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" . $msg . ""; } } module shaft_hole() { { // smoothing the top square(smoothing_radius+pad,smoothing_radius+pad); rotate_extrude(convexity=10, $fn = top_rounding_faces square(top_rounding_radius + pad, top_rounding_radius + pad); circle(r = top_rounding_radius, $fn = knob_faces); // @todo Calculate the convexity values based on http://www.latticesemi.com/view_document?document_id=213 BGA 0.8mm 9mm 121 BGA-132 11x17 12x18mm 1.0pitch Altera BGA-144 M144 MBGA Altera VBGA V81 BGA-81 Altera BGA-100 M100 MBGA 121-ball, 0.8mm BGA (based on standard DIP-4), row spacing 7.62 mm (300 mils 12-lead though-hole mounted DIP package, row spacing 8.89 mm (350 mils), body size (see http://www.kingtek.net.cn/pic/201601201446313350.pdf), JPin SMD DIP DIL PDIP 2.54mm 7.62mm 300mil SMD 2x-dip-switch SPST , Slide, row spacing 15.24 mm (600 mils), SMDSocket, SmallPads THT DIP DIL PDIP 2.54mm 25.4mm 1000mil Socket 3M 14-pin zero insertion force socket, through-hole, row spacing 7.62 mm (300 mils), body size (see http://omronfs.omron.com/en_US/ecb/products/pdf/en-a6s.pdf SMD 5x-dip-switch SPST Omron_A6S-510x, Slide, row spacing 7.62 mm (300 mils), http://multimedia.3m.com/mws/media/494546O/3mtm-dip-sockets-100-2-54-mm-ts0365.pdf 3M 40-pin zero insertion force socket, through-hole, row spacing 9.53 mm (375 mils), Clearance8mm 22-lead surface-mounted (SMD) DIP package, row spacing 25.4 mm (1000 mils), Socket, LongPads THT DIP DIL PDIP 2.54mm 22.86mm 900mil LongPads 64-lead though-hole mounted DIP package.