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vise screw question

GH
gene heskett
Sun, Jul 17, 2022 3:15 PM

Greetings all;

I think I may be in over my head.
This code starts to make cap to go on the ends of the handle rod for
this screw,
the remainder of a spherical knob being printed from TPU so serve as a
bumper
when the user lets go of the handle and the handle slides thru the hole
until
it hits the knob on the end of the handle. Because they are cheap by the
25 lb
pail, I want to drill into the end of an oak dowel for a 4" long #10
deck screw.
But the deck screw has a tulip head, not the usual tapered conical of a
flat
headed wood screw.

So I need to model that tulip shape with another module to be the final
difference
in this code:

module handle_washer()
{ $fn=180;
    translate([0,0,-12])difference()
    {
        sphere(d=40);
        translate([-22.5,-22.5,-33])cube(45);
        translate([0,0,16])cylinder(h=10,d=4,center=true);
    }
}

Ideas on how to go about that?

The only idea I can come up with is a 3mm diameter disk extruded to a
usable
thickness, offset so as to form a tulip shape if rotated about the 4mm shank
of the deck screw, and that then used as a difference under a conical
cylinder.
That I may be able to do, but it seems to me there ought to be a different,
better way.

Is there?

Thank you all. Take care and stay well.

Cheers, Gene Heskett.

"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.

Greetings all; I think I may be in over my head. This code starts to make cap to go on the ends of the handle rod for this screw, the remainder of a spherical knob being printed from TPU so serve as a bumper when the user lets go of the handle and the handle slides thru the hole until it hits the knob on the end of the handle. Because they are cheap by the 25 lb pail, I want to drill into the end of an oak dowel for a 4" long #10 deck screw. But the deck screw has a tulip head, not the usual tapered conical of a flat headed wood screw. So I need to model that tulip shape with another module to be the final difference in this code: module handle_washer() { $fn=180;     translate([0,0,-12])difference()     {         sphere(d=40);         translate([-22.5,-22.5,-33])cube(45);         translate([0,0,16])cylinder(h=10,d=4,center=true);     } } Ideas on how to go about that? The only idea I can come up with is a 3mm diameter disk extruded to a usable thickness, offset so as to form a tulip shape if rotated about the 4mm shank of the deck screw, and that then used as a difference under a conical cylinder. That I may be able to do, but it seems to me there ought to be a different, better way. Is there? Thank you all. Take care and stay well. Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/>
MM
Michael Möller
Sun, Jul 17, 2022 5:05 PM

A picture of a Tulip Head of a screw ... when I google the term I get lots
of surgical implant stuff ... you're not doing surgical equipment are you?

On Sun, 17 Jul 2022 at 17:16, gene heskett gheskett@shentel.net wrote:

Greetings all;

I think I may be in over my head.
This code starts to make cap to go on the ends of the handle rod for
this screw,
the remainder of a spherical knob being printed from TPU so serve as a
bumper
when the user lets go of the handle and the handle slides thru the hole
until
it hits the knob on the end of the handle. Because they are cheap by the
25 lb
pail, I want to drill into the end of an oak dowel for a 4" long #10
deck screw.
But the deck screw has a tulip head, not the usual tapered conical of a
flat
headed wood screw.

So I need to model that tulip shape with another module to be the final
difference
in this code:

module handle_washer()
{ $fn=180;
translate([0,0,-12])difference()
{
sphere(d=40);
translate([-22.5,-22.5,-33])cube(45);
translate([0,0,16])cylinder(h=10,d=4,center=true);
}
}

Ideas on how to go about that?

The only idea I can come up with is a 3mm diameter disk extruded to a
usable
thickness, offset so as to form a tulip shape if rotated about the 4mm
shank
of the deck screw, and that then used as a difference under a conical
cylinder.
That I may be able to do, but it seems to me there ought to be a different,
better way.

Is there?

Thank you all. Take care and stay well.

Cheers, Gene Heskett.

"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.


OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org

A picture of a Tulip Head of a screw ... when I google the term I get lots of surgical implant stuff ... you're not doing surgical equipment are you? On Sun, 17 Jul 2022 at 17:16, gene heskett <gheskett@shentel.net> wrote: > Greetings all; > > I think I may be in over my head. > This code starts to make cap to go on the ends of the handle rod for > this screw, > the remainder of a spherical knob being printed from TPU so serve as a > bumper > when the user lets go of the handle and the handle slides thru the hole > until > it hits the knob on the end of the handle. Because they are cheap by the > 25 lb > pail, I want to drill into the end of an oak dowel for a 4" long #10 > deck screw. > But the deck screw has a tulip head, not the usual tapered conical of a > flat > headed wood screw. > > So I need to model that tulip shape with another module to be the final > difference > in this code: > > module handle_washer() > { $fn=180; > translate([0,0,-12])difference() > { > sphere(d=40); > translate([-22.5,-22.5,-33])cube(45); > translate([0,0,16])cylinder(h=10,d=4,center=true); > } > } > > Ideas on how to go about that? > > The only idea I can come up with is a 3mm diameter disk extruded to a > usable > thickness, offset so as to form a tulip shape if rotated about the 4mm > shank > of the deck screw, and that then used as a difference under a conical > cylinder. > That I may be able to do, but it seems to me there ought to be a different, > better way. > > Is there? > > Thank you all. Take care and stay well. > > Cheers, Gene Heskett. > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author, 1940) > If we desire respect for the law, we must first make the law respectable. > - Louis D. Brandeis > Genes Web page <http://geneslinuxbox.net:6309/> > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >
T
trygve@totallytrygve.com
Sun, Jul 17, 2022 6:52 PM

Is the screw head one of these?
https://en.wikipedia.org/wiki/Screw#Screw_head_shapes

Trygve

Den 17. juli 2022 kl. 19.05.33 +02.00 skrev Michael Möller private2michael@gmail.com:

A picture of a Tulip Head of a screw ... when I google the term I get lots of surgical implant stuff ... you're not doing surgical equipment are you?

On Sun, 17 Jul 2022 at 17:16, gene heskett <gheskett@shentel.net> wrote:

Greetings all;

I think I may be in over my head.
This code starts to make cap to go on the ends of the handle rod for
this screw,
the remainder of a spherical knob being printed from TPU so serve as a
bumper
when the user lets go of the handle and the handle slides thru the hole
until
it hits the knob on the end of the handle. Because they are cheap by the
25 lb
pail, I want to drill into the end of an oak dowel for a 4" long #10
deck screw.
But the deck screw has a tulip head, not the usual tapered conical of a
flat
headed wood screw.

So I need to model that tulip shape with another module to be the final
difference
in this code:

module handle_washer()
{ $fn=180;
translate([0,0,-12])difference()
{
sphere(d=40);
translate([-22.5,-22.5,-33])cube(45);
translate([0,0,16])cylinder(h=10,d=4,center=true);
}
}

Ideas on how to go about that?

The only idea I can come up with is a 3mm diameter disk extruded to a
usable
thickness, offset so as to form a tulip shape if rotated about the 4mm shank
of the deck screw, and that then used as a difference under a conical
cylinder.
That I may be able to do, but it seems to me there ought to be a different,
better way.

Is there?

Thank you all. Take care and stay well.

Cheers, Gene Heskett.

"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.


OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org


OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org

Is the screw head one of these? <https://en.wikipedia.org/wiki/Screw#Screw_head_shapes> Trygve Den 17. juli 2022 kl. 19.05.33 +02.00 skrev Michael Möller <private2michael@gmail.com>: > A picture of a Tulip Head of a screw ... when I google the term I get lots of surgical implant stuff ... you're not doing surgical equipment are you? > > > On Sun, 17 Jul 2022 at 17:16, gene heskett <<gheskett@shentel.net>> wrote: > > > Greetings all; > > > > > > I think I may be in over my head. > > This code starts to make cap to go on the ends of the handle rod for > > this screw, > > the remainder of a spherical knob being printed from TPU so serve as a > > bumper > > when the user lets go of the handle and the handle slides thru the hole > > until > > it hits the knob on the end of the handle. Because they are cheap by the > > 25 lb > > pail, I want to drill into the end of an oak dowel for a 4" long #10 > > deck screw. > > But the deck screw has a tulip head, not the usual tapered conical of a > > flat > > headed wood screw. > > > > > > So I need to model that tulip shape with another module to be the final > > difference > > in this code: > > > > > > module handle_washer() > > { $fn=180; > > translate([0,0,-12])difference() > > { > > sphere(d=40); > > translate([-22.5,-22.5,-33])cube(45); > > translate([0,0,16])cylinder(h=10,d=4,center=true); > > } > > } > > > > > > Ideas on how to go about that? > > > > > > The only idea I can come up with is a 3mm diameter disk extruded to a > > usable > > thickness, offset so as to form a tulip shape if rotated about the 4mm shank > > of the deck screw, and that then used as a difference under a conical > > cylinder. > > That I may be able to do, but it seems to me there ought to be a different, > > better way. > > > > > > Is there? > > > > > > Thank you all. Take care and stay well. > > > > > > Cheers, Gene Heskett. > > -- > > "There are four boxes to be used in defense of liberty: > > soap, ballot, jury, and ammo. Please use in that order." > > -Ed Howdershelt (Author, 1940) > > If we desire respect for the law, we must first make the law respectable. > > - Louis D. Brandeis > > Genes Web page <<http://geneslinuxbox.net:6309/>> > > _______________________________________________ > > OpenSCAD mailing list > > To unsubscribe send an email to <discuss-leave@lists.openscad.org> > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to <discuss-leave@lists.openscad.org> >
GH
gene heskett
Sun, Jul 17, 2022 8:47 PM

On 7/17/22 13:09, Michael Möller wrote:

A picture of a Tulip Head of a screw ... when I google the term I get lots
of surgical implant stuff ... you're not doing surgical equipment are you?

Not hardly Michael, it's the knob on the end of a vise handle.  And I am
changing my thinking a bit but the need for that shape isn't changed.
I'll move the flat face (the cube) to just clip off the the bottom, then
add a 19mm hole to fit over the end of the dowel, hollowing it out to
about the flat faces location. Then print a TPU sleeve with a 19mm bore
and a 25mm OD & 16 to 17mm long for the bumper.

This is the underside of the head of a commonly used here in the US
for a "deck" screw, holding the wooden planks of a front or back deck
or porch floor to its sub-framing  on your house. Usually with a T25 or
 so torx socket for a driving tool. google or DDG for deck screws should
get you some pix for reference.

I've got one of these making just to see if it fits the doweling.

module handle_washer()
{ $fn=180;
    translate([0,0,15.50])difference()
    {
        sphere(d=40);
        translate([-22.5,-22.5,-60.5])cube(45);
        translate([0,0,16])cylinder(h=10,d=4,center=true);
        translate([0,0,-2.1])cylinder(h=27,d=19,center=true);
    }
}

but I still need to see about the screw head socket on top of it.
And watching it form, its plain to see 40mm is too big, so I've
reduced it to 28mm and adjusted the rest to fit, but I think I've
found a bug, the ! in front of the sphere I expected to make it
transparent so I could see whats inside, but what it does do is
not helpful at all as it just turns it grey and solid.

Is that the intended behavior?
So I'll make this one next after I test fit whats making now.
module handle_cap()
{ $fn=180;
    translate([0,0,5.5])difference()
    {
        sphere(d=28);
        translate([0,0,9])cylinder(h=10,d=4,center=true);
        translate([0,0,-0.6])cylinder(h=11,d=19,center=true);
        translate([-22.5,-22.5,-50.5])cube(45);
    }
}

On Sun, 17 Jul 2022 at 17:16, gene heskett gheskett@shentel.net wrote:

Greetings all;

I think I may be in over my head.
This code starts to make cap to go on the ends of the handle rod for
this screw,
the remainder of a spherical knob being printed from TPU so serve as a
bumper
when the user lets go of the handle and the handle slides thru the hole
until
it hits the knob on the end of the handle. Because they are cheap by the
25 lb
pail, I want to drill into the end of an oak dowel for a 4" long #10
deck screw.
But the deck screw has a tulip head, not the usual tapered conical of a
flat
headed wood screw.

