mpiAxisOriginGet

Declaration

long mpiAxisOriginGet(MPIAxis  axis,
                      double   *origin)

Required Header: axis.h

Description

mpiAxisOriginGet gets the value of the origin of an Axis (axis) and writes it into the location pointed to by origin.

axis a handle to the Axis object.
*origin pointer to the Origin value returned by the method
Return Values
MPIMessageOK

Sample Code 


/* Set axis actual position to be zero by changing origin */
void zeroPosition(MPIMotion   motion,
                  MPIAxis     axis)
{  
   double            actualPosition;
   double            commandPosition;
   double            originValue;
   long              returnValue;
   
   returnValue =
      mpiMotionPositionGet(motion,
                           &actualPosition,
                           &commandPosition);
   msgCHECK(returnValue);
      
      /* Always do a ConfigGet before a ConfigSet */
   returnValue =
        mpiAxisOriginGet(axis,
                         &originValue);
   msgCHECK(returnValue);
 
   returnValue =
        mpiAxisOriginSet(axis,
                         originValue+actualPosition);
   msgCHECK(returnValue);
      /* Now actual position is 0 */
}

See Also

mpiAxisOriginSet | Using the Origin Variable | Controller Positions