John,
Here is a DeltaCad macro to draw the spiral of Archimedes.
There are 2 constants that you can change to change the spiral:
Factor = how far the revolutions of the spiral are apart. I.e., the a in
the formula r = a * Theta.
Revolutions = the number of spirals.
Note: there is a
Mac,
Using Internet Explorer everything looked fine to me.
++ron
- Original Message -
From: "Mac Oglesby" <[EMAIL PROTECTED]>
To:
Sent: Saturday, September 14, 2002 3:07 AM
Subject: RE: seeking for an azimuth software
>
> Hello David,
>
> I went to the web site you mention but fo
Since we limit the size of attachments I will just explain the cartoon strip.
A hip young couple is standing in front of a horizontal sundial. On the other
side of the dial is a older man in bib overalls and a baseball cap saying,
"This my dear, is a sundial. As the sun moves, it casts a shad
John,
I have worked with and used products from Colonial Brass. I won't characterize
them or their products as bogus.
++ron
- Original Message -
From: "John Carmichael" <[EMAIL PROTECTED]>
To: "Sundial List"
Sent: Tuesday, August 13, 2002 8:44 AM
Subject: Beware messages from Colon
John,
I use a similar technique. I usually say something like:
"A watch is based on, an imaginary earth that is traveling in a perfectly round
orbit, and is not tilted. The sundial is based on the real earth traveling
around the real sun."
Most people seem to vaguely remember that orbits ar
>Noon itself derives originally from "nine" or the ninth hour after
>sunrise (probaby 3pm :-) and not when it is apparently highest in the sky.
Now isn't that interesting. By coincidence or not, the noon hour on old
Japanese dials and clocks is 9. There are a couple of math models that explain
John,
It my understanding the the Minnamimura gnomon height is 37.3 meters.
This issue of the largest is a tough one but one that a lot of diallist and
non-diallist alike are interested in. Maybe NASS should undertake documenting
the dimensions of the larger dials and post it on the web si
tony,
The 3D model sounds like something I've been mulling over for years. Please
send me a copy too.
Cheers,
++ron
- Original Message -
From: "Tony Moss" <[EMAIL PROTECTED]>
To: "Sundial Mail List"
Sent: Friday, June 14, 2002 2:41 AM
Subject: Re: seminar
> Greg,
> >
> >I have
John and Fer,
When I was working on a design for a customer, I thought of using a large cube.
The cube would be oriented so that it rested on one point, and one edge would
be on very top and serve as the gnomon. Then I realized that I really had 3
gnomons, the one on the very top, and two ot
John,
If the DeltaCad macro use Fer's calculations for finding the points, then I
think the modification can be done easily. Which version of code are you using?
++ron
- Original Message -
From: "John Carmichael" <[EMAIL PROTECTED]>
To:
Sent: Monday, April 15, 2002 3:05 PM
Subject:
Bill,
Nice and clear description, and no math!
++ron
- Original Message -
From: <[EMAIL PROTECTED]>
To:
Sent: Tuesday, April 02, 2002 9:51 AM
Subject: Sawyer Equant
> I put a few sketches of why the Sawyer Equant dial works on my website at
> www.precisionsundials.com/why it works
Anselmo,
In the general you are correct. In English
they basically mean the same.
My dictionary says that slope is the "degree of deviation
from the horizontal.: Whereas "inclination is the degree of deviation from
a definite direction, especially from the horizontal or vertical."
Fenando,
I agree that the forwarding of virus alerts are the best way to spread hoaxes
and should be curbed. After all, a hoax is a bad meme, and spreading it does
no one any good.
However, I must disagree that you should supress the news of a real virus that
has infected your computer. J
Title: Message
I don't know about others, but I use 365 points to get a
pretty good approximation
++ron
- Original Message -
From:
Anselmo Pérez
Serrada
To: Sundial,
Mailinglist
Sent: Monday, January 21, 2002 2:40
PM
Subject: Re: On Bezier Curves and
anale
Andrew,
The sundial list has served a dual purpose. The last note I got from Judith
said that she was going to use the original method of marking the ceiling,
using the new dates that I suggested. And, the discussion that followed seemed
to be interesting to a lot of people on the list. Look
Mike, Luke,
I was saying, on a few of the days that the EOT is 0, look at your watch and
mark the ceiling right on the hour. And then connect all of the like hours
dots you will build a dial that works and is corrected for longitude, but not
EOT. The hour lines are simple straight ones, (tha
Judith,
I've never built a ceiling dial, but something doesn't sound right about the
advice that you got. The days that you choose should be days where the
"equation of time is 0 (sun time and watch time agree). This happens 4 times a
year. April 15, June 14, Sept 1, Dec 25. (sorry I shoul
Fred,
I was just hit by a virus called '[EMAIL PROTECTED]'. I think it came from
some one on the mailing list. I have cleaned it up. It's a sick world.
