Robotic Turntable Cells and Integrated Deburring Automation
- CNC Solutions
- Aug 5
- 3 min read
A machine shop was facing a common challenge in high-mix CNC production: labor-intensive part loading and unloading, hand deburring, and inconsistent spindle utilization. To solve this, CNC Solutions designed two turntable automation cells that handle machine tending, regripping, and deburring for a Mazak HMC 5000, enabling operators to load multiple parts and walk away while the machines continue running.
The Challenge
Before automation, operators manually loaded parts into the machine, performed hand deburring, and monitored quality, tasks that were time-consuming and prone to human error. Spindle downtime was a bottleneck, and maintaining consistent quality for cast parts with loose tolerances added complexity. Operators often spent significant portions of their shift performing repetitive tasks instead of focusing on higher-value activities.
The Automation Solution
CNC Solutions implemented two turnkey automation cells that integrate rotary index tables, regrip stations, deburring stations, and a manual inspection conveyor into a single, continuous workflow. Raw parts are loaded onto the rotary table and stacked for robotic picking, while finished parts are returned to the table after machining.
The regrip station ensures each part is properly oriented and verified before entering the CNC fixture, while the deburring station removes edges created during machining. Operators can inspect parts in batches using the inspection conveyor without interrupting the robotic cycle, allowing quality checks to occur in parallel with production.
By automating loading, regripping, deburring, and inspection, operators no longer need to hand-load or manually deburr parts. Multiple parts can be loaded at once, enabling true walk-away operation. Each cell provides up to eight hours of queued runtime, supporting unattended and off-hours production while the robot maintains consistent part flow and the machine continues cutting.
Technical Challenges & Innovations
One of the biggest challenges was the turntable design. Each table measures 80 inches in diameter and supports roughly 4,000 pounds of parts. Managing the inertia of such a large load required a custom solution. CNC Solutions selected a robotic planetary gearbox paired with a servo motor, which provided the torque, repeatability, and strength necessary to handle the load while offering a lower-cost alternative to a cam-follower indexer.
End-of-arm tooling (EOAT) was another key challenge. The cell needed to handle individually fixtured parts arranged in vertical columns on the rotary table while accommodating cast components with loose tolerances (±0.125") and still achieving repeatable, precise placement. To meet these requirements, the EOAT was designed with an integrated gripper, push cylinder, part-detection sensors, and a quick-change interface, providing both placement accuracy and flexibility for future part variations.
Handling two distinct part numbers in a single cell without any changeover required careful integration. The regrip station orients and qualifies parts before loading them into the fixture, while dual sensors confirm presence, alignment, and part identification to make sure the correct part is loaded.
If a discrepancy is detected, the system alerts the operator immediately, ensuring consistent operation and minimizing errors.
Workflow
The workflow follows a continuous, repeatable sequence that maximizes spindle time. The robot first unloads a finished part from the CNC machine and deburrs it at the dedicated station. Once processed, the part is placed back on the rotary table. The robot then picks a raw part from the table, qualifies, and regrips it, and loads it into the CNC fixture. This sequence repeats for the remaining parts, after which the robot initiates a pallet change so the CNC can continue processing the next batch. Meanwhile, operators can perform inspections or load additional raw parts without interrupting the cycle.
Results & Benefits
By implementing the automation cells, the customer reduced manual labor, increased spindle utilization, and improved consistency across parts. Robotic handling ensures precise, repeatable placement, reducing the likelihood of human error. The system can accommodate multiple part types with no changeover, giving the shop flexibility to manage mixed production runs. Operators benefit from an efficient inspection workflow, inspecting grouped parts while the robot continues running, allowing them to focus on value-added tasks.
“Custom automation and cast parts go hand in hand. Cast parts are usually custom shapes with loose tolerances and inconsistent finishes,” said CNC Solutions Mechanical Engineer Cole Keller. “We designed the gripper and tooling to handle anything the cast parts may throw at it, all while giving the customer a compact, long-queue cell that holds both part numbers and the possibility to add more in the future.”
Conclusion
The turntable automation cells from CNC Solutions enabled the customer to modernize its machine operation, improving throughput, quality, and operational efficiency while reducing reliance on manual labor. This turnkey solution highlights how custom robotic automation can transform high-mix CNC machining, particularly for challenging cast parts.
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