So I need to model that tulip shape with another module to be the final
difference
in this code:

Ideas on how to go about that?

The only idea I can come up with is a 3mm diameter disk extruded to a
usable
thickness, offset so as to form a tulip shape if rotated about the 4mm
shank
of the deck screw, and that then used as a difference under a conical
cylinder.
That I may be able to do, but it seems to me there ought to be a different,
better way.

Is there?

Thank you all. Take care and stay well.

Cheers, Gene Heskett.

"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page http://geneslinuxbox.net:6309/


OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org


OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org

Cheers, Gene Heskett.

"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.

On 7/17/22 13:09, Michael Möller wrote: > A picture of a Tulip Head of a screw ... when I google the term I get lots > of surgical implant stuff ... you're not doing surgical equipment are you? Not hardly Michael, it's the knob on the end of a vise handle.  And I am changing my thinking a bit but the need for that shape isn't changed. I'll move the flat face (the cube) to just clip off the the bottom, then add a 19mm hole to fit over the end of the dowel, hollowing it out to about the flat faces location. Then print a TPU sleeve with a 19mm bore and a 25mm OD & 16 to 17mm long for the bumper. This is the underside of the head of a commonly used here in the US for a "deck" screw, holding the wooden planks of a front or back deck or porch floor to its sub-framing  on your house. Usually with a T25 or  so torx socket for a driving tool. google or DDG for deck screws should get you some pix for reference. I've got one of these making just to see if it fits the doweling. module handle_washer() { $fn=180;     translate([0,0,15.50])difference()     {         sphere(d=40);         translate([-22.5,-22.5,-60.5])cube(45);         translate([0,0,16])cylinder(h=10,d=4,center=true);         translate([0,0,-2.1])cylinder(h=27,d=19,center=true);     } } but I still need to see about the screw head socket on top of it. And watching it form, its plain to see 40mm is too big, so I've reduced it to 28mm and adjusted the rest to fit, but I think I've found a bug, the ! in front of the sphere I expected to make it transparent so I could see whats inside, but what it does do is not helpful at all as it just turns it grey and solid. Is that the intended behavior? So I'll make this one next after I test fit whats making now. module handle_cap() { $fn=180;     translate([0,0,5.5])difference()     {         sphere(d=28);         translate([0,0,9])cylinder(h=10,d=4,center=true);         translate([0,0,-0.6])cylinder(h=11,d=19,center=true);         translate([-22.5,-22.5,-50.5])cube(45);     } } > On Sun, 17 Jul 2022 at 17:16, gene heskett <gheskett@shentel.net> wrote: > >> Greetings all; >> >> I think I may be in over my head. >> This code starts to make cap to go on the ends of the handle rod for >> this screw, >> the remainder of a spherical knob being printed from TPU so serve as a >> bumper >> when the user lets go of the handle and the handle slides thru the hole >> until >> it hits the knob on the end of the handle. Because they are cheap by the >> 25 lb >> pail, I want to drill into the end of an oak dowel for a 4" long #10 >> deck screw. >> But the deck screw has a tulip head, not the usual tapered conical of a >> flat >> headed wood screw. >> >> So I need to model that tulip shape with another module to be the final >> difference >> in this code: >> >> >> Ideas on how to go about that? >> >> The only idea I can come up with is a 3mm diameter disk extruded to a >> usable >> thickness, offset so as to form a tulip shape if rotated about the 4mm >> shank >> of the deck screw, and that then used as a difference under a conical >> cylinder. >> That I may be able to do, but it seems to me there ought to be a different, >> better way. >> >> Is there? >> >> Thank you all. Take care and stay well. >> >> Cheers, Gene Heskett. >> -- >> "There are four boxes to be used in defense of liberty: >> soap, ballot, jury, and ammo. Please use in that order." >> -Ed Howdershelt (Author, 1940) >> If we desire respect for the law, we must first make the law respectable. >> - Louis D. Brandeis >> Genes Web page <http://geneslinuxbox.net:6309/> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org >> > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/>
GH
gene heskett
Sun, Jul 17, 2022 9:35 PM

On 7/17/22 14:55, trygve@totallytrygve.com wrote:

No,  see attached pix, this is the screw I will be using, a #6 drywall
screw,
about 1.625" long. In looking at the #10 deck screws which are very
similarly
shaped, I came to the conclusion that drilling a pilot hole that big
would weaken
the oak at its position passing thru the bolt head, encouraging its
breakage.

