Case Study: Converting Legacy Cast-Head Dual-Ended Spindles to Automatic Tool Changers (ATC)
CNC Parts Dept, Inc can convert your Motionmaster or DMS dual-ended spindle to ATC without replacing the head. Discover how CNCPD field retrofits maximize throughput.
Many shops operate legacy 3-axis and 5-axis Motionmaster or DMS machines equipped with dual-ended spindles on rigid cast iron head assemblies. For simple setups like rotational molding trimming or basic two-tool cutting, this configuration remains a highly reliable, purpose-built solution. However, when production needs evolve to require three or more tools, manual tool changes and height measurements quickly limit daily throughput, especially when modern multi-tool automation is required.
While converting a rigid cast head to an Automatic Tool Changer (ATC) is widely considered a significant structural challenge, CNC Parts Dept., Inc. has developed a reliable, non-invasive method. We have engineered a field-retrofit process that converts legacy Motionmaster and DMS dual-ended spindles into modern, high-efficiency ATC systems without replacing the core head casting. This allows you to scale your existing, reliable machinery to handle complex, multi-tool manufacturing.
The Challenge: Why Other Rebuilders Give Up
Upgrading a rigid cast iron head to a modern ATC spindle presents complex alignment hurdles that standard repair shops struggle to solve:
Fixed Mechanical Alignment
Original cast heads were bored for specific spindle diameters, making it difficult to align wider ATC housings and pneumatic drawbars with the Z-axis.
Weight and Balance Changes
ATC spindles require supplementary pneumatic logic, tool sensors, and safety interlock handshakes that old machinery was never designed to route.z
Complex Infrastructure Demands
ATC spindles require supplementary pneumatic logic, tool sensors, and safety interlock handshakes that old machinery was never designed to route.
Rather than forcing costly and structurally risky physical modifications that keep your machine down for weeks, CNC Parts Dept., Inc. bypassed these obstacles using software intelligence.
The CNCPD Solution: Advanced Software Alignment (TCP)
When fitting a modern ATC spindle into the original cast head, the physical mounting limits prevent the spindle from sitting on the head’s exact mechanical center of rotation. Instead of fighting the iron with invasive machining, CNC Parts Dept., Inc. uses a highly elegant, non-invasive engineering standard. We utilize advanced Tool Center Point (TCP / RTCP) software integration.
By calculating the exact physical offset of the new spindle and entering these values directly into the controller’s configuration, the machine mathematically compensates for the offset in real-time. As the head rotates, the controller dynamically shifts all coordinate positions, keeping the tool tip perfectly on-path with uncompromised accuracy. Because we bypass the need for physical structural modifications, this high-efficiency conversion is unlocked by utilizing a TCP-capable controller.
Completing the System: Automated Tool Racks & Height Setters
To deliver a truly hands-off, automated experience, a spindle upgrade must be supported by the proper local infrastructure. CNC Parts Dept., Inc. integrates complete support systems alongside the spindle retrofit:
- Custom Tool Racks & Carousels: We design and mount custom tool holding racks or rotary carousels directly to your machine’s bed or bridge, customized to your tool capacity needs.
- Integrated Tool Height Setters: To eliminate manual touch-offs entirely, we install and integrate automatic tool touch-off sensors (height setters). The controller automatically measures and updates tool offsets during active programs.
The Turn-Key Upgrade: Fagor Automation Integration
Because advanced Tool Center Point (TCP) tracking and tool management are the keys to bypassing physical casting limitations, a factory-authorized Fagor Automation control retrofit is the natural, turn-key companion to this spindle upgrade on Motionmaster and DMS platforms.
By retrofitting your machine with a modern Fagor 8060 or Fagor 8065 CNC system, you unlock:
Native TCP/RTCP Kinematics
Built-in algorithms dynamically manage head centricity, ensuring incredible physical accuracy without the risk of machining the cast head.
Automated Tool & Carousel Management
Seamlessly track tool offsets, monitor active tool wear, and coordinate complex tool setter measurements automatically.
Industrial Reliability
Replace old floppy disks or unreliable RS-232 serial lines with modern touchscreens, USB, and high-speed network connectivity.
Performance Component Alignment: Upgrades Available at CNCPD.com
To complement this control system overhaul, updating the critical supporting hardware on your industrial router is essential. CNC Parts Dept stocks the specialized, industrial-grade components required to support these modern transitions. For other machinery brands where our turnkey integration team is not on-site, we can supply these premium components for your internal team to install:
- High-Dynamic VFDs (Variable Frequency Drives): Modern ATC spindles require advanced vector control drives capable of executing rapid deceleration and precise spindle orientation to receive the tool holder safely.
- Heavy-Duty Servo Drives and Motors: Upgraded motion components ensure your axes can handle the dynamic speed transitions of moving to and from a tool changer rack.
- Pneumatic Control Valves and Solenoids: We stock high-flow manifolds and valves to manage tool release cycles, taper-clean air blowers, and safety verification sensors.
Watch the Transformation in Action
View our Motionmaster ATC Retrofit Video demonstration to see exactly how a legacy machine operates once it is upgraded to an ATC system with an integrated tool rack and height setter. Watch the mechanical precision and seamless tool-changing execution of our latest conversion.
Ready to Revitalize Your Machine?
Don’t spend hundreds of thousands of dollars replacing a rigid, high-quality machine frame that has decades of life left in it. Our experienced CNC router technicians and retrofit engineers can design, build, and integrate an ATC, tool rack, height setter, and Fagor control retrofit tailored specifically to your Motionmaster or DMS machine.
Contact our Technical Support today to schedule an engineering consultation, submit your machine details, or request a comprehensive quote on our Fagor Control and ATC Retrofit services.