Displacement detecting system in a multi-axis measuring system, especially for use with a gear wheel grinding or inspecting machine

Claim 1

A displacement detecting system in a multi-axis measuring system containing measuring carriages respectively displaceable along a leading axis and at least one other axis in order to generate measuring pulses, especially for use with a gear wheel grinding or inspecting machine, comprising: a primary computer containing stored therein predetermined restarting points located on the leading axis; a number of channels corresponding in number to the number of said axes, each channel having a channel input; each of said channels containing a displacement detector comprising: a counter for counting a counted value corresponding to the displacement of an associated one of the measuring carriages; said counter defining an overflow value and having an output; a comparator having a predetermined bit capacity and an output for supplying a measurement initiating signal in order to detect a displacement position of at least one of said measuring carriages displaced along said at least one other axis when one of said restarting points is passed by the measuring carriage displaceable along the leading axis; the output of said comparator being connected to the channel input of the channel associated with the measuring carriage displaceable along said at least one other axis; a buffer store in which there is stored the counted value present in the counter at the moment when there occurs said measurement initiating signal; a counter bus connecting said output of said counter to said comparator and to said buffer store; a microprocessor system including control outputs; said microprocessor system being connected to said comparator and to said buffer store; a synchronizer circuit connected to said control outputs of said microprocessor system and provided with a plurality of synchronizer control outputs; and said plurality of synchronizer control outputs including three synchronizer control outputs respectively connected to said counter, to said buffer store, and to said microprocessor system, in order to block said counter each time prior to reaching said overflow value of the same, to transfer the contents of said buffer store containing the contents of said counter to said microprocessor system, to reset and to reactivate said counter until said counted value of said counter prior to reaching one of said restarting points does not amount to said overflow value of the counter and until said comparator, which has received from the microprocessor system the count remaining up to said restarting point and lying within said bit capacity of said comparator, delivers said measurement initiating signal when said remaining count conforms with a latest count counted by said counter.