So as mentioned in the last post, I've reduced the knob to 28mm in diameter
and adjusted the rest to fit. I've half or more of a 5lb box of this
screw, which will
not reach all the way thru the bolt's square head, needs a much smaller
pilot
hole etc. These screws are fairly hard steel, so the chances of popping the
head off are somewhere between slim and none.

But that should show the tulip shape I need to fit, somewhere around a
2.5 to
3mm radius with the outer edge being the preferred first contact point.

These have a #2 Phillips head. One Bosch #2 bit in variable speed drill
will drive
50 lbs of this screw. Unless you've a dummy running the drill. :o(>
Bosch makes
good stuff.

Trygve

Thank you. Take care and stay well.

Cheers, Gene Heskett.

"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.

On 7/17/22 14:55, trygve@totallytrygve.com wrote: > Is the screw head one of these? > <https://en.wikipedia.org/wiki/Screw#Screw_head_shapes> No,  see attached pix, this is the screw I will be using, a #6 drywall screw, about 1.625" long. In looking at the #10 deck screws which are very similarly shaped, I came to the conclusion that drilling a pilot hole that big would weaken the oak at its position passing thru the bolt head, encouraging its breakage. So as mentioned in the last post, I've reduced the knob to 28mm in diameter and adjusted the rest to fit. I've half or more of a 5lb box of this screw, which will not reach all the way thru the bolt's square head, needs a much smaller pilot hole etc. These screws are fairly hard steel, so the chances of popping the head off are somewhere between slim and none. But that should show the tulip shape I need to fit, somewhere around a 2.5 to 3mm radius with the outer edge being the preferred first contact point. These have a #2 Phillips head. One Bosch #2 bit in variable speed drill will drive 50 lbs of this screw. Unless you've a dummy running the drill. :o(> Bosch makes good stuff. > Trygve Thank you. Take care and stay well. Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/>
WL
William Lugg
Sun, Jul 17, 2022 9:40 PM

Gene,
My money would be on just forming a standard countersunk hole for the
head.  I wouldn't worry about perfectly matching the curvature of the
deck screw.  Once it's all together, It won't matter and this doesn't
sound like a structural joint that will be under a significant amount of
tension either.

Just my $0.02.
Bill Lugg

On 7/17/22 14:47, gene heskett wrote:

On 7/17/22 13:09, Michael Möller wrote:

A picture of a Tulip Head of a screw ... when I google the term I get lots
of surgical implant stuff ... you're not doing surgical equipment are you?

Not hardly Michael, it's the knob on the end of a vise handle.  And I am
changing my thinking a bit but the need for that shape isn't changed.
I'll move the flat face (the cube) to just clip off the the bottom, then
add a 19mm hole to fit over the end of the dowel, hollowing it out to
about the flat faces location. Then print a TPU sleeve with a 19mm bore
and a 25mm OD & 16 to 17mm long for the bumper.

This is the underside of the head of a commonly used here in the US
for a "deck" screw, holding the wooden planks of a front or back deck
or porch floor to its sub-framing  on your house. Usually with a T25 or
 so torx socket for a driving tool. google or DDG for deck screws should
get you some pix for reference.

I've got one of these making just to see if it fits the doweling.

module handle_washer()
{ $fn=180;
    translate([0,0,15.50])difference()
    {
        sphere(d=40);
        translate([-22.5,-22.5,-60.5])cube(45);
        translate([0,0,16])cylinder(h=10,d=4,center=true);
        translate([0,0,-2.1])cylinder(h=27,d=19,center=true);
    }
}

but I still need to see about the screw head socket on top of it.
And watching it form, its plain to see 40mm is too big, so I've
reduced it to 28mm and adjusted the rest to fit, but I think I've
found a bug, the ! in front of the sphere I expected to make it
transparent so I could see whats inside, but what it does do is
not helpful at all as it just turns it grey and solid.

