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Improvements to core_xy

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1. Better default parameters
2. Changed plain_idler_offset to work in x and y, to facilitate larger idler pulleys
This commit is contained in:
Martin Budden
2021-11-27 15:07:36 +00:00
parent 59c3f984c5
commit e71db80093
1 changed files with 7 additions and 8 deletions
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15
utils/core_xy.scad
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@@ -30,7 +30,6 @@
//! allows flexible positioning of the motors.
//
include <../utils/core/core.scad>
include <../vitamins/belts.scad>
include <../vitamins/pulleys.scad>
@@ -69,7 +68,7 @@ function coreXY_drive_plain_idler_offset(type) = //! Offset of plain drive idler
[ coreXY_plain_idler_offset(type).x, -(pulley_od(coreXY_plain_idler(type)) + pulley_od(coreXY_drive_pulley(type))) / 2, 0 ];
module coreXY_half(type, size, pos, separation_y = 0, x_gap = 0, plain_idler_offset = 0, drive_pulley_offset = [0, 0], show_pulleys = false, lower_belt = false, hflip = false) { //! Draw one belt of a coreXY setup
module coreXY_half(type, size, pos, separation_y = 0, x_gap = 0, plain_idler_offset = [0, 0], drive_pulley_offset = [0, 0], show_pulleys = false, lower_belt = false, hflip = false) { //! Draw one belt of a coreXY setup
// y-carriage toothed pulley
p0_type = coreXY_toothed_idler(type);
@@ -92,19 +91,19 @@ module coreXY_half(type, size, pos, separation_y = 0, x_gap = 0, plain_idler_off
// toothed idler for offset stepper motor drive pulley
p3t_type = coreXY_toothed_idler(type);
p3t = [ -size.x / 2 + (drive_pulley_offset.x > 0 ? 0 : 2 * coreXY_drive_pulley_x_alignment(type)),
size.y / 2 + coreXY_drive_pulley_x_alignment(type) + drive_pulley_offset.y
size.y / 2 + coreXY_drive_pulley_x_alignment(type)
];
// y-carriage plain pulley
p4_type = coreXY_plain_idler(type);
p4 = [ -size.x / 2 + pulley_od(p4_type) / 2 + pulley_od(p3d_type) / 2 + coreXY_drive_pulley_x_alignment(type) + plain_idler_offset,
p4 = [ -size.x / 2 + pulley_od(p4_type) / 2 + pulley_od(p3d_type) / 2 + coreXY_drive_pulley_x_alignment(type) + plain_idler_offset.x,
-size.y / 2 + pulley_od(p4_type) / 2 + pos.y + separation_y / 2
];
// plain idler for offset stepper motor drive pulley
p3p_type = p4_type;
p3p = [ drive_pulley_offset.x > 0 ? p4.x : -p0.x - pulley_od(p0_type),
size.y / 2 - pulley_od(p3p_type) / 2 - pulley_od(p3d_type) / 2 + drive_pulley_offset.y
size.y / 2 - pulley_od(p3p_type) / 2 - pulley_od(p3d_type) / 2 + plain_idler_offset.y
];
// Start and end points
@@ -180,7 +179,7 @@ module coreXY_half(type, size, pos, separation_y = 0, x_gap = 0, plain_idler_off
tooth_colour = lower_belt ? coreXY_lower_tooth_colour(type) : coreXY_upper_tooth_colour(type));
}
module coreXY(type, size, pos, separation, x_gap, plain_idler_offset = 0, upper_drive_pulley_offset, lower_drive_pulley_offset, show_pulleys = false, left_lower = false) { //! Wrapper module to draw both belts of a coreXY setup
module coreXY(type, size, pos, separation, x_gap = 0, plain_idler_offset = [0, 0], upper_drive_pulley_offset = [0, 0], lower_drive_pulley_offset = [0, 0], show_pulleys = false, left_lower = false) { //! Wrapper module to draw both belts of a coreXY setup
translate([size.x / 2 - separation.x / 2, size.y / 2, -separation.z / 2]) {
// lower belt
hflip(!left_lower)
@@ -195,10 +194,10 @@ module coreXY(type, size, pos, separation, x_gap, plain_idler_offset = 0, upper_
}
}
module coreXY_belts(type, carriagePosition, coreXYPosBL, coreXYPosTR, separation, x_gap = 20, upper_drive_pulley_offset = [0, 0], lower_drive_pulley_offset = [0, 0], show_pulleys = false, left_lower = false) { //! Draw the coreXY belts
module coreXY_belts(type, carriagePosition, coreXYPosBL, coreXYPosTR, separation, x_gap = 0, plain_idler_offset = [0, 0], upper_drive_pulley_offset = [0, 0], lower_drive_pulley_offset = [0, 0], show_pulleys = false, left_lower = false) { //! Draw the coreXY belts
assert(coreXYPosBL.z == coreXYPosTR.z);
coreXYSize = coreXYPosTR - coreXYPosBL;
translate(coreXYPosBL)
coreXY(type, coreXYSize, [carriagePosition.x - coreXYPosBL.x, carriagePosition.y - coreXYPosBL.y], separation = separation, x_gap = x_gap, plain_idler_offset = 0, upper_drive_pulley_offset = upper_drive_pulley_offset, lower_drive_pulley_offset = lower_drive_pulley_offset, show_pulleys = show_pulleys, left_lower = left_lower);
coreXY(type, coreXYSize, [carriagePosition.x - coreXYPosBL.x, carriagePosition.y - coreXYPosBL.y], separation, x_gap, plain_idler_offset, upper_drive_pulley_offset, lower_drive_pulley_offset, show_pulleys, left_lower);
}