated load for up to one minute, it must then be paused for 8 minutes.

Shutting off the drive

To shut off the drive, unplug the mains power plug and the battery plug (when present)! The power plug must always be accessible during operations for emergency shut-off.

Avoiding cable damage

Ensure your operating instructions inform the user about possible cable risks.

NOTICE: The cables (particularly the electrical connection for the drive and the power supply cable for the drive system) must not be squashed or crushed. To prevent damage to the drive, no mechanical strain should be placed on the cables.

Maintenance and cleaning

7.1 Maintenance

The MICRODRIVE 3 drive does not require maintenance.

7.2 Cleaning

Clean the MICRODRIVE 3 drive as needed using a dry, antistatic cloth.

NOTICE:

Always disconnect the mains power plug from the drive system (and the battery plug if present) before cleaning the unit!
Never clean the drive in an automated washing system or with a high-pressure cleaner. Do not allow fluids to penetrate the drive, as this could result in system damage.
Do not use a cleanser containing benzene, alcohol, or similar solvents.
Ensure that you do not damage the drive's connecting cable.

Disposal

8.1 Packaging material

Packaging material should be sorted into recyclable components and disposed of in accordance with appropriate national environmental regulations (in Germany, according to the recycling law KrWG from 01.06.2012; internationally, according to EU Directive 2008/98/EC (Waste Framework Directive WFD as of 12.12.2008)).

8.2 Drive components

The MICRODRIVE 3 drive consists of electronic components, cables, and metal and plastic parts. Observe all corresponding national and regional environmental regulations when disposing of the MICRODRIVE 3 drive.

The disposal of the product is regulated in Germany by Elektro-G, internationally by the EU Directive 2012/19/EC (WEEE), or by any applicable national laws and regulations.

The MICRODRIVE 3 drive should not be disposed of with normal household waste! 🚮 [Waste Symbol]

Declarations

Declaration of Incorporation

According to Appendix II of the EU Machinery Directive 2006/42/EC

The manufacturer:

DewertOkin GmbH
Weststraße 1
32278 Kirchlengern
Deutschland - Germany

declares that the incomplete machines described below:

MICRODRIVE 3 MDZ3
MICRODRIVE 3 MD1-3
MICRODRIVE 3 MD2-3

complies with the following basic requirements of the Machinery Directive (2006/42/EC):

Sections: 1.1.3; 1.3.3; 1.3.4; 1.3.7; 1.5.1; 1.5.2; 1.5.5; 1.5.6; 1.5.7; 1.5.8; 1.5.9; 1.5.10; 1.5.13

You may only operate this incomplete machine after you have confirmed that the end product (into which this machine will be installed) complies with the Machinery Directive 2006/42/EC.

On reasonable request, the manufacturer is obliged to send the special documentation accompanying the partially completed machinery in electronic form to the appropriate national institution. The special technical documents corresponding to the machine have been created according to Appendix VII, part B.

For preparation of the technical documentation is authorized:

DewertOkin GmbH
Weststraße 1
32278 Kirchlengern
Tel.: 05223 979-0
Deutschland - Germany

Kirchlengern, Germany 25 November 2019

Dr.-Ing. Josef G. Groß
Geschäftsführer / Managing Director

EU Declaration of Conformity

In compliance with Appendix IV of the EMC-Directive 2014/30/EU

In compliance with Appendix IV of the LVD-Directive 2014/35/EU

In compliance with Appendix VI of the EU RoHS Directive 2011/65/EU (incl. Commission delegated Directive (EU) 2015/863)