By Peter Smid
Over its first variations, this best-selling e-book has turn into the de facto general for education and reference fabric in any respect degrees of CNC programming. utilized in hundreds of thousands of academic associations around the globe because the fundamental textual content for CNC classes, and used day-by-day via many in-field CNC programmers and desktop operators, this booklet actually defines CNC programming. Written with cautious awareness to element, there are not any compromises. a few of the adjustments during this new 3rd variation are the direct results of reviews and recommendations obtained from many CNC execs within the box. This terribly finished paintings is still choked with over a thousand illustrations, tables, formulation, tips, shortcuts, and functional examples.
The enclosed CD-ROM now encompasses a absolutely useful 15-day shareware model of CNC software direction editor/simulator, NCPlot™. This robust, easy-to-learn software program comprises an grand array of positive aspects, many no longer present in aggressive items. NCPlot bargains an unequalled mixture of simplicity of use and richness of positive aspects. help for lots of complicated keep watch over concepts is general, together with a macro interpreter that simulates Fanuc and related macro programs.
The CD-ROM additionally bargains many education routines in response to person chapters, in addition to recommendations and particular causes. exact programming and machining examples are supplied besides, in type of whole laptop records, important as genuine programming assets. nearly all documents use Adobe PDF structure and are set to excessive answer printing.
- absolutely practical shareware model of CNC toolpath simulator/editor, NCPlot(TM), integrated at the CD-ROM. This robust software program comprises an grand array of good points, together with these now not present in aggressive items. help for plenty of complicated beneficial properties is regular, and the incorporated macro interpreter can simulate Fanuc and suitable macro toolpath programs
- Detailed part on CNC lathes with stay tooling, together with examples
- Image records of many real components, used as examples
- extra programming examples (both in revealed textual content and at the CD-ROM)
- Optimized for the newest Fanuc and comparable keep an eye on systems
- Additional formulation, calculations and convenient reference material
- Fourth axis programming (indexing and rotary)
- CD-ROM established initiatives, together with numerous as interactive PDF forms
- Improved index for higher seek of topics
Read or Download CNC programming handbook : a comprehensive guide to practical CNC programming PDF
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Additional info for CNC programming handbook : a comprehensive guide to practical CNC programming
It may be a setting of between 0 and 100%. The default setting is also the most logical - usually 10% of the maximum rapid traverse rate. This setting should never be higher than 25% and can be done only through setting of a system parameter. Make sure that all persons who work on such a machine are aware of the changes. CONTROL SYSTEM u Spindle Speed Override The same logic used for the application of rapid rate override can be used for the spindle speed override. The required change can be established during actual cutting by using the spindle speed override switch, located on the machine control panel.
For milling controls, the feedrate is programmed in in/min or m/min. For lathe controls, the feedrate is programmed in in/rev or in mm/rev. Feedrate per minute on lathes is used only in cases when the spindle is not rotating and the feedrate needs to be controlled. 01 + where . . Fn = Optimized - or NEW - feedrate Fp = Originally programmed feedrate p = Percentage of feedrate override Feedrate can be overridden within a large range, typically from 0% to 200% or at least 0% to 150%. When the feedrate override switch is set to 0%, the CNC machine will stop the cutting motion.
Another example is a parameter setting that stores the maximum feedrate for each axis, the maximum spindle speed, etc. Such values must never be set higher than the machine itself can support. 001° increment, just because the parameter is set to a lower value, even if it is possible. Such a setting is wrong and can cause serious damage! To better understand what CNC system parameters can do, here is an abbreviated listing of parameter classification for a typical Fanuc control system (many of them are meaningful to the service technicians only): Parameters related to Setting Parameters related to Axis Control Data Parameters related to Chopping Parameters related to the Coordinate System Parameters related to Feedrate Parameters related to Acceleration/Deceleration Control Parameters related to Servo Parameters related to DI/DO Parameters related to MDI, EDIT, and CRT Parameters related to Programs Parameters related to Serial Spindle Output Parameters related to Graphic Display Parameters related to I/O interface Parameters related to Stroke Limit Parameters related to Pitch Error Compensation Parameters related to Inclination Compensation Parameters related to Straightness Compensation Parameters related to Spindle Control Parameters related to Tool Offset Parameters related to Canned Cycle Parameters related to Scaling and Coordinate Rotation Parameters related to Automatic Corner Override Parameters related to Involute Interpolation Parameters related to Uni-directional Positioning Parameters related to Custom Macro (User Macro) Parameters related to Program Restart Take care when changing control system parameters !