Use Case - Touchless control panel

A glimpse behind the scenes

The GETT.PROJECTS modular principle is vividly explained using a customer project for a company that prefers to remain anonymous (hereinafter referred to as “PTRA”).

 

*One of the side-effects of being an OEM service provider is that our customers often enjoy special (project) protection and we only rarely obtain approval to use them for marketing purposes. The abbreviation PTRA is an imaginative term standing for “prefer to remain anonymous”.

Description of the project:

Customer: PTRA*

Product type: Multimedia console

Sector: Machine and appliance construction | Food industry & catering

The PTRA* customer operates in the food industry; however, the product’s features make the console suitable for all design-oriented environments, like points of sale or the furniture industry.

A summary of the customer’s requirements:

PTRA* needed a contemporary, smart and visually appealing multimedia operating panel with six buttons, an NFC interface and a display; a modular structure was needed.

The multimedia panel is not only designed to process button input and display content, but also recognize certain installation configurations and emit switching signals. We also had to handle the complete menu as well as the control and processing logics.

Special challenges during the course of the project:

Because the Covid-19 pandemic developed during the course of the project, a really non-contact, innovative input technology was the preferred option for the visual buttons.

A summary of the project data:

  • Using new kinds of non-contact, visual operating elements with circular illumination and a switching distance of 1 cm
  • A color graphic display: 320 x 240 mm, 2.8²
  • 3 mm toughened glass at the front with a rear design using a screen-printing process
  • A rear assembly frame to accommodate the electronic components
  • The electronic components can be combined and replaced in a modular way
  • Glass glued to an assembly frame
  • NFC interface
  • 2 x RS232 interfaces
  • 230V power supply pack
  • 4 potential-free switch output points

GETT.CONSULTING

Product idea: a multimedia operating panel with an appealing design

GETT Consulting

1st customer visit:

Getting to know the application that the company wanted and the general conditions

  • Analyzing the previous model on the spot
  • Analyzing the requirements
  • Drawing up several technological concepts for presentation at the customer’s premises (including those based on the following technologies: capacitive operating technology, visual operating technology, membrane technology)

2nd customer visit:

discussing the concepts, presenting the advantages and disadvantages, suggested prices

  • The customer opts for one concept and defines more requirements
  • The concept needing to be completed:
    • A glass operating front with illuminated visual buttons and a display for visualization
    • For insertion as a module
      Certain setting options to depend on particular configurations
    • Specifying particular graphic symbols for the display
  • Drawing up the details of the final concept and preparing a list of technical specifications

3rd customer visit:

Presenting the final concept including a binding quotation, signing the list of technical specifications

  • Handover for development to GETT.LAB

GETT.LAB

Dividing up the project into task packages for the different subsections

GETT Lab

Mechanical construction:

  • Glass, frame, assembly, mounting, additional parts
  • Tools used: SolidWorks, 3D printing for prototyping

Design:

  • Preparing the print layout for the glass
  • Tools used: CorelDraw, digital printing on glass for prototyping

Hardware development:

  • Creating the electronic circuit, routing and initial setup for the power supply pack, button PCBs, adapters
  • Tools used: Altium Designer, extensive laboratory equipment for prototyping and testing

Firmware development:

  • Assessing the buttons, interfaces, display content, controlling the output points depending on particular input parameters
  • Tools used: C-Compiler for STM32

Testing concept: 

  • Defining the testing parameters and quantities for semi-finished goods and the final product, defining the button calibration
  • Tools used: calibration tool

GETT.SOURCING

GETT Sourcing

For this project, this module was not used by the customer.

GETT.QUALITY

Tests were completed continually as the item was being developed.

 

GETT Quality

What was tested:

Paint adhesion on the glass, durability of the paint, quality of the print image, durability of the glued joints, fatigue test for the electronics, climatic tests

Tools used:

refrigerator, climatic shock testing cabinet, spectral photometer, cross-cut test according to DIN EN ISO 16276-2

GETT.FACTORY

Various production skills at GETT’s business site in Germany were used to manufacture the final product.

Automatic molding machine:  Was not needed.
Laserautomat:  Wurde nicht benötigt.
Cleanroom: Was not needed.

CNC milling shop:
Manufacturing the retaining frame from an aluminum section
Tools used: CNC milling machine

Printing shop:

Printing the glass front using the silk screen printing process
Tools used:

Assembly: 
Gluing the frame glass, completing the electronics components (diffusing screens, light blockers), inserting the electronic components
Tools used:

QA:

Final checks on the functions and visual quality
Tools used: calibration tool, various types of measurement technology

GETT.CARE

Tests were completed continually as the item was being developed.

 

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