Engineering Expertise

Off-the-shelf automation is built for the average process. When your process is not average, you need something engineered specifically for what you are trying to achieve. This guide covers how custom machine design works, the key disciplines involved, and what separates systems that perform from those that disappoint.

What Is Custom Machine Design?

Custom machine design is the process of engineering purpose-built automated systems tailored to a specific manufacturing process, product, or environment. Unlike standard equipment, custom machines are built from requirements rather than adapted from a catalog. They integrate mechanical, electrical, controls, and software disciplines into a single cohesive system designed to meet defined performance, throughput, and quality targets.

Custom automation is the right answer when standard equipment cannot meet your tolerance, cycle time, or integration requirements, when your process must be documented and validated for a regulated environment, or when the production capability you are building is itself a competitive advantage. Explore our full machine and system design services to see how we approach these challenges.

The Custom Machine Design Process

A well-executed project follows a structured path: requirements definition, concept development, proof of concept, detailed CAD modeling, fabrication, and integration, culminating in full Factory Acceptance Testing (FAT). Skipping steps is the most common reason automation projects exceed their budgets and timelines.

The most critical phase is requirements definition. Vague requirements produce vague machines. Every downstream decision, from mechanical concept to control architecture, flows from what is agreed at the start. Concurrent cross-discipline collaboration at the concept stage, with mechanical, electrical, controls, and software engineers working together rather than in sequence, eliminates the coordination gaps that drive rework.

In-house fabrication capabilities, including 5-axis CNC milling, 4-axis live-tooling lathes, and rapid prototyping with SLA and FDM 3D printing, allow design iterations to occur physically rather than just in simulation. This accelerates timelines and surfaces integration issues before they become expensive fixes during commissioning. Our research and development team supports proof-of-concept validation before committing to a full build.

Industrial Automation Design and PLC Programming

Industrial automation design governs how an automated machine operates: the control systems, sequences, interlocks, and communication layers that turn mechanical motion into a reliable production process. PLC programming is the foundation of this work, covering ladder logic, structured text, and function block programs that execute machine sequences, manage I/O, and handle safety functions.

Common platforms include Allen-Bradley, Siemens S7, Beckhoff, and Phoenix Contact. Protocol selection, including EtherCAT for high-speed motion, Ethernet/IP and Modbus TCP for device communication, and IO-Link for intelligent sensor integration, is a design decision that affects system performance and long-term maintainability. HMI development, built on Qt or native platforms with high-resolution capacitive touch displays, provides operators with clear visibility into the system state and accelerates fault diagnosis.

Motion Control Systems and Robotics Integration

Motion control systems combine servo drives, motors, feedback devices, and control software to deliver precise, repeatable movement. For demanding applications, Copley servo drives provide high-bandwidth current control and the tuning capability needed for micron-level positioning. Trajectory optimization, force feedback control, and conveyor tracking are developed as part of the integrated controls architecture.

Robotics integration brings together mechanical work cell design, end-of-arm tooling, robot programming, safety guarding, and integration with the broader controls system. Supported platforms include Fanuc, ABB, Staubli, Yaskawa Motoman, Universal Robots, Epson, DENSO, Doosan, and Comau. Platform selection depends on payload, reach, cycle time, environment, and the client-partner’s existing infrastructure. Peripheral integrations with Flexibowl feeders, Zaber linear stages, and Clearpath servo motors are handled as part of the cell design to ensure the complete system operates as a coordinated unit. See our automation and system design capabilities for more details.

Industrial Vision Systems

Industrial vision systems use cameras, lighting, optics, and image processing to inspect, measure, and guide production processes at speeds that manual inspection cannot match. Camera selection spans area scan cameras from Cognex, FLIR Teledyne, IMPERX, and Teledyne DALSA for part inspection and dimensional verification, to Hermary and Teledyne DALSA line scanners for continuous surface inspection.

