Retrofit of CNC Machines – Modernization Instead of New Purchase
A retrofit means the targeted modernization of existing CNC machines by replacing outdated control, drive, and electronic components – while continuing to use the existing, often mechanically high-quality machine base.
The result: significantly higher performance, better availability, and modern functions – at a fraction of the cost of a new machine.
Why a CNC Retrofit?
Many machines have stable mechanics but suffer from:
outdated controls (e.g., Siemens S5, Sinumerik 810, Bosch CC)
lack of spare parts availability
limited usability
missing network connections or data interfaces
increasing downtime
A retrofit brings your machine technically up to date – economically and sustainably.
Advantages of a Retrofit
Cost Savings
50–70% cheaper than a comparable new machine
Use of existing mechanics and infrastructure
Lower investment risks
Increase in Productivity
Shorter cycle times through modern control technology
Higher precision and dynamics
Modern user interfaces and programming options
Future-proofing
Spare parts available long-term
Integration into Industry 4.0 environments
Network, OPC-UA, and data interfaces
Sustainability
Extension of machine service life by 10–20 years
Resource-saving through reuse of mechanical components
Retrofit with Sinumerik One
The Siemens Sinumerik One is Siemens’ current high-end CNC platform and ideal for demanding retrofit projects.
Advantages:
Highest performance and path quality
Digital Twin integration for simulation and virtual commissioning
Seamless integration into TIA Portal and industrial networks
Future-proof platform for series production and high-precision machining
Perfect for complex machines, multi-channel, or high-speed applications
Retrofit with LinuxCNC
LinuxCNC is a powerful open-source alternative for flexible and cost-effective modernizations.
Advantages:
Very low system costs
High adaptability and open architecture
Ideal for special machines, single pieces, and flexible applications
Integration of individual functions, automation, and custom software solutions
Real-time capability on industrial PC systems
How efficient is the machine after a retrofit?
Typical improvements:
+20–40% higher productivity
significantly reduced downtime
modern user interface and faster programming
better process stability and repeatability
Integration of:
tool management
remote maintenance
production data acquisition
interfaces to ERP/MES
In many cases, the machine reaches almost the performance level of a new machine after the retrofit.
Specialized Retrofit Solutions for Series Machines
The Retrofit GmbH develops custom hardware and software solutions to implement retrofits in the most economical way – especially for machines used in larger quantities.
Own interface platforms for:
Siemens S5 → modern controllers
Sinumerik 810/820 → current CNC systems
Bosch CC control series
Through self-developed interface boards, existing:
I/O wirings
operator panels
drive systems
sensor interfaces
can be reused.
Result:
significantly reduced conversion costs
minimal downtime
standardized retrofit kits for series machines
Profitability at a Glance
| Measure | Costs |
|---|---|
| New Machine | 100 % |
| Standard Retrofit | approx. 30–50 % |
| Retrofit with Series Interface Solutions | often under 30 % |
The payback period often occurs within 1–2 years due to higher productivity and lower downtime costs.
Conclusion
A CNC retrofit is the economically and technically viable alternative to purchasing new.
With modern controls such as Sinumerik One or LinuxCNC as well as specially developed interface solutions for series machines, Retrofit GmbH offers customized, cost-efficient modernization concepts – for more performance, higher availability, and long-term investment security.