++ron
- Original Message -
From: Fred Sawyer
To: Ron Anthony
Sent: Thursday, November 29, 2001 7:
Tony,
Sorry Tony, only test message are allow thru.
++ron
- Original Message -
From: "Tony Moss" <[EMAIL PROTECTED]>
To: "Sundial Mail List"
Sent: Tuesday, November 27, 2001 3:06 PM
Subject: Test Message - please ignore
> I think I've been excommunicated from the List again as I've
All,
I have use David's software in conjuction with DeltaCad
calculation and found it to be very accurate and useful. If you have
a need of sundial routines for your programs you should check it out. It
works with many programing languages.
++ron
- Original Message -
Fro
For those of you who saw Tony Moss' excellent demonstration of Adobe
Illustrator, you might be interested in knowing that you can get a FREE copy of
TurboCad that will do many of the things that AI does. I'm not saying better,
but almost as good, and definately cheaper. Check it out at
http:
Bob,
As always, it was a pleasure to see you, and the progress of your work in
digital dialling. Also as alway, the trip home is filled with thoughts
(daydreams?) of the dials that could be build. For what its worth, the one
thought that I had in connection with your vertical digital design
John,
I have Earthlink which Mindspring is a part of i
think. I have been using thier Spaminator product for about a year
now. For the first few months I would go to their web site and review the
mail they thought was spam. In 3 months of checking they never tossed
something that I thou
New Englanders,
I will flying into Manchester NH Saturday night Sept 8th. I was planning to
drive to Montreal on Sunday, but I thought I would ask if there are any
interesting alternatives such as trains, or if someone might want to share a
ride.
++ron
Tony,
I have several CAD and drawing programs that can all create vary degrees of DXF
files, some better than others. Let me know what formats you can produce it
in, I'll let you which I can accept. Also check with the vendor and see if
they will accept any other format. I have real good lu
Günther ,
You have hit on one of my pet interest. I am always
thrilled and amazed when I hear someone pronunce a word that I have only read
before, especially if they use it in a conversation. Just guessing,
"Ott-red" or "Ot-tread".
++ron
- Original Message -
From:
Francois,
I would be glad to send you a list a some pictures of the dials that I know
about in the San Francisco area.
++ron
- Original Message -
From: François Blateyron <[EMAIL PROTECTED]>
To:
Sent: Tuesday, May 29, 2001 10:37 AM
Subject: travels and sundials
> Dear all
>
> 1)
All,
A while back I mentioned that I was asked to consult on a movie called the "The
Sundial Fields". Well the shooting is complete. The movie will be a 20 minute
or so love story about a sundial maker who loses his lover by accident/murder.
The scenes were set in a small town in 1929 and 1
Just a test
Earthlink,
If there are any Earthlink.net user than can send to this mail list ok, please
post a message. I am trying to troubleshoot a problem that many of Earthlink
user are having on this list.
Thanks
++ron
All,
The other day I heard on the radio that some politcians has proposed a 2 hour
Daylight Savings Time offset to save energy.
++ron
Tony,
My term for these are "Sundials that aren't"
It usually invoke the response "Aren't what?" to which I reply "Sundials". It
leaves them very confused.
++ron
--Original Message--
From: Tony Moss <[EMAIL PROTECTED]>
To: Sundial Mail List
Sent: December 8, 2000 6:57:29 PM GMT
Su
All,
I am working with a noted local artist to design a large (say a 30 foot
diameter circle) sundial. It is expected to be a serious piece of art. His
first priority is to make it a sculpture, and secondly a sundial.
If you have any favor ideas, designs or existing dials that you think fit
All,
Is there anybody in the Seattle/Tacoma area that could help out with this dial
problem?
++ron
--Original Message--
From: Lynette Miller <[EMAIL PROTECTED]>
To: 'Ron Anthony' <[EMAIL PROTECTED]>
Sent: October 25, 2000 4:40:42 PM GMT
Subject: RE: bent
Help,
I'm away from my notes, and I need the degree values needed to draw the 6 lines
of declination for the entry into each of the Zodiac.
Anyone have the values handy?
++ron
John and all DeltaCad users,
Why don't you take the DeltaCad code for Horizontal #7 and add in an option for
beaded analemmas instead of the straight hour lines?
++ron
PS: If no one steps up to the task I will do it for you.
--Original Message--
From: [EMAIL PROTECTED] (John Carmic
Just a test
--Original Message--
From: Ron Anthony <[EMAIL PROTECTED]>
To: Steve Lelievre <[EMAIL PROTECTED]>
Sent: September 18, 2000 2:28:25 PM GMT
Subject: RE: How do I turn my DeltaCad design into reality? Machine cutting
question
Steve,
This is one of the most frustrating aspect
09, 2000 9:56 PM
Subject: Re: head nodus
> Hi Dave,
>
> You are correct in your conclusions that analemmatic designs have hour
> points rather than hour lines and a universal analemmatic design would
> require a series of nested dials.
