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CASE STUDY

Melt Room Cut-off Saw Systems

Turn-Key PLC-Controlled Cut-off Saws Engineered for a Precision Metals Minting Facility

The Challenge

A confidential leading manufacturer in the minting industry operates a melt room facility in Coeur d'Alene, ID where precious metal stock is processed into billets and cut to precise lengths for downstream production. The existing cut-off saw equipment had reached the limits of its usefulness — sourced from an overseas manufacturer, replacement components were difficult to locate and expensive to procure, creating unacceptable maintenance risk in a production-critical environment.

The facility needed a purpose-built solution that addressed the shortcomings of its legacy equipment:

• Overseas-manufactured saw with limited parts availability — sourcing replacement components required long lead times and significant effort, exposing the melt room to extended downtime risk
• No variable speed or programmable feed control — the existing saw lacked the flexibility to optimize cut parameters across different metal alloys, stock dimensions, or production speeds
• Fixed, non-adjustable operating configuration — no ability to tune feed rates, blade speed, or clamping sequences through a control interface
• No PLC-based automation — saw operation depended on manual sequences without interlocks, position feedback, or automated cycle control
• Footprint and installation constraints — the melt room environment required a compact machine installable quickly without extensive site modifications

The Solution

Logic Control Systems designed, fabricated, and delivered a turn-key PLC-controlled cut-off saw system engineered specifically for the client's melt room application. The system was built around an American-manufactured vertical cold cut-off saw platform with a custom controls package, hydraulic lift, pneumatic clamping, and a full lube system — delivered as a complete, installation-ready unit. The client had the option of one or two identical saw systems, providing production redundancy.

American-Manufactured Saw Platform

The foundation of the system is a domestically manufactured vertical cold cut-off saw, selected specifically to ensure straightforward access to replacement components and vendor support. The saw features a 4-horsepower motor, 14" blade capacity, variable feed rates, multiple speed options, vertical feed, and a small footprint suited to the melt room environment. Domestic manufacture was a deliberate design choice — eliminating the parts sourcing challenges that had plagued the client's legacy equipment.

Allen-Bradley MicroLogix 1500 PLC Controls

All saw control logic runs on an Allen-Bradley MicroLogix 1500 PLC housed in a NEMA 12 enclosure, with operator controls mounted on the front panel face for convenient access. The PLC manages the full cut cycle — blade speed selection, feed rate control, hydraulic lift/drop sequencing, and pneumatic vise clamping — based on an operating sequence reviewed and approved by the client prior to programming.

Hydraulic & Pneumatic Motion System

The saw's motion system mirrors the client's existing equipment architecture for operator familiarity. The vertical lift and drop of the saw blade is hydraulic, using PPT hydraulic components. The vise, eject ram, slide, and lube functions are all pneumatic — providing fast, reliable clamping and part ejection with minimal maintenance requirements.

Lube System

An integrated lube system with dedicated tank, lines, and nozzles delivers consistent lubrication to the blade and cutting zone throughout the cut cycle. Proper lubrication extends blade life and ensures consistent cut quality across different metal alloys and stock dimensions — a critical consideration in a precious metals environment where material waste has direct cost implications.

Turn-Key Delivery & Warranty

The system was engineered for minimal installation complexity. Commissioning requires only setting the saw in place, leveling it to the correct working height, and connecting the electrical supply, control power, and air line. The complete system is backed by a one-year warranty covering all components and workmanship.

Designed around domestic manufacturing from the ground up — every major component on the new cut-off saw system is American-made, ensuring that replacement parts are readily available and vendor support is a phone call away, not a six-week international freight order.

Technology at a Glance

Commissioning & Startup

Prior to fabrication, LCS conducted a detailed review of the cut-off saw's operating sequence with the client and documented the approved logic as the basis for PLC programming. Commissioning included:

• Electrical I/O checkout — all control wiring, sensors, solenoids, and panel components verified against the AutoCAD schematics
• PLC program testing — full cycle verification including blade speed selection, hydraulic lift/drop sequencing, pneumatic vise clamping, eject ram, and slide functions
• Hydraulic system testing — PPT hydraulic circuit checkout, pressure verification, and lift/drop cycle timing confirmation
• Pneumatic system testing — vise, eject, and slide functions tested across the full operating cycle with correct pressure and timing verified
• Lube system checkout — flow confirmation to all nozzle points across the cutting cycle
• Two hours of operational training delivered to client melt room operators covering normal operation, speed and feed selection, alarm response, and routine maintenance checks

Results & Impact

The turn-key cut-off saw system gave the melt room a modern, maintainable, and operationally flexible cutting platform tailored to the demands of a precision metals production environment:

• Domestic manufacture eliminates the parts sourcing delays that created downtime risk with the legacy overseas-built equipment — replacement components are readily available through standard supply channels
• PLC-based cycle control replaces manual sequencing with consistent, repeatable automation — reducing operator-to-operator variation and cycle time variability
• Variable feed rates and multiple blade speed options give operators the flexibility to optimize cut parameters for different metal alloys and stock dimensions without mechanical adjustments
• Integrated lube system extends blade life and maintains consistent cut quality, directly reducing consumable costs in a precious metals processing environment
• Turn-key delivery and simple installation requirements minimized facility downtime during cutover — the system was operational within hours of delivery
• One-year parts and workmanship warranty provides the client with covered maintenance support through the initial production period
• AutoCAD electrical schematics and all PLC program files delivered in electronic format give the client a complete technical record for long-term maintenance and future modifications

About Logic Control Systems

Logic Control Systems (LCS) is a Texas-based industrial automation integrator specializing in PLC programming, SCADA/HMI development, process control, electrical panel fabrication, commissioning, and remote automation maintenance. LCS serves clients across the U.S. in industries including food processing, fabrication, chemical, oil and gas, pharmaceutical, and water/wastewater.

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