Technical data

Configuration
CPU 317T: Technology Functions
A5E00251798-03
4-91
Methods of cam disk definition
Both definition methods, i.e. by interpolation points or by polynomials, have their
advantages and disadvantages. Your application determines which one of these
methods meets requirements.
A combination of both methods in a cam disk is only possible in runtime by means
of FB MC_CamSectorAdd.
Definition based on interpolation points Definition based on polynomials
Advantage • Simple definition
• Any algorithms can be mapped by
interpolation points
• Curve creation assisted by teaching
• Simple interface to HMI
• Fewer data used for definition
• Standard transitions in accordance with
VDI...
• High-precision contour, constant
transitions
Disadvantage • Large number of interpolation points
required for smooth contour
• Complex arithmetic required for
calculation of coefficients
4.7.3 Creating cam disks with CamEdit
in the CamEdit dialog box you can
• call the VDI Wizard in order to define the cam disks,
• download or upload the cam disk definition in online mode,
• view the uploaded cam disk and apply it to the project
• view the basic shape of the cam disk (if scaling and offset were used.)