Measuring and modeling the tool path of small-sized drill bits (0.5 mm) in wood-based materials

The aim of the article was to investigate the trajectory of a hole drilled using small-dimension drill bits in wood-based materials. Computer vision was used to determine the three-dimensional position of the hole. Scans were made to a depth of about 5 mm every 0.5 mm (access to subsequent layers was obtained by milling with a 26 mm cutter). The obtained results allowed to determine the parameters of the obtained hole, allowing to correlate the quantities, such as: relative azimuth, deflections, angles. Good correlation (R2 > 0.75) between total deviation and initial deviation for both materials can be found. The initial deviation forces a specific direction of further deviation.Naming convention:AF160D10_05Z44BC.pngA - material type: P - hardboard, M - MDF,F160 - feed of test holes of 16.0 inch/min (constant in this data set),D10 - reference holes size of 1.0 mm (constant in this data set),_05 - test holes size of 0.5 mm (constant in this data set),Z44 - depth of scan in tenth of mm: 0 mm to 5.5 mm,B - sample letter,C - scan number.Examples:PF160D10_05Z05CB: hardboard, scan at 0.5 mm depth, sample no. C, first rotation (90 degree).MF160D10_05Z45ZD: MDF, scan at 4.5 mm, sample no. Z, 270 deg.