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9mm belts are a little more than 50% stronger/stiffer than 6mm ones. These parts work with 9mm belts.
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// 9mm (wide) belt locks. | ||
// | ||
// Haydn Huntley | ||
// haydn.huntley@gmail.com | ||
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$fn = 360/4; | ||
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include <configuration.scad>; | ||
include <roundedBox.scad>; | ||
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// All measurements in mm. | ||
xInsideBeltOffset = 5; | ||
actualBeltWidth = 9; | ||
beltWidth = actualBeltWidth + 1.0; | ||
singleBeltThickness = 1.5; | ||
doubleBeltThickness = 2.5+0.8; | ||
beltLockHeight = 4; | ||
m3BeltLockOffset = 4.65; | ||
rBeltLock = 4.4; | ||
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module upperBeltLock() | ||
{ | ||
difference() | ||
{ | ||
union() | ||
{ | ||
// Two circles joined by the area connecting them. | ||
for (x = [1, -1]) | ||
translate([x*m3BeltLockOffset, 0, 0]) | ||
cylinder(r=rBeltLock, h=beltLockHeight); | ||
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// Plus an oval to widen amd strengthen the middle. | ||
scale([2.0, 1.5, 1]) | ||
cylinder(r=rBeltLock, h=beltLockHeight); | ||
} | ||
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// A hole to capture the doubled GT2 belt. | ||
translate([0, 0, beltLockHeight/2]) | ||
cube([doubleBeltThickness, beltWidth, beltLockHeight+smidge], true); | ||
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// Two holes for capturing M3 nuts. | ||
for (x = [1, -1]) | ||
translate([x*m3BeltLockOffset, 0, -smidge/2]) | ||
{ | ||
cylinder(r1=m3LooseRadius+0.2, | ||
r2=m3LooseRadius, | ||
h=beltLockHeight+smidge); | ||
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// M3 nut traps. | ||
translate([0, 0, beltLockHeight-m3NutHeight/2]) | ||
rotate([0, 0, 30]) | ||
cylinder(r=m3NutRadius, h=m3NutHeight+smidge, $fn=6); | ||
} | ||
} | ||
} | ||
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module lowerBeltLock() | ||
{ | ||
difference() | ||
{ | ||
// Two circles joined by the area connecting them. | ||
union() | ||
{ | ||
for (x = [1, -1]) | ||
translate([x*m3BeltLockOffset, 0, 0]) | ||
cylinder(r=rBeltLock, h=beltLockHeight); | ||
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// Plus an oval to widen amd strengthen the middle. | ||
scale([2.0, 1.5, 1]) | ||
cylinder(r=rBeltLock, h=beltLockHeight); | ||
} | ||
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// A hole to capture the doubled GT2 belt. | ||
translate([0, 0, beltLockHeight/2]) | ||
cube([doubleBeltThickness, beltWidth, beltLockHeight+smidge], true); | ||
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// Two slightly tapering holes for the M3x35 SHCS. | ||
for (x = [1, -1]) | ||
translate([x*m3BeltLockOffset, 0, -smidge/2]) | ||
cylinder(r1=m3LooseRadius+0.2, | ||
r2=m3LooseRadius, | ||
h=beltLockHeight+smidge); | ||
} | ||
} | ||
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translate([0, 8, 0]) | ||
upperBeltLock(); | ||
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translate([0, -8, 0]) | ||
lowerBeltLock(); |
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