Makino EDNC 20 – Sinker EDM
The EDNC20 Ram EDM machine delivers high-level machining performance in a large-capacity machine. When equipped with the HS-Rib high-speed Z-axis, the EDNC20 can achieve jump motions up to 20m/min over its 31.5” (800mm) stroke. This level of jump capability achieves up to a 60 percent reduction in cycle time when compared to traditional processes and equals the performance of much smaller machines. The HS-Rib structure utilizes core-cooled ballscrew construction to achieve and maintain high-accuracy depth control over continuous hours of operation. ATC (automatic tool changer) options promote efficient unattended machine operation and sit outside the work tank to minimize processing restrictions.
The EDNC20 EDM machine provides generous X/Y/Z stroke capabilities of 78.7” x 27.6” x 23.6” (mm x mm x mm?), and supports work piece sizes up to 110” x 63” (mm x mm?). There are also extended stroke and extended work tank versions available that offer even larger capacities with 7.9” (200mm) of additional X-axis stroke and 11.8” (300mm) of additional Y-axis stroke, accommodating parts up to 110” x 71” (2,800mm x 1,800mm). All EDNC20 configurations utilize a stationary worktable design with a programmable rise-and-fall front door system that offers open access for part setups and supports parts weighing up to 22,000 lbs. (10,000kg). The machine’s structure applies a space-saving design that incorporates the dielectric reservoir into the base casting, which also improves overall thermal stability.
The EDNC20 with the Hyper-i control contains many practical advanced functions that assist the operator with programming and machine operation. With its intuitive graphical interface and modern hi-definition 24” class touch screen, it marks a new level of user-friendly operation. Operators will find many helpful and time-saving on-board tools, such as digital manuals and E-Tech Doctor functions, providing advanced support to operators of all skill levels. With its ease of use and flexibility, the Hyper-i control system channels the power of Makino’s advanced HyperCut and SuperSpark™ IV technologies to deliver the most efficient and productive results.
• 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.
