ProSpur+ is a professional program designed to create drawings of spur gears.The drawings are produced as symbols for the ProCAD+ Computer Aided Design package for use on Acorn RISC computers. The shape of a gear is not easy to draw as it involves what are known as involute curves. ProSpur+ can not only produce these curves, it can actually produce isometric projections of them so that exploded gearboxes can be drawn very quickly. Elevations and crosssections are also provided. This guide assumes that the user is familiar with gears and the terms involved, and also is conversant with the use of the ProCAD+ program. The guide has been written to conform to the style and layout of the ProCAD+ manual in order to reduce the learning time. A glossary appears towards the end of the guide to explain some of the gear terms. A full explanation of the terms used by gear manufacturers can usually be found in most good machinery handbooks. As supplied, ProSpur+ creates gears according to British practice, but it may be customized to work to any other standard. A section of the manual is dedicated to customizing the program to fit specific requirements. ProSpur+ fully supports the Help utility in order to provide extra information on the use of the various icons on the main dialogue box.

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