From: Ian Jackson Date: Fri, 2 May 2014 21:14:02 +0000 (+0100) Subject: belt-*: break out belt-cut-jig-common X-Git-Tag: filamentspool-v2-release~413 X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=commitdiff_plain;h=6b5e7a3720de0d03fa35a28c2fe01054cd3b71ac;ds=sidebyside belt-*: break out belt-cut-jig-common --- diff --git a/belt-cut-jig-common.scad b/belt-cut-jig-common.scad new file mode 100644 index 0000000..5464678 --- /dev/null +++ b/belt-cut-jig-common.scad @@ -0,0 +1,95 @@ +// -*- C -*- + +jig_max_len = 160; // print diagonally +//jig_max_len = 30; + +registrationgroove_width = 0.8; +registrationgroove_depth = 1.2; + +registrationprotrusion_poke = 3; +registrationprotrusion_slope = 0.75; + +jig_overlap = 1; + +jig_ends_extra = 2; + +jig_iters = floor((jig_max_len - jig_ends_extra) / jig_interval); +//jig_iters=2; +echo(jig_iters); + +module RegistrationGroove(l){ + // runs along the +ve X axis for length l but at correct z pos + translate([0, 0, jig_main_zsz + 0.1]) { + rotate([90,0,90]) + linear_extrude(height=l) + polygon([[-registrationgroove_width/2, 0], + [ +registrationgroove_width/2, 0], + [ 0, -registrationgroove_depth ]]); + } +} + +module OneJig(){ + difference(){ + translate([-(jig_interval/2 + jig_overlap), + jig_min_y, + -strap_thick]) + cube([jig_interval + 2, + jig_max_y - jig_min_y, + jig_main_zsz + strap_thick]); + OneJigCutout(); + translate([-100, -strap_width/2, -10]) + cube([200, strap_width, 10]); + translate([-100,0,0]) + RegistrationGroove(200); + for (xfrac=[-1/4,0,+1/4]) + translate([jig_interval * xfrac, -100, 0]) + rotate([0,0,90]) + RegistrationGroove(200); + } +} + +module RegistrationProtrusion(){ + // points towards the positive x axis + xsz = registrationprotrusion_poke; + ysz = registrationprotrusion_poke; + diag_sz = xsz * sqrt(2); + zsz = diag_sz / registrationprotrusion_slope; + hull(){ + translate([0, 0, 0.1]){ + linear_extrude(height=0.1) + polygon([[ 0, -ysz ], + [ xsz, 0 ], + [ 0, ysz ]]); + translate([-0.1, 0, zsz ]) + rotate([0,0,45]) + cube(0.1); + } + } +} + +module Jig(){ + for(end=[0,1]){ + for(yfrac=[-1/2, 0, 1/2]){ + translate([ end + ? jig_interval * (jig_iters - 0.5) + : -jig_interval/2, + yfrac * strap_width, + 0]) + rotate([0,0, end ? 0 : 180]) + translate([ jig_overlap, 0, 0 ]) + RegistrationProtrusion(); + } + } + for (i=[0:jig_iters-1]) { + translate([jig_interval * i, 0, 0]) + OneJig(); + } +} + +module JigPrint(){ + rotate([0,0,-45]) + translate([0,0,jig_main_zsz]) + rotate([180,0,0]) + Jig(); +} + diff --git a/belt-slot-cut-jig.scad b/belt-slot-cut-jig.scad index e5731c6..543a53f 100644 --- a/belt-slot-cut-jig.scad +++ b/belt-slot-cut-jig.scad @@ -5,7 +5,14 @@ // protrustions at ends at strap width and middle // grooves on top face at 1/4,1/2,3/4 length and 1/2 width +strap_thick = 3; +strap_width = 26.75 + 0.7; + +jig_interval = 25; + +edgewall_width = 3; crewpunch_slop = 0.3; +main_slop = 0.25; holder_min_wall = 2; holder_attach_near_wall = 5; @@ -18,26 +25,8 @@ holder_attach_roof = 2.5; holder_corner_round = 2.0; -jig_interval = 25; -strap_width = 26.75 + 0.7; -strap_thick = 3; -edgewall_width = 3; - punch_travel = 8; -main_slop = 0.25; - -jig_max_len = 160; // print diagonally -//jig_max_len = 30; - -registrationgroove_width = 0.8; -registrationgroove_depth = 1.2; - -registrationprotrusion_poke = 3; -registrationprotrusion_slope = 0.75; - -jig_overlap = 1; - // from careful measurement crewpunch_shape = @@ -95,11 +84,9 @@ jig_min_y = min(holder_all_min_y - main_slop, -strap_width/2) - edgewall_width; jig_main_zsz = holder_block_zsz + punch_travel; -jig_ends_extra = 2; +// common stuff -jig_iters = floor((jig_max_len - jig_ends_extra) / jig_interval); -//jig_iters=2; -echo(jig_iters); +include // objects @@ -166,83 +153,15 @@ module PunchHolder(cutouts=true){ } } -module RegistrationGroove(l){ - // runs along the +ve X axis for length l but at correct z pos - translate([0, 0, jig_main_zsz + 0.1]) { - rotate([90,0,90]) - linear_extrude(height=l) - polygon([[-registrationgroove_width/2, 0], - [ +registrationgroove_width/2, 0], - [ 0, -registrationgroove_depth ]]); - } -} - -module OneJig(){ - difference(){ - translate([-(jig_interval/2 + jig_overlap), - jig_min_y, - -strap_thick]) - cube([jig_interval + 2, - jig_max_y - jig_min_y, - jig_main_zsz + strap_thick]); - minkowski(){ - cube([main_slop*2, main_slop*2, 50], center=true); - PunchHolder(false); - } - translate([-100, -strap_width/2, -10]) - cube([200, strap_width, 10]); - translate([-100,0,0]) - RegistrationGroove(200); - for (xfrac=[-1/4,0,+1/4]) - translate([jig_interval * xfrac, -100, 0]) - rotate([0,0,90]) - RegistrationGroove(200); - } -} - -module RegistrationProtrusion(){ - // points towards the positive x axis - xsz = registrationprotrusion_poke; - ysz = registrationprotrusion_poke; - diag_sz = xsz * sqrt(2); - zsz = diag_sz / registrationprotrusion_slope; - hull(){ - translate([0, 0, 0.1]){ - linear_extrude(height=0.1) - polygon([[ 0, -ysz ], - [ xsz, 0 ], - [ 0, ysz ]]); - translate([-0.1, 0, zsz ]) - rotate([0,0,45]) - cube(0.1); - } - } -} - -module Jig(){ - for(end=[0,1]){ - for(yfrac=[-1/2, 0, 1/2]){ - translate([ end - ? jig_interval * (jig_iters - 0.5) - : -jig_interval/2, - yfrac * strap_width, - 0]) - rotate([0,0, end ? 0 : 180]) - translate([ jig_overlap, 0, 0 ]) - RegistrationProtrusion(); - } - } - for (i=[0:jig_iters-1]) { - translate([jig_interval * i, 0, 0]) - OneJig(); +module OneJigCutout(){ + minkowski(){ + cube([main_slop*2, main_slop*2, 50], center=true); + PunchHolder(false); } } module JigT(){ ////toplevel - rotate([0,0,-45]) - translate([0,0,jig_main_zsz]) - rotate([180,0,0]) - Jig(); + JigPrint(); } module PunchHolderT(){ ////toplevel @@ -269,7 +188,7 @@ module Kit(){ ////toplevel //PunchHolder(false); //OneJig(); //Jig(); -//Demo(); +Demo(); //JigT(); //RegistrationProtrusion(); //PunchHolderT();