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Run-time interpretation of STEP-NC: implementation and performance

机译:STEP-NC的运行时解释:实现和性能

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摘要

This paper describes an experiment in building and running two STEP-NC interpreters for milling operations: one using ISO 14649, the other using AP 238 of ISO 10303. Both use STEP part 21 exchange files as input and call low-level machine control functions. Both include tool path generators and have sufficient functionality to execute the first example program at the end of part 11 of ISO 14649. The objectives and results were: (1) to determine if ISO 14649 and AP 238 contain sufficient information to run a machining centre (yes); (2) to determine whether AP 238 faithfully remodels the information in ISO 14649 for the functionality that was implemented (yes); (3) to determine whether real-time interpretation of STEP-NC is feasible (yes); (4) to determine the burden on systems programmers to build a STEP-NC interpreter (heavy); (5) to determine how interpretation time varies with file size (linearly for both interpreters); and (6) to compare the speed with which the two formats can be interpreted. Using currently available software tools, ISO 14649 can be interpreted significantly faster, but both interpreters are so fast that interpretation time is negligible compared with running time.
机译:本文描述了一个构建和运行两个用于铣削操作的STEP-NC解释器的实验:一个使用ISO 14649,另一个使用ISO 10303的AP238。两者都使用STEP part 21交换文件作为输入并调用低级机器控制功能。两者都包括刀具路径生成器,并且具有足够的功能来执行ISO 14649第11部分末尾的第一个示例程序。目标和结果是:(1)确定ISO 14649和AP 238是否包含足够的信息来运行加工中心(是); (2)确定AP 238是否为实现的功能忠实地重塑了ISO 14649中的信息(是); (3)确定STEP-NC的实时解释是否可行(是); (4)确定系统程序员构建STEP-NC解释器的负担(繁重); (5)确定口译时间如何随文件大小变化(两个口译员都是线性的); (6)比较两种格式的解释速度。使用当前可用的软件工具,ISO 14649的解释速度可以大大提高,但是两个解释器的速度都非常快,因此与运行时间相比,解释时间可以忽略不计。

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