目前CNC工具機單軸與雙軸的精度校驗都使用雷射精度校驗與Ball-bar循圓校驗方式進行,在考慮節省設備成本和提升校驗效率,本研究主要是提出以整合光學尺訊號解碼技術及單晶片嵌入式程式,去研發低成本可與工具機整合的機上精度校驗方法。單晶片微處理器中的精度校驗軟體,配合擷取光學尺的回授資料,可在不使用其他量測設備下直接進行精度校驗。該系統利用點矩陣LCD模組顯示器可將光學尺量測到的實際位置加以顯示來進行機台的單軸精度校驗和二軸同動精度校驗,以取代現有的雷射精度校驗與Ball-bar循圓校驗,除節省儀器費用外,亦增加了校驗便利性與時效性;另一優點則是使用者可作經常性的檢測,掌握機台的精度狀態,並校正與維護,使機台隨時保持在準確的狀態。
Laser measurement system and ball-bar measurement system are widely used in industry for machine accuracy calibration. Considering the cost and calibration efficiency, a new method integrating use of linear scale, LCD monitor, decoding/encoding technology, and 8051 chip is proposed in this study. The accuracy calibration program embedded in chip extracts and compares the readout of linear scale can directly perform the calibration without setting up an extra instrument. The method can be used for single axis positioning accuracy calibration and two-axis contouring accuracy calibration. The method can be used on a daily-base to ensure the machine is always in accurate condition.