KUKA LBR iico Robot Installation and Debugging Technical Guide

KUKA LBR iico Robot Installation and Debugging Technical Guide

Introduction: The Engineering Value of Lightweight Robots

The KUKA LBR iico series is a lightweight industrial robot designed for human-machine collaboration scenarios, covering three models: LBR iico 7 R900, LBR iico 12 R1260, and LBR iico 16 R1000, corresponding to rated loads of 7kg, 12kg, and 16kg, respectively. The maximum working radius ranges from 900mm to 1260mm. This series of robots adopts a 6-axis articulated design, and all drive units and current carrying cables are built into the robot body, with a protection level of IP67, which can adapt to harsh industrial environments.

Unlike traditional industrial robots, LBR iico integrates multiple sensors on each axis - axis range sensors ensure compliant motion range, torque sensors monitor load limits, and temperature sensors protect electronic devices. This "sensor based" design not only supports traditional teaching programming, but also has collaborative capabilities such as impedance control. The Commander interface is located on the wrist and integrates hand guidance buttons, point recording buttons, and two user-defined buttons, supporting direct drag teaching. This article is based on the official assembly manual of KUKA, systematically summarizing the technical points of the entire process from mechanical installation to commissioning and production, helping engineers quickly master the deployment and maintenance of the robot.

Overview and Technical Parameters of Product Series

2.1 Horizontal comparison of three models

Parameter LBR iico 7 R900 LBR iico 12 R1260 LBR iico 16 R1000

Rated/maximum load 7 kg/7.6 kg 12 kg/12.8 kg 16 kg/17.2 kg

Maximum working radius 900 mm 1260 mm 1000 mm

Work envelope volume 3 m ³ 8.1 m ³ 4.1 m ³

The weight of the body is about 26 kg, about 40 kg, and about 39 kg

Position repeatability accuracy ± 0.03 mm ± 0.04 mm ± 0.04 mm

Protection level IP67 IP67 IP67

Controller KR C5 micro-2 KR C5 micro-2 KR C5 micro-2

Cleanroom Class ISO 4 (100% speed) - ISO 5 (100% speed)

2.2 Axis motion data

The motion range of the three models is consistent: A1 ± 185 °, A2-230 °/50 °, A3 ± 150 °, A4 ± 180 °, A5 ± 110 °, A6 ± 220 °. But the speed parameters vary by model: the rated speed of all spindles in the 7 R900 is 180 °/s (A6 reaches 360 °/s), while the A1/A2 speed of the 12 R1260 and 16 R1000 is 120 °/s, A3~A5 are 180 °/s, and A6 is also 360 °/s. This means that the 7kg model has more advantages in dynamic response and is suitable for high-speed assembly scenarios; The 12kg/16kg model focuses on heavy-duty and larger working range.

2.3 Environment and Installation Conditions

The working temperature of the three models is 0~45 ℃, the storage/transportation temperature is -25~60 ℃, and the operating humidity is 20%~80%. The installation method is extremely flexible: it supports ground installation, wall installation, ceiling installation, and installation at any angle (± 180 ° tilt angle). The installation base size is S165 hole type (bolt circle diameter 165mm), and the base occupies an area of approximately 200 × 200mm. It is worth noting that when the robot is not installed on the ground, the tilt angle parameters (A, B, C directions) must be correctly configured through the system software, otherwise it may cause unforeseeable motion or overload.

Mechanical installation and rack installation

3.1 Rack Installation Components

LBR iico adopts the Machine Frame Mounting method to fix the robot on the steel frame, elevated seat, or KUKA linear guide prepared by the customer. The installation kit includes:

4 M8 × 30 ISO4762-12.9 hexagon socket screws (with flat washers)

2 cylindrical positioning pins (ensuring precise alignment)

The installation surface must be pre processed with corresponding positioning holes and threaded holes, and the positioning pin holes are used to ensure precise and repetitive positioning between the robot and the installation surface.

3.2 Installation steps

Clean the installation surface: Remove grease, rust, or adhesives.

Check hole position: Confirm that the hole position on the installation surface matches the hole pattern of the robot base.

Install locating pins: Rotate two cylindrical locating pins into the installation surface and check their firmness.

Lifting robot: Use lifting equipment to move the robot to the installation position and maintain an absolute vertical descent to prevent damage to the positioning pin.