Is that the intended behavior?
So I'll make this one next after I test fit whats making now.
module handle_cap()
{ $fn=180;
    translate([0,0,5.5])difference()
    {
        sphere(d=28);
        translate([0,0,9])cylinder(h=10,d=4,center=true);
        translate([0,0,-0.6])cylinder(h=11,d=19,center=true);
        translate([-22.5,-22.5,-50.5])cube(45);
    }
}

On Sun, 17 Jul 2022 at 17:16, gene heskett gheskett@shentel.net wrote:

Greetings all;

I think I may be in over my head.
This code starts to make cap to go on the ends of the handle rod for
this screw,
the remainder of a spherical knob being printed from TPU so serve as a
bumper
when the user lets go of the handle and the handle slides thru the hole
until
it hits the knob on the end of the handle. Because they are cheap by the
25 lb
pail, I want to drill into the end of an oak dowel for a 4" long #10
deck screw.
But the deck screw has a tulip head, not the usual tapered conical of a
flat
headed wood screw.

So I need to model that tulip shape with another module to be the final
difference
in this code:

Ideas on how to go about that?

The only idea I can come up with is a 3mm diameter disk extruded to a
usable
thickness, offset so as to form a tulip shape if rotated about the 4mm
shank
of the deck screw, and that then used as a difference under a conical
cylinder.
That I may be able to do, but it seems to me there ought to be a different,
better way.

Is there?

Thank you all. Take care and stay well.

Cheers, Gene Heskett.

"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page http://geneslinuxbox.net:6309/


OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org


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Cheers, Gene Heskett.

"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page http://geneslinuxbox.net:6309/


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Gene, My money would be on just forming a standard countersunk hole for the head.  I wouldn't worry about perfectly matching the curvature of the deck screw.  Once it's all together, It won't matter and this doesn't sound like a structural joint that will be under a significant amount of tension either. Just my $0.02. Bill Lugg On 7/17/22 14:47, gene heskett wrote: > On 7/17/22 13:09, Michael Möller wrote: >> A picture of a Tulip Head of a screw ... when I google the term I get lots >> of surgical implant stuff ... you're not doing surgical equipment are you? > Not hardly Michael, it's the knob on the end of a vise handle.  And I am > changing my thinking a bit but the need for that shape isn't changed. > I'll move the flat face (the cube) to just clip off the the bottom, then > add a 19mm hole to fit over the end of the dowel, hollowing it out to > about the flat faces location. Then print a TPU sleeve with a 19mm bore > and a 25mm OD & 16 to 17mm long for the bumper. > > This is the underside of the head of a commonly used here in the US > for a "deck" screw, holding the wooden planks of a front or back deck > or porch floor to its sub-framing  on your house. Usually with a T25 or >  so torx socket for a driving tool. google or DDG for deck screws should > get you some pix for reference. > > I've got one of these making just to see if it fits the doweling. > > module handle_washer() > { $fn=180; >     translate([0,0,15.50])difference() >     { >         sphere(d=40); >         translate([-22.5,-22.5,-60.5])cube(45); >         translate([0,0,16])cylinder(h=10,d=4,center=true); >         translate([0,0,-2.1])cylinder(h=27,d=19,center=true); >     } > } > > but I still need to see about the screw head socket on top of it. > And watching it form, its plain to see 40mm is too big, so I've > reduced it to 28mm and adjusted the rest to fit, but I think I've > found a bug, the ! in front of the sphere I expected to make it > transparent so I could see whats inside, but what it does do is > not helpful at all as it just turns it grey and solid. > > Is that the intended behavior? > So I'll make this one next after I test fit whats making now. > module handle_cap() > { $fn=180; >     translate([0,0,5.5])difference() >     { >         sphere(d=28); >         translate([0,0,9])cylinder(h=10,d=4,center=true); >         translate([0,0,-0.6])cylinder(h=11,d=19,center=true); >         translate([-22.5,-22.5,-50.5])cube(45); >     } > } >> On Sun, 17 Jul 2022 at 17:16, gene heskett <gheskett@shentel.net> wrote: >> >>> Greetings all; >>> >>> I think I may be in over my head. >>> This code starts to make cap to go on the ends of the handle rod for >>> this screw, >>> the remainder of a spherical knob being printed from TPU so serve as a >>> bumper >>> when the user lets go of the handle and the handle slides thru the hole >>> until >>> it hits the knob on the end of the handle. Because they are cheap by the >>> 25 lb >>> pail, I want to drill into the end of an oak dowel for a 4" long #10 >>> deck screw. >>> But the deck screw has a tulip head, not the usual tapered conical of a >>> flat >>> headed wood screw. >>> >>> So I need to model that tulip shape with another module to be the final >>> difference >>> in this code: >>> >>> >>> Ideas on how to go about that? >>> >>> The only idea I can come up with is a 3mm diameter disk extruded to a >>> usable >>> thickness, offset so as to form a tulip shape if rotated about the 4mm >>> shank >>> of the deck screw, and that then used as a difference under a conical >>> cylinder. >>> That I may be able to do, but it seems to me there ought to be a different, >>> better way. >>> >>> Is there? >>> >>> Thank you all. Take care and stay well. >>> >>> Cheers, Gene Heskett. >>> -- >>> "There are four boxes to be used in defense of liberty: >>> soap, ballot, jury, and ammo. Please use in that order." >>> -Ed Howdershelt (Author, 1940) >>> If we desire respect for the law, we must first make the law respectable. >>> - Louis D. Brandeis >>> Genes Web page <http://geneslinuxbox.net:6309/> >>> _______________________________________________ >>> OpenSCAD mailing list >>> To unsubscribe send an email to discuss-leave@lists.openscad.org >>> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org > > Cheers, Gene Heskett. > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author, 1940) > If we desire respect for the law, we must first make the law respectable. > - Louis D. Brandeis > Genes Web page <http://geneslinuxbox.net:6309/> > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org
JB
Jordan Brown
Mon, Jul 18, 2022 5:04 PM

