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Release 0.3

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Enhancements
===========

- Unified Inch Screw Threads

Fixes
===========

- PCO-1881 internal (minor diameter was too small)
- Dpitch problem with G-ext threads

Improvements
===========

- developer docs
- build system
- unit tests
- user does not need to rotate internal threads by 180 deg anymore
to fit external thread

!! Incompatibel changes !!
====================

We take the liberty to do this while the major version is still 0:

- internal thread is rotated by 180 deg (see improvements). nut() and bolt() are not affected by this
This commit is contained in:
Adrian Schlatter
2019-11-13 21:17:52 +01:00
committed by GitHub
parent 49b5786cac
commit 315d3b96fb
22 changed files with 3520 additions and 1056 deletions
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66
design/BSPP_thread.awk Normal file
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@@ -0,0 +1,66 @@
function tan(x) {
return(sin(x) / cos(x))
}
function calculateThreadlibSpecs() {
Designator = $1;
P = $3;
H = P / 2 / tan(phi / 2);
DMax = $5;
DPitch = $6;
DMin = $7;
DPitchInt = DPitch + $9 / 2;
DPitchExt = DPitch + $10 / 2;
DMinInt = DMin + $14 / 2;
DMaxExt = DMax + $15 / 2;
DSupportExt = DPitchExt - 2 * 5 / 12 * H;
DSupportInt = DPitchInt + 2 * 5 / 12 * H;
DValleyExt = DPitchExt - 2 * 5 / 12 * H * qOverlap;
DValleyInt = DPitchInt + 2 * 5 / 12 * H * qOverlap;
DCrestExt = DMaxExt - tan((pi + phi) / 4) / 6 * (1 - sin(phi / 2));
DCrestInt = DMinInt + tan((pi + phi) / 4) / 6 * (1 - sin(phi / 2));
ZValley = 0.03125 * P;
ZCrestExt = (DPitchExt + H - DCrestExt) / 2 * tan(phi / 2);
ZCrestInt = (DCrestInt - DPitchInt + H) / 2 * tan(phi / 2);
}
BEGIN {
FS = "\t";
pi = atan2(0, -1);
deg = pi / 180;
phi = 55 * deg;
qOverlap = 1.05;
}
/^[^#]/ {
calculateThreadlibSpecs();
# External thread:
printf "G" Designator "-ext," # designator
printf P "," # pitch
printf "%.4f,", DValleyExt / 2 # Rrot
printf "%.4f,", DSupportExt # Dsupport
printf 0 "," # r0
printf "%.4f,", -P / 2 + ZValley # z0
printf 0 "," # r1
printf "%.4f,", +P / 2 - ZValley # z1
printf "%.4f,", (DCrestExt - DValleyExt) / 2 # r2
printf "%.4f,", +ZCrestExt # z2
printf "%.4f,", (DCrestExt - DValleyExt) / 2 # r3
printf "%.4f\n", -ZCrestExt; # z3
# Internal thread:
printf "G" Designator "-int," # designator
printf P "," # pitch
printf "%.4f,", -DValleyInt / 2 # Rrot
printf "%.4f,", DSupportInt # Dsupport
printf 0 "," # r0
printf "%.4f,", +P / 2 - ZValley # z0
printf 0 "," # r1
printf "%.4f,", -P / 2 + ZValley # z1
printf "%.4f,", -(DCrestInt - DValleyInt) / 2 # r2
printf "%.4f,", -ZCrestInt # z2
printf "%.4f,", -(DCrestInt - DValleyInt) / 2 # r3
printf "%.4f\n", +ZCrestInt; # z3
}