Placed in place: The robot base aligns with the positioning pin and slowly descends until it fully fits.

Insert screws: Install 4 M8 × 30 hexagon socket screws with flat washers.

Diagonal incremental tightening: Use a torque wrench to increase the torque in multiple steps to the specified torque (M8 12.9 grade screw torque is approximately 36 Nm).

3.3 Foundation load verification

The force and torque generated by the robot's motion will be transmitted to the foundation. The manual provides load data for three installation positions (floor/wall/ceiling). Taking the ground installation of LBR iico 16 R1000 as an example:

Normal vertical force F (v normal)=684N, maximum F (v max)=1057N

Horizontal force F (h normal)=278N, maximum F (h max)=624N

Tilt moment M (k normal)=308Nm, maximum M (k max)=684Nm

The installation foundation must be able to permanently withstand these loads. Improper foundation design may lead to structural failure and cause serious safety accidents. The specified installation equipment should be used in the project, and the load should be calculated according to each specific working condition.

Electrical connections and interface definitions

4.1 Overview of Connecting Cables

The robot is connected to the KR C5 micro-2 controller through two sets of cables:

Motor cable: Connect controller XD20.1/XD20.2 → robot X30, transmit motor power and brake power

Data cable: Connect controller XF21 → robot X31, transmit position feedback, torque signals, and temperature data

Grounding conductor: M4 ring terminal connected to the robot base and controller grounding terminal (optional, but recommended for mandatory installation)

The standard length of the cable is 4m, 7m, 15m, with a maximum length of 15m, and extension is not allowed. When fixed installation, the bending radius of motor cables should not be less than 120mm, and that of data cables should not be less than 60mm. The cables must be laid separately in metal cable trays to avoid EMC interference.

4.2 Wrist external interfaces X1 and X2

The robot wrist Commander is equipped with two M8 interfaces:

X1 (8-pin, A code): Rated current 1A, voltage 24V DC ± 10%, providing two digital inputs, two digital outputs, RS485 communication (A/B), requiring overload and short circuit protection from the user end.

X2 (6-pin, A-code): specifically designed for MEMD adapter cables, providing 24V power supply and RS485 communication (TX/RX).

It is recommended to use the "effective high-level input" method for the input wiring of X1, and the "effective low-level output" method for the output. Be sure to strictly follow the typical wiring diagram in the instruction manual, otherwise it may cause short circuit damage to the FIOB board.

4.3 Grounding and equipotential connection

In addition to the shielding layer inside the cable, an additional grounding conductor (cross-sectional area ≥ 4mm ²) must be installed between the robot and the control cabinet to establish a low impedance connection. The robot base is equipped with M4 threaded holes for connecting grounding terminals, with a tightening torque of 2.8 Nm. The equipotential connection must comply with the requirements of VDE 0100 and EN 60204-1.

Safety regulations and collaborative operations

The LBR iico design complies with ISO 10218-1 Class II (collaborative robots) requirements, but safety integration remains the responsibility of the system integrator.

5.1 Basic Safety Principles

Robots must be used for their intended purpose in a technically sound state, and any functional malfunctions must be immediately resolved.

Unauthorized modifications to robots are prohibited, otherwise the warranty will be invalidated.

The integrator is responsible for risk assessment, implementation of safety functions, CE compliance declaration, and preparation of system operation manuals.

If the safety function or protective device is removed or disabled, it is strictly prohibited to operate the robot.

5.2 Personnel Qualifications

Operators must undergo professional training and understand relevant standards and documents.

In emergency situations, non powered mobile robots may be required, and personnel must have received relevant training.

All work must be performed by qualified personnel, and unqualified operations may result in serious injuries.

5.3 Hazardous areas and protective distances

The hazardous area consists of a workspace and a stopping distance, and must be protected by physical protective devices such as safety fences.

If there is no physical protection, the requirements for collaborative operation in EN ISO 10218 must be met.

In manual mode (T1), the speed limit is ≤ 250mm/s, but during manual guidance operation, the speed is limited by safety monitoring rather than reduced.

It is recommended to maintain a safe distance of at least 50cm between the operator and the robot (including tools), which should be determined based on risk assessment.

5.4 Start stop safety

New or modified programs must be tested first in T1 mode, even if only global point data is modified.

Before debugging, it is necessary to change the default password of the system software to prevent unauthorized access.

