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Updated scad files based on test prints

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This commit is contained in:
TQ Hirsch
2022-04-24 23:58:24 +02:00
parent b676cf0409
commit ce6a6be1e9
5 changed files with 33 additions and 11 deletions
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2
mechanical/assembly.scad
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@@ -1,3 +1,5 @@
$fs=0.1;
include <constants.scad> include <constants.scad>
include <parts.scad> include <parts.scad>

2
mechanical/constants.scad
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@@ -14,7 +14,7 @@ cur_ypos = 140;
echo(str("Range = ", [ xsize - xmin * 2, ysize - ymin * 2 ])); echo(str("Range = ", [ xsize - xmin * 2, ysize - ymin * 2 ]));
//$fn = 30; $fn = 30;
screw_hole_expansion = 1.1; screw_hole_expansion = 1.1;
screw_num_sides = 7; screw_num_sides = 7;

11
mechanical/parts.scad
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@@ -409,6 +409,7 @@ module xsled_frame() {
} }
} }
gt2_clip_meshing_dist = belt_pitch * 6; gt2_clip_meshing_dist = belt_pitch * 6;
gt2_clip_peg_diam = 8; // min 6 gt2_clip_peg_diam = 8; // min 6
gt2_clip_ease_in_diam = 6; gt2_clip_ease_in_diam = 6;
@@ -418,7 +419,9 @@ gt2_clip_gap_diam = gt2_clip_peg_diam + belt_thickness * 2 + 1;
gt2_clip_thickness = (gt2_clip_peg_diam + gt2_clip_gap_diam)/2; gt2_clip_thickness = (gt2_clip_peg_diam + gt2_clip_gap_diam)/2;
gt2_clip_length = gt2_clip_narrowing_dist + gt2_clip_meshing_dist + gt2_clip_peg_diam / 2 + gt2_clip_gap_diam - belt_thickness; gt2_clip_length = gt2_clip_narrowing_dist + gt2_clip_meshing_dist + gt2_clip_peg_diam / 2 + gt2_clip_gap_diam - belt_thickness;
module gt2_clip_cutout(teeth_inside) { module gt2_clip_cutout(teeth_inside) {
dual_width = belt_thickness * 2 - tooth_height;
belt_expansion = 0.5;
dual_width = belt_thickness * 2 - tooth_height + belt_expansion;
loop_peg_diam = gt2_clip_peg_diam; // min 6mm loop_peg_diam = gt2_clip_peg_diam; // min 6mm
gap_diam = gt2_clip_gap_diam; gap_diam = gt2_clip_gap_diam;
narrowing_ease_diam = 6; narrowing_ease_diam = 6;
@@ -426,7 +429,7 @@ module gt2_clip_cutout(teeth_inside) {
meshing_dist = gt2_clip_meshing_dist; meshing_dist = gt2_clip_meshing_dist;
ease_out_rad = gap_diam - belt_thickness ; ease_out_rad = gap_diam - belt_thickness ;
out_off = teeth_inside ? 0 : dual_width - belt_thickness; out_off = teeth_inside ? 0 : dual_width - belt_thickness - belt_expansion;
translate([ translate([
-(narrowing_dist + meshing_dist + (ease_out_rad - out_off - belt_thickness)) -(narrowing_dist + meshing_dist + (ease_out_rad - out_off - belt_thickness))
-(teeth_inside ? tooth_height - belt_pld : belt_backing) -(teeth_inside ? tooth_height - belt_pld : belt_backing)
@@ -453,7 +456,7 @@ module gt2_clip_cutout(teeth_inside) {
[0, 0], [0, 0],
[meshing_dist - 1, 0], [meshing_dist - 1, 0],
[meshing_dist, - out_off], [meshing_dist, - out_off],
[meshing_dist, - belt_thickness - out_off], [meshing_dist, - belt_thickness - out_off - belt_expansion],
[meshing_dist - 1, - dual_width], [meshing_dist - 1, - dual_width],
[0, - dual_width] [0, - dual_width]
]); ]);
@@ -463,7 +466,7 @@ module gt2_clip_cutout(teeth_inside) {
square(ease_out_rad + 2); square(ease_out_rad + 2);
difference() { difference() {
circle(ease_out_rad - out_off); circle(ease_out_rad - out_off);
circle(ease_out_rad - out_off - belt_thickness); circle(ease_out_rad - out_off - belt_thickness - belt_expansion);
} }
} }
} }

2
mechanical/stock_parts.scad
View File

@@ -27,7 +27,7 @@ module bushing() {
} }
// located with the shaft in +z, face on the XY plane // located with the shaft in +z, face on the XY plane
module nema17(depth = 23.5) { module nema17(depth = 38) {
bom_item(printable = false, label = "NEMA-17 stepper motor"); bom_item(printable = false, label = "NEMA-17 stepper motor");
face = 42.3; face = 42.3;
screw_pitch = 31 / 2; screw_pitch = 31 / 2;

27
mechanical/test_prints.scad
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@@ -18,11 +18,28 @@ module bearing_slot() {
} }
let($fn = 30) { let($fn = 30) {
translate([-28, 0, frame_size/2]) //translate([-28, 0, frame_size/2])
rotate([0,90,0]) bearing_slot(); //rotate([0,90,0]) bearing_slot();
translate([28, 0, frame_size/2]) //translate([28, 0, frame_size/2])
rotate([0,-90,0]) bearing_slot(); // rotate([0,-90,0]) bearing_slot();
idler_post(10); //idler_post(10);
intersection() {
translate([0,0,belt_width/2 + 4])
union() {
gt2_clip(true);
translate([0,-1,0])
mirror([0,1,0])
gt2_clip(false);
}
translate([-40, -40, 0])
cube([80,80,belt_width + 2]);
}
//gt2_clip_cutout(false);
} }