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.png
A - 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.