## 6 Test  
To further corroborate the fidelity of the mathematical model and to substantiate the efficacy of the mechanism designed in this study for the non-destructive driving of cylindrical rollers, a functional prototype of the drive mechanism, founded upon the principle of non-destructive dynamic unbalance detection for cylindrical rollers, has been constructed. Test conditions: The specific test parameters are detailed in Table 1, with the respective cylindrical roller specimens illustrated in Figure 9. Each size variant of the cylindrical roller, totaling twenty pieces, was meticulously prepared for evaluation. The experimental setup, as depicted in Figures 10 and 11, comprised essential components, including the cylindrical roller, air flotation electrical spindle, vacuum suction cup, air flotation tooling (encompassing the air flotation sleeve, slide, and guide), and the laser displacement sensor (LK-H008) and laser tachometer (UT372). Following the thorough assembly and calibration processes for the drive mechanism, non-destructive drive tests were systematically conducted on the cylindrical roller specimens. Test methodology: Initially, place the cylindrical roller sample (ensuring it is devoid of contaminants and free from any residual oils) under the microscope to ascertain and document its initial surface condition. Subsequently, insert the cylindrical roller into the air flotation sleeve, configure the air flotation electric spindle to its rated speed, and specify the desired acceleration duration. Execute the high-speed rotation of the cylindrical roller and measure its actual rotational velocity once the acceleration phase is concluded. Following the completion of this motion, subject the cylindrical roller to microscopic examination once more, meticulously recording any alterations in its surface quality. Test Results: The driving process of the cylindrical roller proceeded smoothly and without any discernible noise or disruptions. As illustrated in Figure 12, the surface condition of the cylindrical roller following the drive remained indistinguishable from its pre-drive state. Furthermore, the actual speeds of the cylindrical roller, as outlined in Table 2, closely corresponded to the predetermined speeds set for the air flotation electrical spindle. This congruence between actual and designated speeds underscores the precision and reliability of the drive mechanism. Figure 11: Testing platform. Figure 10: Air flotation tooling. To verify that the driving mechanism can meet the non-destructive detecting requirements for dynamic unbalance in precision cylindrical rollers, subsequent experiments were conducted to non-destructively detect dynamic unbalance in precision cylindrical rollers. The experimental results are as follows. Figures 13 and 14 represent time-domain and frequency-domain signal plots, respectively. In Figure 13, cylindrical roller No. 0 corresponds to a meticulously selected precision roller, which can be approximated as having negligible dynamic unbalance. Cylindrical roller No. 2, on the other hand, underwent manual de-weighting and exhibited a certain level of dynamic unbalance. Figure 14 was sourced from reference [9], depicting amplitude response curves for cylindrical rollers with dynamic unbalance (represented by the red line) and standard rollers (approximated as having negligible dynamic unbalance, represented by the green line). Whether in the frequency-domain or time-domain signals, in the absence of external signal interference, theoretically, the excitation amplitude generated by a cylindrical roller with no dynamic unbalance should be zero. In Figure 13, the cylindrical roller without dynamic unbalance exhibits a vibration signal close to zero, appearing nearly as a straight line. This observation suggests that the additional vibration signal interference introduced by the proposed driving mechanism in this study was minimal.