alidel

Six-slot stencil for a repeatable projector focus check

Cut six slots (112×76 mm plate, 2.5 mm slots, 3.5 mm webs). Import the SVG at 100%, measure the cut outline and test on scrap. Stencil the bars onto paper, scan square-on and check that all six lines remain distinct. Put equal tiles at the centre and four corners of one slide. Export and check the source file first. Project it twice. If one corner blurs first, adjust position and focus. If all blur, enlarge the tiles and check scaling. Model checked; no physical test. X500 focus steps