NZL E and NZL Motor System Operation Manual April 2021

1 Introduction Thank you for purchasing the NSK NLZ E / NLZ motor system. This product can be connected to a dental unit (air unit), which is currently in use, to equip it with a brushless electric micromotor with LED light. Please read this Operation Manual carefully before use for operation instructions and maintenance guidelines to increase overall product life span. Keep this Operation Manual in a handy place for future reference.

1-1

Outline

NLZ Motor Systems are available in two models. NLZ Motor Set, which consists of the main unit, the control unit (Endo function not available) and the Motor. NLZ E Motor Set, which consists of the main unit, the control unit (Endo function available) and the Motor.

Optional

1-2

User and Indications for Use

User: Dental professionals Indications for Use: The NLZ Motor System is intended for use by dental professionals in the performance of dental restoration, prophylaxis and endodontic procedures. The NLZ Endo is intended for use by dental professionals in the performance of dental endodontic procedures.

2

Introduction

1-3

Precautions for handling and operation

ŘPlease read these precautions carefully and use only as intended or instructed. ŘSafety instructions are intended to avoid potential hazards that could result in personal injury or damage to the device. Safety instructions are classified as follows in accordance with the seriousness of the risk. Class

Degree of Risk

WARNING

Hazard that could result in serious injury or damage to the device if the safety instructions are not correctly followed.

CAUTION

Hazard that could result in light or moderate injury or damage to the device if the safety instructions are not correctly followed.

NOTICE

General product specification information highlighted to avoid product malfunction and performance reduction. WARNING

ŘDo not disassemble, adjust or alter the motor or handpiece except as recommended by NSK in this Operation Manual. ŘDo not handle the AC power cord or any other components of this system with wet hands. Touching electrical devices with wet hands may result in electric shock. ŘAvoid splashing water into or near the control unit. Otherwise it could cause short circuits and lead to fire and/or electric shock. ŘDo not allow any impact on to the product. Do not drop the product. Doing so might cause electric shock or malfunction. ŘDo not operate this product close to patients with cardiac pacemakers. It may affect the function of pacemaker. ŘKeep this product away from explosive substances and flammable materials. Also, do not use this product on or near patients who have been administered flammable anesthesia, such as dinitrogen monoxide. ŘIf the product overheats or smells like burning, immediately turn OFF the power switch, disconnect the power plug (by pulling the plug, not the cable) and contact your Authorized NSK Dealer. ŘWhen using of this equipment adjacent to or stacked with other equipment, this equipment and the other equipment should be observed to verify that they are operating normally. ŘConnect the handpiece to the motor, rotate before using to check for motor/handpiece vibration, noise or overheating. If any abnormalities occur, stop using the product immediately and contact your Authorized NSK Dealer. (Refer to "3-11 Check before treatment") ŘShould the product function abnormally during use, stop using the product immediately and contact your Authorized NSK Dealer. ŘIf the product has not been used for a long period, rotate the motor/handpiece and check for noise, vibration or overheating before use. <Motor, Handpiece (Option)> ŘImmediately after a treatment (within 1 hour), perform maintenance and then store the motor and the handpiece. Failure to properly maintain the motor and the handpiece may lead to overheating, causing infection, burn injuries or product failure. Follow maintenance procedures as instructed in this manual and operation manual of the handpiece.

