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3-6-4 Origin Compensation and Origin Shift
H Functions
• Both origin compensation and origin shift functions match the mechanical origin and the Cam Posi-
tioner origin.
• The differences between origin compensation and origin shift are outlined as follows:
Origin Compensation
Press the ADJ switch in SET mode to set the present angle at that point to zero. If an origin com-
pensation value has been set, the present angle will change to that origin compensation value. This
value (the origin position after compensation for the Resolver’s electrical 0°) will not be lost even if
the power is turned OFF.
Origin Shift
Turn ON the origin shift input (TRIG) in RUN mode to set the present angle at that point to zero. If an
origin compensation value has been set, the present angle will change to that origin compensation
value. This value will be lost if the power is turned OFF.
• Origin compensation is used to align the mechanical origin and the Cam Positioner origin, for exam-
ple, when the system is first introduced, when the system is adjusted, or when Resolvers or Cam Posi-
tioners are exchanged.
Origin shift is used during normal operation when the present angle (origin) is to be changed.
• Both origin compensation and origin shift functions are enabled when the Resolver speed is less than
4 r/min. Neither function will be executed when the Resolver speed is 4 r/min or greater.
• The absolute angle will be flashing in the POSITION/OFF display during execution of origin com-
pensation or origin shift.
Note 1. When origin compensation values have been set, turn OFF the power supply to the Cam Posi-
tioner, turn it ON again and then execute origin compensation or origin shift. The origin com-
pensation value is enabled once the power has been turned ON again. If origin compensation
or origin shift are executed without the power being turned OFF and then ON again, the origin
compensation or origin shift function will not be executed properly.
Note 2. When origin shift has been used to change the origin position, the origin position value will be
lost when the power is turned OFF. The present angle after the power is turned ON again will,
therefore, be different from the present angle before the power was turned OFF and the cam
output timing will be out of synch. When using origin shift, stop the machinery and turn ON the
power supply while the START input is OFF. Execute origin shift at the correct position and
then turn ON the START input and start the machinery operation.
H Example Operation
• When the origin compensation value is “0” (resolution: 360)
102100 101 103 104 105 106
Present angle before
compensation
Y Execution position for origin
compensation/origin shift
359357 358 0123
Present angle after
compensation
Operation Chapter 3
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