Vision algorithm development ranges from classical approaches using Cognex VisionPro and OpenCV to AI-based detection using YOLO, Darknet, and custom neural networks trained on application-specific defect libraries. In vision-guided robotic systems, the vision system identifies part position and orientation in real time, and the robot adjusts its trajectory accordingly. This integration requires tight coordination between vision processing, robot controller communication, and PLC handshaking, engineered as a unified system.

Machine Safety Standards

Machine safety must be designed in from the beginning of the project, not added after the mechanical and controls design is complete. In North American markets, key standards include ANSI B11 for general machinery, ANSI/RIA R15.06 for industrial robots, and ISO 13849 and IEC 62061 for functional safety of control systems. Safety PLCs, including Keyence safety controllers, allow safety logic and standard control logic to coexist in a validated architecture.

For OEMs selling into regulated markets, documented compliance with applicable ANSI and ISO standards is part of what a client-partner is purchasing. Risk assessment documentation, safety function Performance Level (PL) or Safety Integrity Level (SIL) ratings, and validated E-Stop and guarding architectures should be standard project deliverables.

How to Evaluate a Custom Automation Engineering Partner

The engineering partner you choose has more impact on the outcome of your automation project than almost any other decision. A few things to evaluate before you commit:

• In-house interdisciplinary capability. The most significant risk in complex automation is the coordination gap between mechanical, electrical, controls, and software disciplines. A firm that handles all four under one project structure eliminates the misalignment that occurs when disciplines are subcontracted separately.

• Fabrication and prototyping infrastructure. A firm with in-house machining and rapid prototyping can iterate designs physically, not just in CAD. This compresses timelines and surfaces integration issues before they become commissioning problems.

• Validation process rigor. Ask specifically about FAT and SAT procedures, FMEA practices, and how design changes are documented. A firm with a mature process will have clear answers.

• Accountability for outcomes. The best automation partners share accountability for system performance, not just project completion. Ask how the firm handles situations in which the system does not meet the agreed-upon acceptance criteria after commissioning.

Frequently Asked Questions

What is the difference between custom machine design and standard automation?

Standard automation uses commercially available equipment configured for a broad range of applications. Custom machine design starts from requirements and engineers a system purpose-built for a specific process and environment. Custom automation typically delivers higher throughput, tighter quality control, and better integration with existing production infrastructure.

How long does a custom machine design project take?

A straightforward automated test fixture might be completed in 8 to 12 weeks. A multi-robot cell with vision guidance, custom conveyor integration, and full safety architecture can take 6 to 18 months from requirements through site commissioning. The full project timeline is defined during the scoping process, once requirements are documented and the engineering approach is validated. Well-defined requirements and an engineering partner with in-house fabrication capabilities are the two factors that most reliably compress that timeline. Start the scoping conversation here.

What industries benefit most from custom automation systems?

Industries where product complexity, process precision, or regulatory requirements exceed what standard equipment can handle benefit most. These include aerospace and defense, energy infrastructure, medical devices, food and beverage processing, and advanced manufacturing where the cost of quality failures significantly exceeds the cost of the automation investment. Our Engineering as a Service model is well-suited to companies in these industries that need senior engineering depth without the overhead of a full in-house team.

Building Automation That Performs

Custom machine design done right reduces labor costs, increases throughput, tightens quality control, and creates a production capability that competitors cannot simply purchase from the same catalog. The key is an engineering partner who brings all disciplines to the problem and shares accountability for the outcome.

Bravo Team is a Charlotte-based engineering firm with 54 engineers, machinists, and specialists across mechanical, electrical, controls, software, and robotics. With 384 collective years of engineering experience, 5 Licensed Professional Engineers, and more than 200 custom automation systems delivered across aerospace, energy, and advanced manufacturing, we bring the depth and accountability to solve what standard solutions cannot.

If your production challenge needs a purpose-built solution, our engineers are ready to dig in.