Take a Factory Virtual Tour

close x

RNA Laser Drill, Vision Inspection System

Written by:

RNA were contracted to design and manufacture an automated laser drilling process cell and inspection system for a range of plastic moulded components. The hole diameters to be drilled ranged from 15um to 50um.


The system incorporated bowl feeder, robotic vision system, walking beam transfer system, laser drilling system, vision inspection stations and a control system. The project was for a global leader of gas detector manufacture for the mining industry.


  • Provide a flexible automation solution for various different components (11 variants)
  • Provide quick and easy changeover between component runs
  • Provide 100% inspection on position, entry hole size and exit hole size



The figure shows the main functional elements of the solution. This particular configuration utilizes one laser drilling station and three camera stations to verify part accuracy.

Laser drilling vision inspection

To begin the process, the components are presented to a vision guided robot by an RNA bowl feeder that feeds parts onto a pick conveyor mounted below the robot. The robot then picks the component and places it in the correct orientation to a nest mounted on a walking beam transfer system.

RNA Laser Drill, Vision Inspection System

With the walking beam transfer system, the component is lifted up by a gripper and moved one position ahead to the laser station. The laser drilling process is triggered and drills the correct size hole in the desired position.

The laser drilling system is supplied by ES Technology who have extensive experience in laser drilling, welding & marking systems, delivering a quality performance at high speed and with great precision.  After the component is drilled, the component is lifted up again and moved to the next station for the first inspection.

RNA enlisted the expertise of our machine vision partner Fisher Smith, who are leading experts in the field of machine vision and industrial control systems. The vision system incorporates 3 camera stations, with the ability to inspect each component for position of the hole, entry hole size and exit hole size. Components that fail the vision inspection are rejected into a reject bin. ‘Good’ components are fed into a collection bin for bagging system and a separate bin for random sampling (1/1000 of ‘good’ components for further off-line checking).

This system has the flexibility to handle various components (11 variants). The bowl feed system utilises an innovative quick-change tooling system that speeds up tooling changes. First, each component variant is provided a unique barcode which contains all the parameter set up for that particular component. When the barcode is scanned, the data is retrieved by the control PC and then the operator should change the tooling models to meet all those parameters. The control PC automatically recognizes if incorrect sets of tooling is fitted. This validation process takes just seconds, and eliminates the risk of inadvertent human errors.

A fully validated changeover to switch from one component to another can be accomplished in less than 5 minutes, resulting in improved uptime and productivity.

Key features & benefits

Provides a complete solution simple, quick changeover between components of different sizesHandling system and laser driller fully automated
Precision measurement +/-1 micronVision inspection system
Minimal changeover for various components; tooling changeover time less than 5 minutesBarcode identification to verify the changeover process
All safety interlocks supplied and fittedPoka-yoke design
SPC (statistical process control) – It monitors and records key processing data. The data recorded can be tested with Boolean logic to create an in-process Go/No Go gauge, to help ensure that the laser process is stable and produces constant output.Future proof – the control system can be programmed to suit new or additional components.

Learn More About Our Vision Inspection Systems >


Robotic spray booth for panoramic frames

Robotic Spray Booth for Panoramic Frame

RNA have designed and developed a semi-automated spray booth to apply an adhesive coverage to the panoramic steel frame and ...
Read More
Robotic Packaging System Packs Filler Caps

Robotic Packaging System Packs Filler Caps

RNA developed an automated robotic packaging system for packaging 2 different types of filler caps. The system utilises a machine ...
Read More
Robot System for Automatic Screw Shear and Bung Assembly

Robot System for Automatic Screw Shear & Bung Assembly

The world’s leading manufacturer of electricity meters approached RNA to design and developed a robot assembly system for automatic screw ...
Read More

See all success stories

Case studies Featured products Recent news0 comments

  • Contact Details

    RNA Automation Ltd

    Unit C Castle Bromwich Business Park Tameside Drive, Birmingham B35 7AG, UK

    T:  +44 (0)121 749 2566

    E:  sales@rnaautomation.com

    Fax:  +44 (0)121 749 6217

Take a Factory Virtual Tour