3

Introduction

CAUTION ŘPlace the most priority on patient safety. ŘThe product is designed only for clinical dental use by qualified personnel. This product must not be used for oral surgery, implants or dental laboratory work. ŘThis product may be used only by Dental Professionals, such as Dentists in dental clinics or other medical premises including hospitals. ŘThe product must be used in a dental clinic, hospital or other dental institution. ŘThe user shall be responsible for any judgment that relates to the application of this product to a patient. ŘThe user is responsible for the operational control, maintenance and continual inspection of this product. ŘDo not use the product outside the specified use environment. It may cause malfunction. (Refer to “8-1 Specifications”) ŘOperators and all others in the area must wear eye protection and a mask when operating this handpiece. ŘUse only the AC adapter, AC power cord provided with the product. Never use other AC adapters. Doing so might cause a malfunction. ŘThe AC power cord is the means to cut off commercial power supply. Make sure that the AC power cord can be pulled out from the power outlet without delay in an emergency. Do not place any articles within 15cm of the AC power cord. ŘWhen dirt adheres to the control unit, main unit or AC Adaptor, turn OFF the power, wipe off the dirt with a firmly wrung moist cloth, and then wipe thoroughly with a soft, dry cloth. ŘDo not use the following fluids to wipe, immerse or clean the product; strong / super acid water, strong acid / alkaline chemicals, chlorine-containing solutions, solvents such as benzene or thinner. (Refer to “5. Post-use Maintenance”) ŘPerform regular function and maintenance checks. (Refer to “6-3 Periodical Maintenance Checks”) ŘThis product is rated Medical Electrical equipment. EMC (Electromagnetic compatibility) is described in the documentation included. Installation and use of this product requires special precautions regarding EMC according to the EMC information. (Refer to “10. EMC Information (Electromagnetic Compatibility Information”)) ŘPortable and mobile RF communications equipment can affect Medical Electrical equipment. Do not use RF equipment near the product. ŘUse only authorized components. Use of other components might impair the EMC performance of the product. ŘMake sure that each part is properly connected. Improper connections might cause faulty operation, LED lighting failure and water or air leakage. ŘThe AC power cord included with the product has the length of 2 meters. Bundle and fix the extra cord to prevent the operator or the patient from inadvertently stepping on it. <Control Unit, Main Unit> ŘWhen disconnecting the AC power cord, motor cord or other cords, hold the cords by their plug and pull the plug out. Holding and pulling the cord might snap the wiring in the cord and cause a malfunction. ŘWhen installing the control unit, motor and other components, provide enough room to avoid bending or twisting the tubing or the cord. ŘDo not sterilize the control unit, main unit, AC adapter, AC power cord, motor cord.

4

Introduction

<Motor, Handpiece (Option)> ŘThe output torque changes according to the type of handpiece connected to the motor, operating conditions and other factors. Be sure to use a handpiece made by NSK. (Refer to “4-4 Contra-Check Function”) Use of a handpiece made by a different manufacturer might cause trouble such as disparity between the preset and the output torque. ŘEnsure that the motor has completely stopped rotating before handling. Connecting or disconnecting the handpiece while the motor is rotating may result in injuries or damage the handpiece. ŘDo not point the light illuminated from the motor and handpiece directly into patient's or operator's eyes. Doing so might damage the eyes. ŘThe motor is delivered in a non-sterile condition and must be performed steam sterilization prior to use. ŘDo not lubricate the motor. It may cause overheating and product failure. ŘUse moisture- and dust-free air as the supply air. Mixing in of moisture might cause malfunction or heat generation. ŘConnect only ISO 9168-compliant, Type 2 (Midwest 4 holes), or Type 3 (ISO-compliant standard 4 holes with light) tubing. ŘMake sure to supply coolant air. Otherwise, the motor/handpiece surface might reach a temperature of 51°C or higher.

NOTICE ŘDuring operation, the motor and motor cord may affect computers, LAN cables in the vicinity of use.

Noise could be heard during operation near a radio receiver. ŘUse the "Power Key" to turn ON/OFF the power on a daily basis. If the system is not used for a long

period of time or if the system malfunctions, turn OFF the power of the main unit, disconnect the power cord, and drain water from main unit, tubing and motor cord. ŘFor details on handling the handpiece, refer to the Operation Manual of the handpiece. ŘOnly authorized service personnel should inspect inside the product by following the instructions in

the service manual. Leave the product with your Authorized NSK Dealer, if necessary. ŘNo special training is required to operate this device. ŘDrain water from the main unit, turbing and motor cord, if the main unit is not to be used for a long

time.

5

Introduction

1-4

Classification of Equipment

ŘType of protection against electric shock: - Class ll equipment ŘDegree of protection against electric shock: - Type B applied part:

(Applied parts: Motor, Handpiece)

ŘMethod of sterilization or disinfection recommended by the manufacturer: - Refer to ”5-3 Packaging, Sterilizing, Drying and Storage (Motor)” ŘDegree of protection against ingress of water as detailed in the current edition of IEC 60529: - Control Unit: IPX0 (Not protected) ŘDegree of safety of application in the presence of a flammable anesthetic mixture with air or with oxygen or nitrous oxide: - Equipment NOT suitable for use in the presence of a flammable anesthetic mixture with air or with oxygen or nitrous oxide. ŘMode of operation: - Intermittent operation ( ON:3 min, OFF:10min.)

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2 Components 2-1

List of components

1

2

3

5

6

7

9

10

No.

