Linear stages are one of the most important components of machine tools, additive manufacturing equipment, and many machines which are needed to create precise linear motion. Monitoring the current of electric motor has been used for sensorless diagnostic of linear stages. This paper proposed a new Automated Machine Learning (AutoML) approach. The proposed AutoML used multiple methods for interpretation of the current signal to estimate the extent of the misalignment problems. Support Vector Machine (SVM), Gradient Boosting (GB) and Auto-multilayer perceptron (AutoMLP) methods were used for classification of the data. To enhance the performance of these methods Ensemble learning (EL) was used to obtain the final decision by using estimations of each method. Motor current signals in the horizontal and vertical direction were saved in the user interface's database. AutoML learned the proper classification through the user interface which holds data and user interpretations for training and started to make classifications. To improve the classification performance, each hyperparameter was optimized and compared with the initial results. Experimental studies showed that the ensemble method was superior compared to the considered classification methods in fault detection through the motor current signal. The findings indicated that the current features could be used successfully discriminate the signals in the horizontal and vertical directions and could detect linear stage defects. In addition, the results demonstrated that additional fault detection capabilities may be added to the system.