Better Safer production

A CNC machine does not requir any positioning of the spindle to be made by hand during production.The operator's main job is to monitor the maching process and make any needed corrections.Most machine feacture at least one instantly halt productionshould a part processing error occour.

Incresed productivity

A CNC may also be programmed to alow for wood grain,material type and speciall cutter requirments.Human are not able to balanceall of these factors in a repeated way over extended period of time.Machine may work two or three shifts per day without shut down.The only limiting factor in CNC production relate material availability and cutter wear.

Better production parts

No human hope to control the movement of the machineas precisely as a CNC.These machine use with very small units of measure.A CNC is able to drill a hole at one end of the work table,move to the far corner and return to make the same hole again with only a ten-thousand of an inch errer.The accuracy of CNC an be explane this way take a hair of your head and slice it thelong way six times.The silver you have left is about the margin of error with the machine.

Lower labour requirment

A CNC machine can eliminate several prossesin steps.Where once a sheet of material would move from one production machine step to another,the CNC machine can do more operations in one set-up.Full sheet of material may be used rather than "pre blanking" on a saw or other machine.One operation can the jobs of several people.

dvantages of CNC productions

1. Lower labour requirements.
2. Better production parts.
3. Incresed productivity.
4. Better safer production.

Modern CNC systems

In modern CNC system,and to end componentdesign is highly automatedusing CAD/CAM programs.The programme produce a computer file that is interprited to extract the commands needed to operate a particuler,and thenloaded in to CNC machine for production.

Tools with CNC variant

1. Drills
2. EDMs
3. Lathes
4. Milling Machines
5. Sheet metal works
6. Wire bending machines
7. Hot wire foam cutters
8. Plasma cutters
9. Water jet cutters
10. Laser cutter
11. Surface Grinder
12. 3D printing

Ealier forms of automation

• Cams
• Trace Control

Definition of CNC machines

The automation of machine tools that are operated by abstractly programmed commands encoded on storage medium,as opposed to manually controled viahandwheels or leavers, or machinecally automated via cam alone.

Turret punch press machines

Turret Punch Press’
An Engineeringtalk guide
Start with the news release In-Sight protects TNT's injection-moulding tools from Cognex, which we summarised at the time by saying "TNT Plastic Molding has used a monitoring system developed by Ask Technologies and Cognex to prevent damage to its injection-moulding tools.". Several months prior to that, we featured the news release 2D Data Matrix code provides complete traceability from Cognex: "Innovative Automation, a certified systems integrator for Cognex, has implemented a 2D Data Matrix code to provide complete traceability in a handpass assembly system.". In January 2010, we covered the news from Saint-Gobain Performance Plastics Rencol - take a look at De-coupling effects suppress CVT noise which says: "Saint-Gobain Performance Plastics Rencol discusses how de-coupling effects of tolerance rings help suppress CVT noise. ".

Milling machines

A milling machine is a machine tool used to machine solid materials. Milling machines exist in two basic forms: horizontal and vertical, which terms refer to the orientation of the cutting tool spindle. Unlike a drill press, in which the workpiece is held stationary and the drill is moved vertically to penetrate the material, milling also involves movement of the workpiece against the rotating cutter, the latter of which is able to cut on its flanks as well as its tip. Workpiece and cutter movement are precisely controlled to less than 0.001 in (0.025 mm), usually by means of precision ground slides and leadscrews or analogous technology. Milling machines may be manually operated, mechanically automated, or digitally automated via computer numerical control (CNC).
Milling machines can perform a vast number of operations, some very complex, such as slot and keyway cutting, planing, drilling, diesinking, rebating, routing, etc. Cutting fluid is often pumped to the cutting site to cool and lubricate the cut, and to sluice away the resulting swarf.

Lathe Machines

A lathe (pronounced /ˈleɪð/) is a machine tool which spins a block of material to perform various operations such as cutting, sanding, knurling, drilling, or deformation with tools that are applied to the workpiece to create an object which has symmetry about an axis of rotation.
Lathes are used in woodturning, metalworking, metal spinning, and glassworking. Lathes can be used to shape pottery, the best-known design being the potter's wheel. Most suitably equipped metalworking lathes can also be used to produce most solids of revolution, plane surfaces and screw threads or helices. Ornamental lathes can produce three-dimensional solids of incredible complexity. The material can be held in place by either one or two centers, at least one of which can be moved horizontally to accommodate varying material lengths. Other workholding methods include clamping the work about the axis of rotation using a chuck or collet, or to a faceplate, using clamps or dogs.
Examples of objects that can be produced on a lathe include candlestick holders, cue sticks, table legs, bowls, baseball bats, musical instruments (especially woodwind instruments), crankshafts and camshafts.