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Align x belt pulley with x carriage and x idler #83

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Align x belt pulley with x carriage and x idler #83

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0342746
Update x-end.scad
brnrd-xx Feb 10, 2014
07e6e54
Update configuration.scad.dist
brnrd-xx Feb 10, 2014
5ace6e7
Update x-end.scad
brnrd-xx Feb 11, 2014
f10b01e
Update conf_bushing.scad
brnrd-xx Feb 11, 2014
4dda9f4
Line up x belt
brnrd-xx Feb 11, 2014
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4 changes: 4 additions & 0 deletions box_frame/configuration.scad.dist
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,8 @@ width_over_thickness = 2.2;
//belt_tooth_distance = 2.5;
//belt_tooth_ratio = 0.75;
//belt_thickness = 0.8;
//belt_tooth_depth = 0.7; //added by Marcelino Bernardo
//pulley_teeth = 17; //added by Marcelino Bernardo

// T5 (strongly discouraged)
//belt_width = 6.5;
Expand Down Expand Up @@ -57,6 +59,8 @@ belt_width = 6.5;
belt_tooth_distance = 2;
belt_tooth_ratio = 0.5;
belt_thickness = 0.8;
belt_tooth_depth = 0.7; //added by Marcelino Bernardo
pulley_teeth = 20; //added by Marcelino Bernardo

// Choose bearing/bushing configuration ***************************************
// conf_b_* are in inc/conf_bushing.scad
Expand Down
6 changes: 3 additions & 3 deletions box_frame/inc/conf_bushing.scad
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Expand Up @@ -42,7 +42,7 @@ conf_b_lm12luu = [6, 10.6, 57, 0, "lm12luu bearing (12mm, double length)"];
// Select by availability, smaller is better.
bearing_623 = [10, 4, 3, 1, "623 bearing"];
bearing_624 = [13, 5, 4, 1, "624 bearing"];
bearing_625 = [16, 5, 5, 1, "625 bearing"];
//bearing_625 = [16, 5, 5, 0, "625 bearing"]; //too big to add bearing guide

// two bearings side by side - for use without bearing guides.
// Not recomended anymore
Expand All @@ -51,8 +51,8 @@ bearing_624_double = [13, 10, 4, 0, "624 bearing x2"];
bearing_623_double = [10, 8, 3, 0, "623 bearing"];

// 608 [standard skate bearings] with bearing guide
bearing_608 = [22, 7, 8, 1, "608 bearing"];
//bearing_608 = [22, 7, 8, 1, "608 bearing"];
// 608 bearings with fender washers.
// the belt brushes both against the carriage and the washers.
bearing_608_washers = [22, 10, 8, 0, "608 bearing"];
//bearing_608_washers = [22, 10, 8, 0, "608 bearing"];

17 changes: 10 additions & 7 deletions box_frame/x-end.scad
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Expand Up @@ -31,6 +31,7 @@ bearing_height = max ((bushing_z[2] > 30 ? x_box_height : (2 * bushing_z[2] + 8)

module x_end_motor(){

motor_shift = (pulley_teeth*belt_tooth_distance/PI-17)/2; //Marcelino Bernardo
mirror([0, 1, 0]) {

x_end_base([3, 3, min((bushing_xy[0] - 3) * 2, 3), 2], len=42, offset=-5, thru=false);
Expand All @@ -43,21 +44,21 @@ module x_end_motor(){
union() {
translate([-14, -16 + z_delta / 2, 24]) cube_fillet([17.5, 10.5 + z_delta, 55], center = true, vertical=[0, 0, 3, 3], top=[0, 3, 6, 3], $fn=16);
//lower arm holding outer stepper screw
translate([-10.25, -34, 9]) intersection(){
translate([-10.25, -34, 9 + motor_shift]) intersection(){
translate([0, 0, -5]) cube_fillet([10, 37, 28], center = true, vertical=[0, 0, 0, 0], top=[0, 3, 5, 3]);
translate([-10/2, 10, -26]) rotate([45, 0, 0]) cube_fillet([10, 60, 60], radius=2);
}
}
}
translate([-16, -32, 30.25]) rotate([90, 0, 0]) rotate([0, 90, 0]) nema17(places=[1, 0, 1, 1], h=11);
translate([-16, -32, 30.25 + motor_shift]) rotate([90, 0, 0]) rotate([0, 90, 0]) nema17(places=[1, 0, 1, 1], h=11);
}

// motor screw holes
translate([21-5, -21-11, 30.25]){
// belt hole
translate([-30, 11, -0.25]) cube_fillet([11, 36, 22], vertical=0, top=[0, 1, 0, 1], bottom=[0, 1, 0, 1], center = true, $fn=4);
//motor mounting holes
translate([-29.5, 0, 0]) rotate([0, 0, 0]) rotate([0, 90, 0]) nema17(places=[1, 1, 0, 1], holes=true, shadow=5.5, $fn=small_hole_segments, h=8);
translate([-29.5, 0, motor_shift]) rotate([0, 0, 0]) rotate([0, 90, 0]) nema17(places=[1, 1, 0, 1], holes=true, shadow=5.5, $fn=small_hole_segments, h=8);
}
}
//smooth rod caps
Expand Down Expand Up @@ -111,17 +112,19 @@ module x_end_base(vfillet=[3, 3, 3, 3], thru=true, len=40, offset=0){
}

module x_end_idler(){

idler_shift = idler_bearing[0] / 2 + idler_bearing[3] * 6 * single_wall_width + 0.2 - (8.5 - belt_tooth_depth);
difference() {
x_end_base(len=48 + z_delta / 3, offset=-10 - z_delta / 3);
// idler hole
translate([-20, -15 - z_delta / 2, 30]) {
#translate([-20, -15 - z_delta / 2, 30 + idler_shift]) {
rotate([0, 90, 0]) cylinder(r=m4_diameter / 2, h=33, center=true, $fn=small_hole_segments);
translate([15 - 2 * single_wall_width, 0, 0]) rotate([90, 0, 90]) cylinder(r=m4_nut_diameter_horizontal / 2, h=3, $fn=6);

}
translate([-6 - x_box_width, 11, 29.5 - (max(idler_width, 16) / 2)]) cube([x_box_width + 1, 12, 1.5 + max(idler_bearing[0], 16)]);
#translate([-6 - x_box_width, 11, 30 - (1.5 + max(idler_width, 16) / 2) + idler_shift]) cube([x_box_width + 1, 12, 1.5 + max(idler_bearing[0], 16)]);
}
%translate([-14 - xy_delta / 2, -9, 30.5 - (max(idler_width, 16) / 2)]) x_tensioner();
%translate([-14 - xy_delta / 2, -9, 30 - (max(idler_width, 16) / 2) + idler_shift]) x_tensioner();
}

module x_tensioner(len=68, idler_height=max(idler_bearing[0], 16)) {
Expand All @@ -143,7 +146,7 @@ module pushfit_rod(diameter, length){


if (idler_bearing[3] == 1) { // bearing guides
translate([-39, -60 - idler_bearing[0] / 2, 4 - bushing_xy[0]]) rotate([0, 0, 55]) {
translate([-39, -60 - 17 / 2, 4 - bushing_xy[0]]) rotate([0, 0, 55]) {
render() bearing_assy();
}
}