Program Examples:Camming by Virtual Master

Introduction

Slave axis is driven by a virtual(simulated) master axis

Setup

Both master and slave axes are set as in previous examples

Creating Cam Table

Declaring a cam-table type global variable:

common shared CamTable1 as cam

Creating an empty cam table:

• This table is not cyclic:

    CamTable1.Cycle = 1 

• Not linked to anything other cam-tabels:

    CamTable1.Next = none
    CamTable1.Prev = none

• making it 10000 points

  dim camsize as long = 10000
  createcamdata camsize CamTable1

• Defining a 360 deg sine table:

  for i = 1 to CamTable1.Size 
    CamTable1.MasterData [i] = 360*(i-1)/CamTable1.Size ' Master in degrees
    CamTable1.SlaveData  [i] = cam_amplitude *sin (CamTable1.MasterData [i] * pi/180)
  next

• Store the created file onto flash disk:

  storecamdata ct1.cam CamTable1   

Once the table is stored on the flash it can be re-loaded as:

  loadcamdata ct1.cam CamTable1

Crating master-slave relationship

    a2.MasterSource = a1.PExt 
    a2.GearRatio = 1.0
    a2.CamOffset = 0 
    a2.FirstCam  = CamTable1 
    a2.slave     = cam