Label Box

Overview

The Label Box System is an industrial-grade printing and rewinding unit designed for thermal label printing and roll management in pharmaceutical serialization workflows
Built around the Zebra industrial printer, this compact yet powerful system automates the printing, inspection, and rewinding of serialized label rolls — ensuring perfect accuracy and reliability before labels enter the production line

Developed through three major design generations, the Label Box represents the evolution of compact, service-friendly printing modules that combine mechanical precision, reliable electronics, and smart control logic

System Concept

Labels are printed using the Zebra industrial thermal printer, capable of high-resolution text and DataMatrix code generation at high speed
After printing, the labels pass through a series of rollers and tension-controlled guides, ensuring smooth movement and even winding on the take-up reel

A rewind motor and tension feedback sensors keep the roll perfectly aligned and uniform
The entire system is housed in a sealed industrial cabinet containing

• The printer module

• A motorized rewinder

• Control panel and PLC-based electronics

• Industrial PC for job management and code verification

Electrical & Control Design

I personally designed the electrical system and control logic using EPLAN, integrating

• FATEK PLC for process coordination and safety interlocks

• Schneider power modules and protections

• Omron and Pepperl+Fuchs sensors for web detection and fault feedback

• Industrial HMI for monitoring, calibration, and production data logging

The system automatically stops printing in the event of

• Ribbon break or end

• Label jam or feed error

• Code verification failure

Visual and audible alarms notify the operator, ensuring no defective label rolls are produced

Software & Verification

The system interfaces with serialization management software, synchronizing label data and print layouts
Each print job is validated against production batches, allowing for traceable label generation with unique GS1-compliant DataMatrix codes
The industrial PC maintains full data history and generates roll completion reports for audit purposes

Evolution Across Three Versions

Over its development cycle, the Label Box underwent three major iterations

1. V1 – Basic Integration: Initial Zebra printer setup with manual rewinding

2. V2 – Automated Rewinder: Added motorized roll take-up with adjustable tension control and HMI monitoring

3. V3 – Smart Label Box: Complete industrial cabinet, improved cable routing, modular electrical design, and integration with higher-level serialization servers

Each version brought higher automation reliability, smoother operation, and improved serviceability

My Role & Vision

As the electrical designer and integrator, I led the development from concept to final production, focusing on compact design, operator safety, and seamless data connectivity

This system forms a key link between label serialization and inline packaging