CNC breakdown investigation and repair
When a machine stops or repeatedly interrupts production, understanding the cause is the first step towards an effective repair.
PMI investigates stopped machines, recurring alarms and intermittent faults. We consider the control system, electrical equipment and mechanical condition together, tracing the reported problem through the systems involved.
What our CNC fault finding covers
The investigation follows the symptoms and the way your machine operates, with attention to the relevant areas:
- CNC controls and software — Investigating control errors, software behaviour and communications between connected devices.
- Drives, motors and feedback — Tracing drive alarms and movement faults across the motion system.
- Electrical supplies and machine signals — Checking the supplies, sensors, inputs and outputs involved in the reported fault.
- Machine sequence and interfaces — Investigating where the operating cycle is interrupted and how connected equipment contributes.
- Mechanical condition and loading — Assessing how the machine’s condition and mechanical load affect its operation.
This approach helps establish the underlying problem and focus repair work where it is needed. We explain the findings and proposed next steps so you can make an informed decision about repairs and replacement components.
Planned CNC machine servicing
Plan servicing around your equipment and production schedule.
PMI uses the machine’s condition, operating pattern, service history and manufacturer information to agree the maintenance work and a practical downtime window.
Tell us about recurring alarms, changes in performance or other operating concerns when arranging a service. This helps us plan the attention your machine needs and discuss any diagnostic work before the visit.
Experience with CNC machinery and control systems
Effective fault finding depends on understanding how the machinery, controls and motion equipment work together. PMI brings practical experience across these areas to CNC service and repair.
Our experience includes:
- HOMAG machinery — Woodworking machinery fault finding and maintenance.
- Beckhoff systems — Including TwinCAT and EtherCAT.
- Bosch Rexroth and IndraDrive — With experience using IndraWorks and DriveTop.
- Inovance equipment — Practical automation engineering experience.
Our software experience also includes CODESYS. We provide independent engineering support, bringing machinery knowledge and controls expertise together to understand the installed system.
Replacement parts and machine upgrade options
When a repair requires a replacement component, PMI can help identify the correct part and assess sourcing options. We consider its specification, interfaces and configuration within the existing machine.
For older equipment, we can investigate obsolete automation parts and replacement options. Where a wider change is worth considering, a CNC retrofit assessment can help you compare a targeted repair, a partial upgrade and broader modernisation.
This gives you a clearer basis for addressing the immediate problem and planning the machine’s future use.
CNC service and repair FAQs
Can you investigate an intermittent fault if the machine is running again?
Yes. Intermittent faults are part of PMI’s fault-finding work. Record the alarm, what the machine was doing when it appeared and any recent changes. Photographs of the fault screen and notes on when the problem occurs help guide the investigation.
Can a machine fault be investigated during a planned service?
Tell us about it when you enquire. We can discuss the diagnostic work alongside the servicing requirement and plan the visit around the time and access your machine needs.
What if I do not know the CNC control or machine model?
Email a clear photograph of the machine identification plate and the control screen, along with a short description of the problem. This gives us a useful starting point for identifying the equipment and discussing the work.
Arrange CNC service or repair
Put practical machinery and controls experience behind your next service or repair. PMI provides engineering support from Craigavon, with coverage across Northern Ireland and the Republic of Ireland.
Send the details you have, including:
- The machine manufacturer, model and control type, if known.
- The fault or servicing requirement, including any exact alarm and whether production is stopped.
- Recent work, changes or useful service history.
- Your site location and required timing.
Email pmi-enquiries@precisionmachineindustries.com. Photographs and relevant documentation can be sent by email.
Attendance, timing and the work required are agreed with you before the visit.