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Solutions · Automation · Upgrades & retrofits

Control upgrades and retrofits that extend the life of what you own.


New controls on robust machinery: SINUMERIK CNC retrofits, obsolete PLC replacements, AS/RS and conveyor control upgrades and custom equipment. We recover the drawings, build the panels in our own UL 508A shop and plan the cutover around your production schedule, so the machine comes back better documented than it left.

CNC · PLC · AS/RS · conveyance · process
SINUMERIK ONE CNC retrofits
Siemens & Rockwell platforms
As-built drawings and backups delivered
Cutover planned around production
Automation at Think-PLC

Where most automation projects start, and the rest.

Robotics, material handling, retrofits and brewhouse controls are the doors people usually come in through. Custom machines, packaging lines, process skids and CNC are the rest, and they all come out of the same engineering office, UL 508A panel shop and fabrication floor in Winston-Salem.

What we retrofit

Breathe new life into the machines you already trust.

A retrofit keeps the iron and replaces the electronics that are failing, unsupported or impossible to get parts for. You get modern controls, current safety, drawings that match the machine and compatibility with today’s software, at a fraction of the cost of new equipment and without a new foundation.

  • Who we help. End users and operations who need to keep systems efficient, minimize downtime and get ahead of obsolescence, and who want one partner for upgrades, maintenance packages and advance notice on system updates.
  • Minimal disruption. Panels are built and tested in our shop while your machine keeps running; the cutover is planned to a schedule and rehearsed on paper first.
  • Better than before. Every retrofit leaves with as-built schematics, program backups, an I/O list and training for your team.
Retrofit control panel built by Think-PLC
CNC retrofit

Lathes, mills, grinders, cutting and additive machines re-controlled on Siemens SINUMERIK ONE with new drives and motors where they are due. Better precision, current safety and a machine tool that can be serviced again.

SINUMERIK numeric control →
PLC retrofit

From factory assembly lines to HVAC and process skids, legacy PLC-5, SLC, S5 and other end-of-life controllers replaced with S7-1500 or ControlLogix, the application re-learned and the process optimized on the way.

AS/RS retrofit

Control upgrades for automated storage and retrieval systems, engineered from the whole system so cranes, conveyors and the host software work together after the change.

Conveyance retrofit

New PLCs, VFDs, MDR cards, photo-eyes and safety on conveyor and sorter systems you already own, turning outdated conveyance into a reliable line again.

Material handling & conveyance →
Custom equipment retrofit

Purpose-built machines with no drawings and no vendor left: assessed, reverse-engineered, re-controlled and documented, one component or the whole system.

Drives, HMI and SCADA

Enclosed VFD packages from stock, WinCC Unified, PanelView and Ignition HMIs, and system backups that safeguard what you have while it is modernized.

Enclosed VFDs →
How a retrofit runs

Assessed, drawn, built, cut over.

Every project starts with a look at the machine and ends with a documented, supportable control system. In between, the work happens in our shop, not on your floor.

1 · Assessment

Site visit, existing drawings (or the lack of them), I/O count, obsolescence risk and a scope with a budget and a schedule.

2 · Engineering

New schematics in EPLAN or AutoCAD Electrical, panel layouts, drive sizing, program design to your standard and a cutover plan.

3 · Build and simulate

Panels built and factory-tested in our UL 508A shop; PLC and HMI code simulated in PLCSIM before it sees the machine.

4 · Cutover and training

Scheduled outage, I/O checkout, start-up, run-off and training, then as-builts, backups and support from the same team.

Fractionof the cost of new equipment, with the iron you already own
UL 508Apanels built and tested before the outage starts
Standardizedretrofit panels for multi-site fleets, one design many plants
Documentedas-built drawings, backups and training on hand-over
Case studies

Retrofits that left this shop.

Standardized retrofit panels for plastic regrind plants

One uniform control standard applied across regrind facilities in North Carolina and California, so every line runs the same panel, the same program and the same spares.

Read the case study →
Aerospace manufacturing on SINUMERIK Run MyRobot

A robot brought onto a SINUMERIK machine-tool control for aerospace production, the machine-tool retrofit approach applied to a 6-axis arm.

Read the case study →
Retrofit control panel
Retrofit panel, built and tested before the outage
Automated storage and retrieval system
AS/RS control upgrade
Conveyor lines
Conveyance re-controlled
SINUMERIK ONES7-1500 · ET 200SPControlLogix · CompactLogixSINAMICS · PowerFlex WinCC Unified · PanelView · IgnitionSafety PLC and light curtainsAS/RS · conveyance · process
Standards & certifications

Built to the standard, partnered with the vendors.

UL 508A panel shopNFPA 79CESiemens Solution Partner: Factory Automation Siemens Solution Partner: Drives & MotionSiemens Solution Partner: Machine Tool Systems Rockwell IntegratorFANUC Robot IntegratorIgnition Certified
Who relies on us

What partners say.

For the most part, if it’s a random project out there I’m calling Bobby… I know that if Bobby works on the project, it’s going to be done and it will be done right.

Ed MontgomeryFood & Beverage Industry Manager, Siemens

They’re more than a panel builder, they’ll run cable, do the programming, the electrical drawings and all of that… Think’s ability to problem solve and troubleshoot on the fly is one of their biggest assets.

Stephen NolanTechnical Director
Running a SINUMERIK machine? Join the workshop. Our SINUMERIK Channel Workshop runs in Winston-Salem on October 22, 2026. Hands-on with the controls we put on retrofitted machine tools.
Workshop details
Design. Build. Install. Service.

Talk to our team about the machine that needs new controls.

Send the nameplate, a photo of the panel and what it does. We will come back with an assessment and a budget.

Contact us Service & support