Weld control structure for and method of delaying initiation of a weld
First Claim
1. Weld control structure in combination with a source of single phase electrical welding energy and a resistance welder comprising, a voltage checker connected to the source of welding energy for checking the maximum value of the voltage of each cycle of the single phase source of electrical welding energy, a counter connected to the voltage checker for counting the number of cycles of the voltage which is checked and a central processing unit connected between the voltage checker and counter and the welder for receiving a weld request from the welder, initiating voltage checking for each cycle of the power source by the voltage checker and at the same time initiating counting by the counter of each cycle of voltage checked and initiating welding when either a preselected voltage has occurred at the source of electrical energy or a preselected number of counts has been counted without the preselected voltage occurring in the source of electrical energy.
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Accused Products
Abstract
A weld control structure and method for delaying initiating a weld until the voltage of a source of welding energy is at a preselected variable value or a variable preselected number of cycles a source of welding energy have occurred without the voltage reaching the preselected value and providing a fault indication when the weld is initiated as a result of the preselected number of cycles being reached without the voltage reaching the preselected voltage. The structure includes a voltage checker for checking the voltage in each cycle of a single phase source of electrical welding energy, a counter for counting each cycle of the energy source in which the voltage is checked after a weld is requested, a fault indicator and a central processing unit programmed to initiate a weld only when the voltage of the energy source has reached the preselected value or the counter has reached the preselected count without the voltage reaching the preselected value operably connected to the voltage checker, counter, fault indicator and welder. The method includes sensing the voltage in each cycle of a single phase welding energy source and initiating a weld when the voltage reaches a predetermined variable value or initiating a weld and energizing a fault indicator when a counter for counting the cycles of the energy source in which the voltage has been checked has reached a preselected variable member of counts without the voltage reaching the preselected value.
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Citations
16 Claims
- 1. Weld control structure in combination with a source of single phase electrical welding energy and a resistance welder comprising, a voltage checker connected to the source of welding energy for checking the maximum value of the voltage of each cycle of the single phase source of electrical welding energy, a counter connected to the voltage checker for counting the number of cycles of the voltage which is checked and a central processing unit connected between the voltage checker and counter and the welder for receiving a weld request from the welder, initiating voltage checking for each cycle of the power source by the voltage checker and at the same time initiating counting by the counter of each cycle of voltage checked and initiating welding when either a preselected voltage has occurred at the source of electrical energy or a preselected number of counts has been counted without the preselected voltage occurring in the source of electrical energy.
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5. Weld control structure for use between a welder and a source of welding energy comprising means connected to the source of welding energy for periodically checking a parameter of the welding energy available from the source of welding energy, after a weld request, means connected to the means for periodically checking a parameter of the available welding energy for delaying a requested weld until the parameter as checked during one of the periodic checks has reached a preselected value, means connected to the means for delaying a requested weld for initiating the requested weld on the parameter of the available welding energy reaching the preselected value during a single test, and means connected to the means for periodically checking a parameter of the welding energy for counting the number of checks of the welding energy parameter, said means for initiating the weld being operable on a preselected number of checks of the welding energy parameter, for initiating the weld even if the preselected parameter value of the welding energy has not been reached.
- 6. The method of controlling a weld comprising periodically checking a parameter of welding energy after a weld request delaying a requested weld until the parameter as checked during one of the periodic checks has reached a preselected value, counting the number of periodic checks, and initiating the weld in response to a preselected number of counts without the preselected value of the welding energy having been reached.
- 11. Weld control structure for use between a welder and a source of welding energy comprising means connected to the source of welding for periodically checking a parameter of the welding energy after a weld request, means connected to the means for periodically checking a parameter of the welding energy for delaying a requested weld until the parameter as checked during one of the periodic checks has reached a preselected value and means connected to the means for delaying a requested weld for initiating the requested weld on the parameter of the welding energy reaching the preselected value during a single test, and further including means connected to the means for periodically checking a parameter of the welding energy for counting the number of checks of the welding energy parameter and wherein the means for initiating the weld is also connected to the means for counting the number of checks of the welding energy parameter and includes means, operable on a preselected number of checks of the welding energy parameter for initiating the requested weld even if the preselected parameter value of the welding energy has not been reached.
- 14. The method of controlling a weld comprising periodically checking a parameter of welding energy after a weld request, delaying a requested weld until the parameter as checked during one of the periodic checks has reached a preselected value and initiating the weld in response to the value of the parameter of the welding energy reaching the preselected value during one of the periodic checks, and further, including the steps of counting the number of periodic checks and initiating the weld in response to a preselected number of counts without the preselected value of the welding energy parameter having been reached.
Specification