On 7/17/2022 1:47 PM, gene heskett wrote:

but I still need to see about the screw head socket on top of it.
And watching it form, its plain to see 40mm is too big, so I've
reduced it to 28mm and adjusted the rest to fit, but I think I've
found a bug, the ! in front of the sphere I expected to make it
transparent so I could see whats inside, but what it does do is
not helpful at all as it just turns it grey and solid.

"!" means "show only this object".  You probably mean "%", which means
"make this object transparent-gray, and don't include it in the final
model".

On 7/17/2022 1:47 PM, gene heskett wrote: > but I still need to see about the screw head socket on top of it. > And watching it form, its plain to see 40mm is too big, so I've > reduced it to 28mm and adjusted the rest to fit, but I think I've > found a bug, the ! in front of the sphere I expected to make it > transparent so I could see whats inside, but what it does do is > not helpful at all as it just turns it grey and solid. "!" means "show only this object".  You probably mean "%", which means "make this object transparent-gray, and don't include it in the final model".
GH
gene heskett
Mon, Jul 18, 2022 5:55 PM

On 7/18/22 13:07, Jordan Brown wrote:

On 7/17/2022 1:47 PM, gene heskett wrote:

but I still need to see about the screw head socket on top of it.
And watching it form, its plain to see 40mm is too big, so I've
reduced it to 28mm and adjusted the rest to fit, but I think I've
found a bug, the ! in front of the sphere I expected to make it
transparent so I could see whats inside, but what it does do is
not helpful at all as it just turns it grey and solid.

"!" means "show only this object".  You probably mean "%", which means
"make this object transparent-gray, and don't include it in the final
model".

I tried both, neither gave me the xray view I needed. I needed to
see the penetration of a cylinder into a sphere, the cylinder being the
socket space inside the sphere for the end of the dowel/handle that
plugs into the sphere. This is the knob on the ends of a vise handle
that keeps the handle from falling plumb out of the screw head
when the user lets go of the handle.

Simple concept,but drove OpenSCAD into very slow rendering in 22 lines
of code.  But it worked well. Unfortunately the printer bricked itself while
trying to fix a flow problem which was only 25% of the flow needed to
print the parts. Fun and games this isn't. Changing the main board in a
Prusa MK3S is not in my definition of fun. Digging post holes for new fence
is. I should do more of it, but at 87 I'd druther pay a younger person. :-)

Thanks, take care and stay well, jordan.