Part Name

4

8

11

Quantity

Remark

1

Control unit

1

2

Main unit

1

3

Motor

1

4

Motor cord

1

Cord length: 1.8m

5

Purge nozzle

1

For purging excess oil (compatible with ISO 3964-compliant handpieces)

6

AC adapter

1

Cord length: 5m

7

AC power cord

1

Cord length: 2m

The control unit and the main unit are connected via the link cable. -

8

O-ring set

1set

Spare parts For the motor insert joint (Black: 3pcs., Blue: 1 pc.) For the pipes at the rear side of the motor (Black: 5 small pcs.)

9

Mounting bracket

1

For the main unit

10

Mounting screws and nuts

1set

M5x30 screw (2 pcs.), M4x30 screw (2 pcs.), M4 flat head screw (2 pcs.), M5 nut (2 pcs.), M4 nut (2 pcs.)

11

Cable tie

2

For fixing the link cable

7

Components

2-2

Part Names of Control Unit and Main Unit

Power switch

Link cable (cable length: 1m) LCD Display

Motor cord connector

Tubing connector Control panel

AC power cord connector

< Control Unit >

< Main Unit >

8

Components

LCD Display and the Control Panel of the Control Unit < NLZ E > F

G

H

I

E D

A

C

B

8

9

7

10

6

11

5

4

3

2

1

< NLZ > F

G

E D

A

C

B

8 7

10

6

11

5

4

3

9

2

1

Components

No.

1

Key

Name

Power Key

Display

Function

-

Press once to turn ON the power. When the power is ON, hold it down for more than two seconds to turn OFF the power In General Application Mode: Motor speed can be adjusted between 100 and 40,000 min-1.

2

Memory Key

G

In Rotary Endo Mode: Motor speed can be adjusted between 100 and 6,000 min-1. *Display value changes interlocked with the gear ratio. When gear ratio is set by each time pressing this key you can adjust the torque. Rotary Endo Mode Gear Ratio Torque Range (N·cm) Increment (N·cm)

B Torque Key (NLZ E) 3

Setting Key (NLZ)

1:1

0.3 - 3.0

0.1

4:1

0.8 - 6.0

0.4

6:1

1.0 - 6.0

1.0 - 1.2:0.2 1.2 - 6.0:0.6

-

Change the setting as described in “3-10 Changing the settings for various functions”

-

Change the setting as described in “3-10 Changing the settings for various functions” In General Application Mode: Motor speed can be adjusted between 100 and 40,000 min-1.

4

Speed Key

A

5

Check Key

C

Check the status of the handpiece as described in “4-4 Contra-Check Function”

D

Set light intensity (Strong·Moderate·Weak·OFF) By each time pressing this key you can change the volume from OFF -> intensity 1 -> intensity 2 -> intensity 3 and then back to OFF again * The light can be turned on for 5 seconds by pressing the key while the motor is stopped.

6

Light Key

In Rotary Endo Mode: Motor speed can be adjusted between 100 and 6,000 min-1. *Display value changes interlocked with the gear ratio.

10

Components

No.

7

8

9

Key

Name

Volume Key

Gear Key

Auto Rev. Key (NLZ E) *Rotary Endo Mode Only

Display

Function

E

Set the volume of the notifying sound generated when reaching a set torque limit value or when errors occur (High·Low·OFF) By each time pressing this key you can change the volume from OFF -> volume 1 -> volume 2 and then back to OFF again CAUTION When the volume is set to OFF, there will be no alarm sound. Care should be taken when using the system with the volume set to OFF.

F

By each time pressing this key you can switch the gear ratio from 1:5 -> 1:1 -> 4:1 -> 6:1 -> and then back to 1:5 again – in General Application Mode from 1:1 -> 4:1 -> 6:1 -> and then back to 1:1 again – in Rotary Endo Mode By each time pressing this key you can switch the mode between AUTO STOP -> AUTO REVERSE STOP -> AUTO REVERSE FORWARD and then back to AUTO STOP again

H

AUTO STOP

AUTO REVERSE STOP

AUTO REVERSE FORWARD

Toggles between 3 application modes as below Mode Key (NLZ E) 10

11

Setting Mode Key (NLZ)

Rev. Key

General Rotary Endo Application Mode: Mode:

I

Reciprocating Endo Mode:

No display

-

Change the setting as described in “3-10 Changing the settings for various functions”

-

The rotation direction can be changed by this key. The LED lights up during reverse rotation.

11

3 Preparations for Use CAUTION Make sure that each part is properly connected. Improper connections might cause faulty operation, LED lighting failure and water or air leakage.