Personnel with active implants such as pacemakers must maintain a distance of at least 300mm from the motor and brake - even if the motor is not powered, there is still an electromagnetic field present.

Stop distance and time

The stopping distance is a key input in the design of safety fences, consisting of reaction distance and braking distance. The following data is from the measurement method in Appendix B of ISO 10218-1, based on uniaxial motion under rated load, 100% program magnification, and 100% extension conditions.

6.1 STOP 0 (Emergency Stop)

STOP 0 is a stopping method that immediately cuts off the driving power and applies the brake. It has a high system load and should be avoided as much as possible

LBR iico 7 R900.A1 stopping angle 17.13 °, A2 14.02 °, A3 12.32 °; stopping time approximately 0.13-0.14 seconds

LBR iico 12 R1260: A1 8.92 °, A2 11.90 °, A3 11.08 °; stop time approximately 0.16s

LBR iico 16 R1000：A1 14.09°，A2 13.30°，A3 10.42°

6.2 STOP 1 (Controllable Stop)

STOP 1 is to slow down first and then cut off the driving power, and the stopping distance varies with the load, speed, and position. The manual provides detailed curve graphs of various models A1~A3 under different conditions (with/without load, different load masses).

In practical applications, multi axis composite motion can cause longer stopping distances, and it is necessary to conduct actual testing and verification. The trajectory recording function of the system software can be used to measure the angle difference from the trigger point to complete stop.

Transportation and positioning

7.1 Transportation posture

Before transportation, the robot must be moved to the designated transportation position: A1=0 °, A2=-115 °, A3=115 °, A4=0 °, A5=75 °, A6=0 °. In this posture, the robot has the lowest center of gravity and the best stability. The center of gravity position of different models varies in transportation posture, and it is necessary to refer to the center of gravity coordinate table in the instruction manual to select the appropriate lifting point.

7.2 Transportation precautions

Only use approved lifting equipment with sufficient load-bearing capacity.

Avoid vibration and impact during transportation to prevent damage to the robot.

Remove all transportation fixtures (nails, screws, etc.) before handling, and remove rust or adhesive on the contact surfaces.

If using slings/lifting devices for transportation, care should be taken to prevent tipping, and additional fixing measures should be added if necessary. It is strictly prohibited to use the crane for handling in any other way.

Maintenance cycle and key points

The LBR iico series robots are designed to be maintenance free, but still require regular inspections:

Periodic tasks

Check the tightening torque of fastening screws/nuts 100 hours (once only) after startup/re debugging

Clean the outer surface of the robot every 1000 hours or no later than 3 years

Thoroughly clean every 2 years

If the operating conditions of the robot deviate from the specified working conditions in the technical data (such as continuous high temperature, high abrasive environment, near performance limit operation, high load cycle, etc.), the maintenance interval must be shortened or the components must be replaced in advance. For robots equipped with KUKA energy supply system, additional maintenance work is required. Only KUKA approved auxiliary materials and consumables are allowed to be used, unauthorized consumables may cause premature wear and failure of components.

Debugging process and software configuration

9.1 Pre commissioning inspection

Confirm that the robot is correctly installed and tightened according to the document requirements.

Check for non visible damage caused by external forces (such as dents, paint wear), paying special attention to the inspection of the motor and balance system (internal motors are checked through operation).

Confirm that all safety devices are correctly installed and functioning properly.

Confirm that the rated value of the power supply matches the on-site power supply, and that the grounding conductor and equipotential connection cable are sufficient and connected correctly.

Confirm that the connecting cable is properly connected and locked.

9.2 Tilt angle configuration

If the robot is not installed on the ground (wall, ceiling, or any angle), the tilt angle must be correctly input through the system software in the controller. Angle naming: A (rotation around Z axis), B (rotation around Y axis), C (rotation around X axis). Typical configuration: Ground (0,0,0), Wall (0,90,0), Ceiling (0,0180). Entering an incorrect tilt angle can result in unforeseeable motion or overload, and must be checked and confirmed item by item.

9.3 Load data input

The load data of the robot (mass, center of gravity position, moment of inertia) must be verified and entered into the controller through the KUKA Load tool. The rated load is designed to optimize dynamic performance, and the maximum load is only applicable when the center of gravity position is 0mm. Specific load conditions must be verified using KUKA Load. Incorrect input of load data can shorten the service life of robots and overload motors and gears.