本文描述了一种用于水平定向触控触发探头的预行程模型。推导了基于力学原理的触发力模型，并利用该模型建立了预行程模型，该模型考虑了触发瞬间触针轴的弯曲变形。Pretravel是根据探针设计参数（如触针长度、三脚架支腿长度和触针材料）、探针操作参数（如弹簧力设置和探针接近方向）和触针轴重量进行建模的。在应用该模型预测探针预行程时，只需从48个实验探针数据点计算一个模型参数。该模型具有很强的鲁棒性，可以通过软件校正模块实现，该模块可以集成到机器系统中。

A pretravel model for horizontally-oriented touch trigger probe is described in this paper. A trigger force model based on the principle of mechanics is derived and used to develop the pretravel model, and the model accounts for bending deflection of the stylus shaft at the trigger instant. Pretravel is modeled as a function of probe design parameters (such as stylus length, tripod leg length, and stylus material), probe operating parameters (such as spring force setting and probe approach direction), and the weight of the stylus shaft. In applying the model to predict probe pretravel, only one model parameter needs to be calculated from 48 points of experimental probe data. The model is robust and can be implemented by means of a software correction module which can be incorporated into machine systems.