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Siemens' newest solution for the job shop floor, the Sinumerik 808D, is a CNC for entry-level milling and turning machines. With up to three-axis plus spindle control capability in milling or turning applications, the 808D is offered as a package with Siemens Sinamics drives and Simotics motor solutions. The Sinumerik 808D is available for OEM machine tool builders and in-the-field retrofit installation by Siemens business partners worldwide.
For machine tool builders, start with an IP 65 enclosure, easy-to-load USB port, mechanical, hot and soft keys for easy, intuitive operation, clamp-mounted front panel and a modular design that allows customizing by machine model or with out-of-the-box operation. Plus, the machine control panel is connected using plug-and-play technology using a simple USB interface. On a turning machine, the Sinumerik 808D reportedly provides high contour accuracy and maximum machine productivity on high-volume production runs. On a milling machine, likewise, the Sinumerik 808D offers machine builders of vertical machining centers all the benefits of the Siemens MDynamics velocity control for mold and die section work.
A 7.5-inch LCD color display with 640 x 480 resolution for easy reading, selectable function keyboard, rotary dials for speed and spindle override, LED tool number display, durable buffer battery and rear connection ports for USB, RS232 C, distributed and onboard I/O, setpoint to feed axes and spindle, spindle encoder, fast I/O, e.g., for probes and handwheel operation are all standard on the Sinumerik 808D.
With 80-bit nano floating point accuracy and intelligent jerk limitation for smoother path cutting and less mechanical stress on the machine structures, workpiece accuracy and repeatability are improved. Whether turning with a C-axis changeover or milling mold sections where path control is paramount, the Sinumerik 808D has been designed to significant heighten the performance level of basic machine tools.
With programGuide Basic, a wide range of pre-determined technology cycles is available, in addition to the standard G-code and coordinate transformation language. Standard ISO codes can also be intermixed with high-level Sinumerik CNC commands on the 808D. The onboard contour computer further allows complex programs to be created and modified at the CNC without the need for a CAD/CAM system.
For routine or even online help with maintenance or troubleshooting issues, a simple push of a button is the only requirement, as the complete library of system parameters is accessible onscreen. Commissioning is made easier with a ready-to-run PLC program. Customizing the PLC is simpler, as well, with function and data blocks for program testing and debugging built-in. The Sinumerik 808D further allows easy connection to the PLC I/O of other machine devices, whether proximate or remote. The open architecture of Siemens CNC has not been sacrificed on the 808D, so customized HMI screens and menu trees are easily defined and created.
Finally, with Manual Machine Plus (MM+) function on this new CNC enables transition from conventional machining to CNC programming. A machine equipped withmm+ can be operated using handwheels but with all the benefits of CNC-assisted technology cycles.
For end users, in addition to the above features and benefits for the machine builder, shop operators and programmers alike will appreciate the Sinumerik 808D for its many end-user advantages, including simplified keyboard entry of all program values, named part programs in subfolders just like a PC, convenient shortcut keys to access tool offset lists or the Program Manager, intelligent jog features easily identified and graphically-supported, precise tool handling and tool wear data readily available onscreen and a powerful simulation routine.
An operator can access all system information and obtain online help, whenever needed. The multimedia training materials include on-screen tutorial video and full step-by-step procedures to go from the blueprint to the finished part. For offline training, a fully operable software machine control panel on a PC is available to end users.
Related Glossary Terms
- centers
centers
Cone-shaped pins that support a workpiece by one or two ends during machining. The centers fit into holes drilled in the workpiece ends. Centers that turn with the workpiece are called “live” centers; those that do not are called “dead” centers.
- computer numerical control ( CNC)
computer numerical control ( CNC)
Microprocessor-based controller dedicated to a machine tool that permits the creation or modification of parts. Programmed numerical control activates the machine’s servos and spindle drives and controls the various machining operations. See DNC, direct numerical control; NC, numerical control.
- feed
feed
Rate of change of position of the tool as a whole, relative to the workpiece while cutting.
- gang cutting ( milling)
gang cutting ( milling)
Machining with several cutters mounted on a single arbor, generally for simultaneous cutting.
- milling
milling
Machining operation in which metal or other material is removed by applying power to a rotating cutter. In vertical milling, the cutting tool is mounted vertically on the spindle. In horizontal milling, the cutting tool is mounted horizontally, either directly on the spindle or on an arbor. Horizontal milling is further broken down into conventional milling, where the cutter rotates opposite the direction of feed, or “up” into the workpiece; and climb milling, where the cutter rotates in the direction of feed, or “down” into the workpiece. Milling operations include plane or surface milling, endmilling, facemilling, angle milling, form milling and profiling.
- milling machine ( mill)
milling machine ( mill)
Runs endmills and arbor-mounted milling cutters. Features include a head with a spindle that drives the cutters; a column, knee and table that provide motion in the three Cartesian axes; and a base that supports the components and houses the cutting-fluid pump and reservoir. The work is mounted on the table and fed into the rotating cutter or endmill to accomplish the milling steps; vertical milling machines also feed endmills into the work by means of a spindle-mounted quill. Models range from small manual machines to big bed-type and duplex mills. All take one of three basic forms: vertical, horizontal or convertible horizontal/vertical. Vertical machines may be knee-type (the table is mounted on a knee that can be elevated) or bed-type (the table is securely supported and only moves horizontally). In general, horizontal machines are bigger and more powerful, while vertical machines are lighter but more versatile and easier to set up and operate.
- modular design ( modular construction)
modular design ( modular construction)
Manufacturing of a product in subassemblies that permits fast and simple replacement of defective assemblies and tailoring of the product for different purposes. See interchangeable parts.
- turning
turning
Workpiece is held in a chuck, mounted on a face plate or secured between centers and rotated while a cutting tool, normally a single-point tool, is fed into it along its periphery or across its end or face. Takes the form of straight turning (cutting along the periphery of the workpiece); taper turning (creating a taper); step turning (turning different-size diameters on the same work); chamfering (beveling an edge or shoulder); facing (cutting on an end); turning threads (usually external but can be internal); roughing (high-volume metal removal); and finishing (final light cuts). Performed on lathes, turning centers, chucking machines, automatic screw machines and similar machines.
- turning machine
turning machine
Any machine that rotates a workpiece while feeding a cutting tool into it. See lathe.
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