Synchronous control device
First Claim
1. A synchronous control device synchronously controlling at least two movable axes, having one movable axis as a reference, and at least one other movable axis as a synchronized axis, comprising:
- position detector to constantly determine the position of each movable axis;
storage to store information on the synchronous relationship between the positions of the movable axes subject to synchronous control, an allowable displacement, and an operation to be executed when the allowable displacement is exceeded;
displacement detector to detect whether or not the relationship between the positions of the respective movable axes determined by said position detector is within the range of said allowable displacement; and
abnormal time operation unit to execute said operation to be executed when the allowable displacement is exceeded, when said displacement detector detects that the relationship between the positions of the respective movable axes exceeds said allowable displacement.
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Accused Products
Abstract
An ‘interval’ in which the synchronization status between the movable axes subject to synchronous control is monitored, an equation between the movable axes in the ‘interval’, and an ‘allowable displacement’ for the positional relationship obtained with this equation and the actual positional relationship are set in advance. The ‘start condition’ and ‘termination condition’ for synchronous status verification processing are set with the master position and the like. When the start condition for synchronous status verification processing is satisfied, it is detected whether or not the actual position and the position obtained with the equation are within the range of the allowable displacement based on the position of the movable axes. If not within the range of the allowable displacement, operation set as ‘operation to be executed when the allowable displacement is exceeded’ is executed.
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Citations
16 Claims
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1. A synchronous control device synchronously controlling at least two movable axes, having one movable axis as a reference, and at least one other movable axis as a synchronized axis, comprising:
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position detector to constantly determine the position of each movable axis; storage to store information on the synchronous relationship between the positions of the movable axes subject to synchronous control, an allowable displacement, and an operation to be executed when the allowable displacement is exceeded; displacement detector to detect whether or not the relationship between the positions of the respective movable axes determined by said position detector is within the range of said allowable displacement; and abnormal time operation unit to execute said operation to be executed when the allowable displacement is exceeded, when said displacement detector detects that the relationship between the positions of the respective movable axes exceeds said allowable displacement. - View Dependent Claims (2, 3, 4)
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5. A synchronous control device synchronously controlling at least two movable axes, having one movable axis as a reference, and at least one other movable axis as a synchronized axis, comprising:
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position detector to constantly determine the position of each movable axis; storage to store at least one set of information on the synchronous relationship between the positions of the movable axes subject to synchronous control, allowable displacement, a synchronous relationship verification start condition, a synchronous relationship verification termination condition, and an operation to be executed when the allowable displacement is exceeded; a selector to select one set of information from the information stored in said storage; synchronous relationship verification start determiner to determine whether or not the verification start condition for synchronous relationship of the information selected with said selector has been satisfied; displacement detector to detect whether or not the relationship between the positions of the respective movable axes determined by said position detector is within the range of said allowable displacement after verification of the synchronous relationship has started with said synchronous relationship verification start determiner; abnormal time operation unit to execute said operation to be executed when the allowable displacement is exceeded, when said displacement detector detects that the relationship between the positions of the respective movable axes exceeds said allowable displacement; and synchronous relationship verification termination unit to determine whether or not the termination condition for synchronous relationship verification is satisfied after verification of the synchronous relationship has started, and to terminate verification as to whether or not the synchronous relationship is in the normal status when the termination condition is satisfied. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification