Makino EDNC 8 – Sinker EDM
The EDNC8 is the second machine in the EDNC-Series line-up. It provides larger X/Y/Z strokes and additional processing capacity over the EDNC6. The EDNC8 is packed with high-performance features for optimum productivity. The user-friendly Hyper-i control system intelligently streamlines operations to achieve the most efficient results regardless of operator skill level. The operator’s needs are fully supported by the Hyper-i system through the integrated EDM Assist (on-board digital manuals and training system) and advanced E-Tech Doctor help functions. The intuitive and graphical nature of the Hyper-i control enables operators to harness the advanced Makino HyperCut and SuperSpark™ IV technologies for the most productive and efficient results.
The EDNC8 can be configured with additional options that impact performance. The HS-Rib Z-axis option provides high-speed jump motions up to 20m/min with 1.5G acceleration, and can reduce machining times by up to 60 percent. Precision depth control is maintained by the HS-Rib through integral liquid core cooling of the ballscrew. This significant level of performance matches the speed and accuracy capability achieved by smaller machines on a much bigger machine platform. An optional ATC (automatic tool changer) system is also available that extends unattended machine operations while permitting full use of the entire machine stroke and work tank area.
The EDNC8 is offered in two configurations with different work tank sizes. The standard EDNC8 supports workpiece sizes up to 55.1” x 35.4” (1,400mm x 900mm) and utilizes a three-sided programmable rise–and-fall work tank. The wide-tank version accommodates larger parts up to 70.8” x 47.2” (1,800mm x 1,200mm), and uses a programmable rise-and-fall front door. Both EDNC8 models utilize a stationary worktable and space-saving design that enhance thermal stability by integrating the dielectric reservoir into the base casting of the machine. In addition, the operator is provided with excellent access to the work zone for easy part setups and operational viewing. The combined features and technologies that are embedded into the EDNC8 machine make it a reliable and powerful tool that can efficiently tackle any application.
• HyperCut: This special generator setting provides improvement to machining speeds without increasing electrode wear or required electrode reduction amount. HyperCut can be used on part details up to 30 amps, and improves machining speeds by up to 30 percent without affecting surface quality.
• SuperSpark™ IV: This family of technologies utilizes dynamic power supply adjustments and jump motion control during the machining process. It enhances automation and unattended operation capabilities by eliminating the need for external flush lines and increases the control’s ability to maintain higher cutting speeds regardless of the application or operator’s experience level. Reduction in rough machining cycle times can be achieved when using SuperSpark™ technology regardless of the shape, size or depth of cavity.
• ArcFree: This set of safety-focused settings virtually eliminates the possibility of the machine developing destructive DC arcs during the course of a burn. ArcFree technology, coupled with Makino’s extremely fast servo control response time, enables safe, unattended burning, even when the current applied to an electrode exceeds its maximum current density. While arc prevention has been a part of all modern sinker EDMs, ArcFree technology is the next advancement in intelligent adaptive controls for prevention of DC arcs.
• Flower pattern: Special conditions were developed to obtain a uniform Ra value surface finish with a large RSm value to improve the performance of mold release for plastic injection tools. The more open structure of the surface finish improves plastic part mold release and tool life while reducing the interval for mold cleaning maintenance.
• HQSF™ (High-Quality Surface Finish): This optional configuration dramatically improves the produced surface finish of tool steels using copper or graphite electrodes. The technology was specifically designed to eliminate post-machine polishing and produce superior metallurgical results that extend tool life. Makino’s HQSF process uses a special µSC powder additive that is mixed in the dielectric oil that enhances the stability and even disbursement of the machining spark energy. HQSF can also provide cycle time reductions when not machining to ultra-fine surface finishes.
• EDcam™ software: Makino has developed an off-line programming system for Ram EDM that makes use of the electrode and work piece CAD model information. The system eliminates the requirement of having to create paper process sheets for manual data entry of the programs on the machine control, which invite critical human errors. By intelligently utilizing available electronic data, the EDcam software brings the Ram EDM process into the 21st century and provides a means of program simulation and verification without the need for time-consuming, on-machine, dry-run operations.
• Remote machine monitoring: As part of efficient unattended machine operation, operators and supervisors alike may wish to monitor the machining progress while away from the machine. Makino offers two software options that provide a means of process updates. The EDM mail option enables the machine to generate e-mail text-based messages on any alarm/stop status or by timed intervals. The EDM viewer option provides direct viewing of the machine control interface on a remote PC.