3-1

1

Installing the Main Unit and the Control Unit

2

Fix the main unit to the dental unit using the screws. As shown below:

Place the control unit on the tray of the dental unit.

M4x30, M5x30 with the nut ( included) M4 flat head screw ( included )

3

Bundle the link cable appropriately and fix it by cable tie.

Cable tie (included)

4

If you wish to install as shown below, optional parts are available for purchase. ( Refer to “ 9-3 Optional Parts List ” )

Installation example using NLZ STAY

Installation example using NLZ MOUNTING PLATE

12

Preparations for Use

CAUTION ŘKeep the main unit away from water. ŘThe control unit incorporates a LCD panel. Place the unit where the operator can see the display. ŘDo not bend the tubing forcibly when putting the main unit in place. Allow some extra space for tubing to avoid pinching or bending it.

3-2

Connecting the Tubing

Align the tubing from the dental unit and the tubing connector at the back of the main unit ( 1 ). Insert it firmly and tighten it completely ( 2 ). IN

ձ

ղ

T

OU

8V

2

AC ER

W

PO

CAUTION ŘBe sure that there is no air or water coming from tubing when attaching it to the main unit. ŘUse moisture- and dust-free air as the supply air. Mixing in of moisture might cause malfunction or heat generation. ŘScrew the nut properly without unnatural force, when you plug in tubing connector and motor cord connector. Avoid cross threading. ŘConnect only ISO 9168-compliant, Type 2 (Midwest 4 holes), or Type 3 (ISO-compliant standard 4 holes with light) tubing. ŘAir requirement: dry, free from contamination and oil. Use a compressor with a dry air system. Install an air filter if necessary. Blow out the lines before installation. ŘDo not pull the tubing using more than necessary force. ŘMake sure to supply coolant air. Otherwise, the motor/handpiece surface might reach a temperature of 51°C or higher.

13

Preparations for Use

3-3

Connecting the Motor Cord

Align the motor cord plug and the motor connector at the back of the main unit ( 1 ). Insert it firmly and tighten it completely ( 2 ).

IN T

OU

ձ

ER

W

PO

ղ

V

28

AC

CAUTION ŘGently screw in the nut of the motor cord plug when tightening it. ŘDo not pull the motor cord using more than necessary force.

3-4

Connecting the AC Adapter

1 Check that main power switch is off. (

the AC adapter plug, with the arrow facing 2 Insert up, into the AC power cord connector at the back

side)

of the main unit firmly. T

OU

AC ER

IN

W PO

T

OU

V

28

AC ER

OW

P

14

Preparations for Use

3-5

Connecting the AC Power Cord

the AC power cord into the inlet of the AC 1 Insert adapter.

the AC power cord plug to commercial 2 Insert power supply outlet.

CAUTION ŘDuring this procedure the power switch of the main unit should remain OFF. ŘThe AC power cord included with the product has the length of 2 meters. Bundle and fix the extra cord to prevent the operator or the patient from inadvertently stepping on it. ŘUse only the AC adapter, AC power cord provided with the product. Never use other AC adapters. Doing so might cause a malfunction. ŘWhen disconnecting the AC power cord, motor cord or other cords, hold the cords by their plug and pull the plug out. Holding and pulling the cord might snap the wiring in the cord and cause a malfunction.

3-6

Connecting / disconnecting the motor and motor Cord

<Connecting> Align and insert the pins of the connector carefully and firmly into the pin holes of the motor, and fasten the motor nut securely. Hole

Pin

Motor

Tighten

Loosen Motor Cord Connector Motor Cord Nut

15

<Disconnecting> Unscrew and detach the motor cord nut, and gently pull out the motor cord.

Preparations for Use

3-7

Using barrier sleeve (motor cord)

Use a disposable barrier sleeve that meets the local regulation for a motor cord, in order to prevent cross contamination between each patient.

A barrier sleeve with a diameter larger than the diameter of the motor (ȭ22mm) is recommended.

CAUTION ŘDispose of sleeves after each patient. ŘRefer to the instruction of the barrier sleeve for detail.

3-8

Using barrier film (control unit)

Use a disposable barrier film that meets the local regulation on the surface where you touch, such as keys of the control unit, in order to prevent cross contamination between each patient.

A barrier film with a width of 5cm or more is recommended.

CAUTION ŘDispose of film after each patient. ŘFor prevention of erroneous operation, do not use such film as decreases the visibility. ŘRefer to the instruction of the barrier film for detail.

