CNC robots: When and how to automate machine tending

Robotics & Market Insights

CNC robots: When and how to automate machine tending

By HowToRobot -
Editorial team
CNC robots automate machine tending, boosting machining productivity, efficiency, and quality. Let's explore their applications, benefits, challenges, and how to choose the right solution.

Computer Numerical Control (CNC) machining has long been a cornerstone of manufacturing, but the integration of robotics is significantly improving productivity and quality.

This article explores CNC robots, their applications, benefits, and challenges. We'll also discuss how to choose the right CNC robot and where to get expert help for implementation.

What is a CNC Robot?

A CNC robot, also known as a CNC machine tending robot, is designed to interact with CNC machines. These robots are typically articulated arms programmed to load and unload materials, and can perform post-machining tasks. By automating the machine tending process, CNC robots bridge the gap between traditional CNC machining and fully automated CNCs using pallet systems, for example.

CNC robots come in various sizes and configurations, from small collaborative robots (cobots) suitable for lighter tasks to large industrial robots capable of handling heavy workpieces. These automation cells are equipped with end-of-arm tooling (EOAT) specifically designed for the parts to handle, a robot stand or cart, and a part presentation system at a minimum. Some CNC robot cells can also include "regrip" or "zero" stations, cleaning, inspection, or post-operations stations, and more.

A collaborative robot (cobot) loads a workpiece into a CNC lathe machine, illustrating smaller-scale automation solutions for lighter tasks.

What Can You Use CNC Robots For?

CNC robots' primary function is machine tending, where they excel at loading and unloading workpieces into CNC machines, allowing for continuous operation. This automation reduces downtime between cycles and enables 24/7 production capabilities. Beyond this, CNC robots can perform other tasks in front of the CNC as needed like inspection, cleaning, or deburring as examples.

Advanced CNC robot cells can be set up for multi-machine operation, tending to multiple CNC machines at once.

Benefits of Automating CNC Machining

Integrating robots into CNC machining processes offers numerous advantages. CNC robots boost output and reduce production times by avoiding waiting for the operator to swap parts between cycles. The operator can prepare multiple parts on the robot tray or cart for continuous operation. This maximizes machine utilization and throughput, allowing manufacturers to meet demanding production schedules.

Automated systems ensure uniform handling and positioning of parts, leading to more consistent quality. This reliability reduces variations in part quality and minimizes scrap rates, contributing to overall efficiency and cost-effectiveness.

Getting a CNC robot can free up your CNC operators and assign them to more value-added tasks like setting up a new production, doing test runs, quality controls, and more. They can also allow you to upskill them so that they can program new parts both on the CNC or the robot or even do another CNC robot installation, for example. With the current labor shortage, maximizing the value and use of your current employee can positively impact your bottom line.

While the initial investment in CNC robots may typically vary from $100k to $250k+ USD, the long-term cost reduction often results in a strong return on investment. Labor cost savings, increased efficiency, reduction in errors, and improved productivity all contribute to overall cost savings over time.

Modern CNC robots offer flexibility, as they can be reprogrammed for different tasks or adapted to new parts. This adaptability is crucial in today's dynamic manufacturing environment, allowing companies to pivot quickly in response to changing market demands or product specifications.

A robotic arm automates the loading process for a CNC lathe machine.

Challenges with Automating CNC Machining

Despite its benefits, automating CNC processes with robots presents some challenges. The upfront investment for robotic systems can be substantial, which needs to be considered. Careful financial planning and ROI analysis are recommended before implementation.

The complexity of integrating robots with existing CNC machines and production workflows can be daunting. Because there are various CNC machine brands with different controller types, there is no "one-size-fits-all" integration solution. Some use non-invasive systems with pneumatic valves pressing the physical buttons of the CNC and others wire the robot controller into the CNC controller for more robust and advanced functions. This often requires specialized expertise and may necessitate partnerships with experienced system integrators to ensure smooth implementation and optimal performance.

Implementing and maintaining robotic systems introduces a skill gap in many organizations. Existing staff may need to acquire new skills like robotic integration, programming, operation and maintenance through training. Some companies might need to hire specialists. Investing in workforce development is essential for successful automation and long-term system maintenance.

Robotic cells often require additional floor space. This may be a constraint in some facilities, necessitating careful layout planning to optimize space utilization without disrupting existing workflows.

How to Choose the Right CNC Robot Automation Solution

Selecting the appropriate CNC robot solution requires careful consideration of several factors. Begin by thoroughly assessing your needs, evaluating your production volume, part sizes, and required payload and reach capacity. This assessment will guide you in choosing the right robot size and capabilities to match your specific requirements.

When evaluating options, consider future needs and choose systems that can adapt to future production requirements. Consider potential new part types or secondary operations you might add to the cell in the future to ensure your chosen solution can accommodate those changes.

Explore how the robot can integrate with your existing CNC machines and software systems. Compatibility with your current processes and infrastructure is crucial for smooth implementation and to maximize the benefits of automation.

Before making a decision, conduct a thorough ROI analysis to assess the feasibility of automating. Consider both immediate and long-term financial impacts of automation, including factors like increased productivity, reduced labor costs, and improved quality.

When selecting a vendor, consider if you need to prioritize those that offer comprehensive support and training. This ensures your team can effectively operate and maintain the robotic system, maximizing its value and longevity.

Finally, make sure that a safety risk assessment is performed on your CNC robot cell design, especially if robots will be working alongside human operators.

Where to Get Help and Find a CNC Robot Solution

Navigating the complexities of CNC automation can be challenging, but you don't have to go it alone. HowToRobot offers expert guidance to help you determine how to automate your CNC machine tending operation most cost-effectively.

Our platform connects you with a network of vetted automation suppliers, and we provide vendor-neutral advice to assess the feasibility of your application and ensure you find the right solution for your specific needs.

→ Looking for vendor-independent expert advice? Explore our advisory services and connect with us to discuss your CNC automation needs. Our experts can help you determine if automation makes sense technically and financially for your specific application.

→ Ready to find the right automation solution? Share your project details with us. We'll help you scope requirements, connect with vetted automation suppliers, and receive a range of custom offers. This approach allows you to compare different solutions and find the best fit for your needs and budget.

Whether you're looking to automate a single CNC machine or an entire production line, HowToRobot can assist in scoping your requirements, comparing different automation options, and connecting you with suitable suppliers. By leveraging our expertise, you can streamline your journey towards efficient, robot-assisted CNC machining.