Lead screw or gear tooth form gauge - uses carriage driven feeler gauge to transfer digital angle and linear displacement signals to subtraction unit, amplifier and plotter

摘要

The measurement unit for the development of form shapes and angular direction indices in a lead screw uses an adjustable carriage (10) driven by a drive element (9) at one end. Another drive unit (1) is applied to an angular rotation counter (3) and to the lead screw (or gear wheel)(2) under test. A feeler gauge (31) is coupled to a moving nut (11) on the moving carriage and to a linear displacement gauge (12) on a scale unit. Electrical signals (a, b) are picked up from the rotation counter (3) and linear gauge (12) and transferred to further counters (5, 13) connected together to a difference counter (6), and a digital/analogue converter (7). The output of the latter, along with the feeler gauge signal are modified by a subtraction unit (14), amplifier (16) and plotter (17). The analogue signal is also used to control the movement of the carriage drive (9).