16

Preparations for Use

3-9

Connecting / disconnecting the motor and the handpiece (option)

<Connecting> Insert the E-type handpiece into the motor insert, and turn until it clicks as the positioning pin on the handpiece falls into positioning hole on the motor.

that the handpiece is securely connected 2 Confirm to the motor.

1

Handpiece (option)

Motor

<Disconnecting> Simply pull out the handpiece from the motor.

CAUTION ŘEnsure that the motor has completely stopped rotating before handling. Connecting or disconnecting the handpiece while the motor is rotating may result in injuries or damage the handpiece. ŘBe sure to adjust the rotation speed of the motor within the allowable rotation speed of the handpiece (option). ŘLubricated handpiece should stand and allow oil to drain prior to steam sterilization cycle. Attach to the motor after the excess oil has been completely drained. If the oil enters the motor, it may cause malfunction of the motor. ŘAfter lubrication, keep the handpiece standing apart from the motor. Connect the handpiece to the motor when using. ŘDo not allow water to enter the motor. It may cause malfunction of the motor. ŘBefore each use, operate the motor outside the patient's oral cavity. If any abnormality, such as vibration, noise or overheating occurs, stop using the product immediately and contact your Authorized NSK Dealer. (Refer to "311 Check before treatment")

17

Preparations for Use

3-10

Changing the settings for various functions

Settings for various functions can be changed from their default values. This is to make the system easier to use, when it is used for the first time after purchase. You will need to enter into the setup mode, change the settings and save the new ones as below: ON ( I side ) the power switch on the main 1 Turn unit.

2 Press the Power Key on the control unit.

2

down the Mode Key* for more than two 3 Hold seconds. With an alarm sound, "System" and

Blinking

"Setup" on the LCD display will start blinking and the system will enter into the setup mode. * The Setting Mode Key in case of NLZ

3

18

Preparations for Use

the setup mode, the function item can be 4 Inselected using the Speed Key (+/-) ( 1 ), and

a value is changed, the new value will 5 Once blink. Press the Mode Key quickly to save the

the value can be changed using the Torque Key (+/-)* ( 2 ). * The Setting Key (+/-) in case of NLZ

new value. Once saved, this new value will stop blinking.

5

4- 1

4- 2

the settings by pressing the Torque Key 6 Change (+/-). * The Setting Key (+/-) in case of NLZ

6

19

Preparations for Use

<Setting each function item> Display

Function item

Factory Setting

Setting Range

Air pressure for motor startup speed: This is the lower limit of the air pressure at which the motor starts to operate.

0.5bar (0.05MPa)

0.3 – 3.0bar (0.03 - 0.3MPa) (@ 0.1bar increments)

Air pressure for maximum motor speed: This is the upper limit of the air pressure at which the motor will run at its maximum speed. This value can be set only when there is an air supply at a pressure of equal or higher than 1.5bar.

1.8bar (0.18MPa)

1.5 - 3.0bar (0.15 - 0.3MPa) (@ 0.1bar increments)

3 seconds

0 - 10 seconds (@ 1sec. increments)

The notifying sound : This function sets the volume for the operation tone when a key is pressed.

High=2

High=2 Low=1 OFF=0

Contra-Restriction: This function automatically slows down and stops the rotation of the motor when the checking result through Contra-Check is either “OIL” or “NG”. The motor cannot be activated when the checking result is “NG” blinking which shows the status of handpiece defect. (Refer to “4-4 Contra-Check Function” and “4-8 Overheat Prevention”)

ON=1

ON=1 OFF=0

Standard=2

Fast=3 Standard=2 Slow=1 No stop=0

Foot Air Calibration: This function enables you to use the maximum speed 40,000 min-1, even though the air pressure of the dental unit is not high enough, by setting air pressures for “motor startup speed” and “maximum motor speed”.

Delay time for the light: This function sets the delay time for the white illumination lamp going off after the motor stops.

Contra-SAFE: This is a function to stop the rotation of the motor when continuous motor high-load current is detected with a 1:5 increasing handpiece.* In this mode, there are selectable three sensitivity levels: Fast, standard and Slow and the “Fast” setting offers the most sensitive response. (Refer to “4-8 Overheat Prevention”) *Use NSK handpieces : the model of Z95L, Z85L, X95EX, X95L, X95, M95L, M95, X85L, X85 of 1:5 Gear Ratio.

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