Thermal images collected during large-scale 3D printing with Ingersoll MasterPrint

This data set contains images produced to test the performance of anomaly and fault detection methods in the context of additive manufacturing. Two print jobs were executed using the Ingersoll MasterPrint with the Model 30 Strangpresse extruder. The material used was Techmer compounded polylactic acid (PLA) with wood flour as a filler (80/20 PLA/WF by weight). The first print job consists of the 3D printing of a hexagonal cylinder with a two-bead wall. This print was sliced at a gantry velocity of 3000 millimeter per minute, and an extruder screw speed of 68.14 rotations per minute. This are considered the normal operating conditions. A second hexagonal cylinder was printed using a reduced extruder screw speed, 15% lower than under normal operating conditions. The images were collected with a Teledyne FLIR Lepton 3.5 infra-red camera, a small form factor radiometric long-wave infrared camera with a spectral range of 8 µm to 14 µm. Sensor resolution was 160x120 pixels, with a pixel size of 12 µm, a temperature range of -10 - 450°C, and an accuracy of +/- 10°C in its low gain configuration. Images in this data set were collected with cameras oriented at the printer nozzle. The nozzle camera setup consisted of two cameras located 12.5cm from the nozzle center. These were mounted directly to the print head, so that the camera positions relative to the print direction would remain constant as it rotated around its C-axis to follow the print path. One camera was placed ahead of the nozzle to capture the previous layer immediately before being covered by the new layer of material, while the second camera was placed behind the nozzle and captured the freshly extruded bead. Images are collecting during each phase of the print: (a) idle (i.e., no material deposited), (b) extrusion (i.e., to prime the extruder), and (c) printing (deposition of material to manufacture the hexagonal cylinder).

本数据集包含用于测试增材制造场景下异常与故障检测方法性能的图像。本次实验采用英格索尔（Ingersoll）MasterPrint设备搭配30型Strangpresse挤出机完成两次打印作业，所用材料为泰克玛（Techmer）复配聚乳酸（PLA），以木粉作为填料，按重量计PLA与木粉比例为80/20。首次打印作业为打印带双道壁厚的六角圆柱，切片参数设置为龙门架移动速度3000毫米/分钟，挤出机螺杆转速68.14转/分钟，此工况被视为正常作业工况。第二次打印同样为六角圆柱，仅将挤出机螺杆转速较正常工况降低15%。图像采集采用Teledyne FLIR Lepton 3.5红外相机，该相机为小型化辐射型长波红外相机，光谱范围为8μm至14μm；传感器分辨率为160×120像素，像素尺寸12μm，温度检测范围为-10℃至450℃，低增益模式下测温精度为±10℃。相机沿打印机喷嘴方向布置，共两台，均安装在距离喷嘴中心12.5cm的位置，且直接固定于打印头上，以保证其相对于打印方向的位置在绕C轴旋转以跟随打印路径时保持恒定。其中一台相机位于喷嘴前方，用于捕获即将被新料层覆盖的前一层打印面；另一台位于喷嘴后方，用于采集刚挤出的料道。数据集涵盖打印各阶段的图像：(a) 空转阶段（无材料沉积）、(b) 挤出阶段（用于预热启动挤出机）、(c) 打印阶段（沉积材料以制造六角圆柱）。