Cheers, Gene Heskett.

"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.

On 7/18/22 13:07, Jordan Brown wrote: > On 7/17/2022 1:47 PM, gene heskett wrote: >> but I still need to see about the screw head socket on top of it. >> And watching it form, its plain to see 40mm is too big, so I've >> reduced it to 28mm and adjusted the rest to fit, but I think I've >> found a bug, the ! in front of the sphere I expected to make it >> transparent so I could see whats inside, but what it does do is >> not helpful at all as it just turns it grey and solid. > "!" means "show only this object".  You probably mean "%", which means > "make this object transparent-gray, and don't include it in the final > model". > I tried both, neither gave me the xray view I needed. I needed to see the penetration of a cylinder into a sphere, the cylinder being the socket space inside the sphere for the end of the dowel/handle that plugs into the sphere. This is the knob on the ends of a vise handle that keeps the handle from falling plumb out of the screw head when the user lets go of the handle. Simple concept,but drove OpenSCAD into very slow rendering in 22 lines of code.  But it worked well. Unfortunately the printer bricked itself while trying to fix a flow problem which was only 25% of the flow needed to print the parts. Fun and games this isn't. Changing the main board in a Prusa MK3S is not in my definition of fun. Digging post holes for new fence is. I should do more of it, but at 87 I'd druther pay a younger person. :-) Thanks, take care and stay well, jordan. Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/>
JB
Jordan Brown
Mon, Jul 18, 2022 9:28 PM

On 7/18/2022 10:55 AM, gene heskett wrote:

I tried both, neither gave me the xray view I needed. I needed to
see the penetration of a cylinder into a sphere,

Like so?

difference() {
    %sphere(r=10);
    cylinder(r=5, h=20);
}
On 7/18/2022 10:55 AM, gene heskett wrote: > I tried both, neither gave me the xray view I needed. I needed to > see the penetration of a cylinder into a sphere, Like so? difference() { %sphere(r=10); cylinder(r=5, h=20); }
GH
gene heskett
Tue, Jul 19, 2022 12:05 AM

On 7/18/22 13:28, Jordan Brown wrote:

On 7/17/2022 1:47 PM, gene heskett wrote:

but I still need to see about the screw head socket on top of it.
And watching it form, its plain to see 40mm is too big, so I've
reduced it to 28mm and adjusted the rest to fit, but I think I've
found a bug, the ! in front of the sphere I expected to make it
transparent so I could see whats inside, but what it does do is
not helpful at all as it just turns it grey and solid.

"!" means "show only this object".  You probably mean "%", which means
"make this object transparent-gray, and don't include it in the final
model".

That does make it grey, but there's nothing transparent about it,
its solid grey and nothing inside it can be seen. It also fouls the first
argument of a difference(), making line 2 the base against which lines
3,4,5 are subtracted, definitely not useful.

This is last months AppImage.

2022.04.29.ai11816 (git 68c63f61b)

Thank you Jordan, take care and stay well.


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Cheers, Gene Heskett.

"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.

On 7/18/22 13:28, Jordan Brown wrote: > On 7/17/2022 1:47 PM, gene heskett wrote: >> but I still need to see about the screw head socket on top of it. >> And watching it form, its plain to see 40mm is too big, so I've >> reduced it to 28mm and adjusted the rest to fit, but I think I've >> found a bug, the ! in front of the sphere I expected to make it >> transparent so I could see whats inside, but what it does do is >> not helpful at all as it just turns it grey and solid. > "!" means "show only this object".  You probably mean "%", which means > "make this object transparent-gray, and don't include it in the final > model". > That does make it grey, but there's nothing transparent about it, its solid grey and nothing inside it can be seen. It also fouls the first argument of a difference(), making line 2 the base against which lines 3,4,5 are subtracted, definitely not useful. This is last months AppImage. 2022.04.29.ai11816 (git 68c63f61b) Thank you Jordan, take care and stay well. > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email todiscuss-leave@lists.openscad.org Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page<http://geneslinuxbox.net:6309/>