Mechanical + Electrical + Controls Under One Roof — No Sub-Contracted Integration

PLC, HMI, drives, vision, safety — engineered as one system

The split-vendor model — mechanical builder hands off to a separate controls integrator — is the most common reason custom automation projects miss schedule and miss runoff. The mechanical design assumes one thing about how controls will work. The controls integrator interprets the design differently. The two teams find the gap at integration, when the schedule has no slack left.

At Bristol, the controls engineer is in the same building as the mechanical engineer through the entire build. Sensor placement is decided when the bracket is designed. Safety category is selected when the guarding is drawn. PLC code is written by someone who has stood next to the machine and watched it run. The result is a machine that hits its takt the day it's installed — and holds it for the second decade of service.

Allen-Bradley, Siemens, Beckhoff — the platforms we standardize on

• PLC: Allen-Bradley CompactLogix and ControlLogix (primary); MicroLogix for simpler retrofits; Siemens S7 on customer-standard projects.
• HMI: FactoryTalk View (Allen-Bradley) as the standard platform; Siemens TIA and other industrial HMI on customer request.
• Servo motion: Kinetix (Allen-Bradley) integrated servo and Yaskawa servo drives for indexed positioning, synchronized axes, and precision feed.
• Pneumatics: SMC and Festo valve manifolds, cylinders, and flow controls — selected per application and customer serviceability preference.
• Sensing: Keyence, Banner, and Sick sensors for presence, position, and measurement; selected for environment, resolution, and teach-mode access by the customer’s maintenance team.
• Vision: Keyence IV5 and Cognex In-Sight 2D vision for part presence, orientation verification, and dimensional inspection integrated into the PLC safety and quality logic.
• Safety: Cat 3/PLd minimum on operator-access zones; Cat 4/PLe on perimeter guarding where risk assessment requires. Standards: ANSI B11, NFPA 79, ISO 13849. Safety circuits designed, validated, and documented before the machine ships.
• Communications: Ethernet/IP, Profinet, Modbus TCP, and serial protocols for upstream/downstream integration.

What ships with the machine: a controls package your maintenance team can actually use

Every Bristol machine ships with a controls documentation package designed so a competent electrician can troubleshoot it without calling us — and so we can support it remotely in the rare case they need to. Full electrical schematics (power, control, and safety circuits). Panel layout and bill of materials. I/O lists with sensor placement and tag mapping. HMI screen documentation. PLC source code where the customer requires it. Operator and maintenance manuals. Safety validation records. The controls architecture is reviewed with the customer before procurement — no surprises at runoff about platform selection.

Keeping 1990s and 2000s iron in production: controls retrofit

The mechanical structure of a well-built production machine from 1998 is still solid. What fails is the PLC the original manufacturer no longer supports, the ladder logic nobody documented, and the safety relays that fail at a rate that's starting to affect OEE. Bristol replaces the brain without scrapping the body. Current-generation Allen-Bradley or Siemens PLC, color touchscreen HMI, safety-rated architecture, documented and maintainable code — installed in the same frame that's been running production for 25 years. Typical retrofit lead: 8–16 weeks.