>
> Fred Sawyer and Ron Anthony collaborat
All
> John Carmichael wrote:
> >
> >
> > 2. To determine longitude at sea, Harrison's clock was carried on board
a
> > ship traveling west. The clock was set before the journey to show
apparent
> > solar time in Greenwich. The difference between local solar time on the
> > ship and the time on
Left Coasters,
Note: A&E is now a dual feed station. So when the adverts say "8pm/7
central" that means its on at 8:pm on the pacific coast. (Not 5 as it used
to be).
++ron
- Original Message -
From: Fritz Stumpges <[EMAIL PROTECTED]>
To:
Sent: Monday, July 10, 2000 1:23 PM
Subject:
Steve,
I saw a student design that was similar made from a water bottle. The water
was used to set the Latitude by tilting the bottle, and the hour markings
were on the underside of the bottle.
++ron
- Original Message -
From: Andrew James <[EMAIL PROTECTED]>
To: 'Steve Lelievre' <[EM
Gordon,
Someone posted this URL on the NASS message board.
www.interiorsundials.bigstep.com Its a company in England that designs
ceiling dials.
++ron
- Original Message -
From: Gordon Watson <[EMAIL PROTECTED]>
To:
Sent: Tuesday, May 02, 2000 9:10 AM
Subject: Ceiling Dials
> Greet
All,
All 20 copies of DeltaCad that I ordered last month
have been bought. I will be placing a second order for 10 more copies
today. The price is still $35 for US and $40 for overseas. (A
$10 savings) Visit their website www.dcad.com to get a demo copy.
++ron
read the help section on calls.
++ron
- Original Message -
From: fer j. de vries <[EMAIL PROTECTED]>
To: Ron Anthony <[EMAIL PROTECTED]>; Sundial Mailing list Sundial
Sent: Tuesday, April 25, 2000 2:19 AM
Subject: Re: DeltaCad , NASS logo
> Ron Anthony and others,
>
All,
I have attached the source code to draw the NASS logo in DeltaCad. It has
some interesting subroutines:
. routines that do trig functions in degrees rather than radians.
. modified DeVires' fomula to use degrees rather than radians.
. Uses some of Fred Saywer's formulas to draw lines
Thibaud,
Thanks for the pointer. It goes to show that there is nothing new under the
sun.
I do have BASIC script that draws the logo. I will convert it to DeltaCad.
++ron
- Original Message -
From: T.& M. Taudin-Chabot <[EMAIL PROTECTED]>
To:
Sent: Sunday, April 09, 2000 1:15 AM
Su
Bob,
To me it appears that the two files are similar. When I look at the two
files I see the same types of commands except the HPGL commands are
separated by semicolon.
In my PCL5 book from HP it defines HP-GL as a vector graphics language. (In
fact most of my old dials are written in it.) It
Steve,
There is some confusion here, (and in the file conversion world) about HPGL
which technically is a graphic language for the HP printers, and HP plotter
files. Bob's technique works for plotters or PLT type files. I tried an
HPGL dummy printer and none of my programs could view it.
Now t
All,
I tried Bob Terwilliger's method for creating HP plotter files from DeltaCad
and it works well with DeltaCAD and Windows 98. Windows 95 should not be too
different.To get to the "add printer" wizard: From the START button,
select SETTINGS, PRINTER, and then ADD PRINTER.
Once the printe
All,
I have shipped 16 of the 20 copies of DeltaCad that I ordered.
Attached is a script I wrote to draw a noon mark for a dial that that has
the aperture at 36.125 " above a dial face that sits in the plane of the
poles. I think that its accurate, but we have not built anything with it
yet. F
John,
Great stuff. I have been outsourcing all of my anodized worked. Especially
since they can do a brass - like color, but your success encourages me to bring
my one of a kind work home.
Are you saying that you use a positive mask?, i.e., Black lines on a clear
field. If so that's great
Sara,
I have taken your classification and restructured it into a language called
Backus-Naur that is used to describe languages, descriptions, sentences,
etc. I have taken the liberty of adding a few descriptions, but this is
basically yours. It looks cumbersome but it isn't too bad. It is a wa
All,
Forgot to include my address.
Ron Anthony
3956 Kauri Ct
Concord, CA 94521
++ron
All,
I made a quantity purchase of DeltaCADs They were $29.99 each. We save $10.
They arrived today.
If you would like a one please email me or send me a letter and I will send
a copy out. I'll make the shipping the same as Midnight Software did. If
there are any extra pennies left over I w
All,
PLEASE NOTE: Version 4.0 For WindowsT 95, 98, NT(4.0), or 2000
NO WINDOWS 3.1 or MAC.
DeltaCAD has two offers:
Standard Quanity discount: 10 copies bought at once for $29.99 ($10
savings)
For Us: 50 copies bought at once for $24.99.
In both cases;
. It includes the CD and manu
Bob,
Attached is a small DeltaCad program to draw the EOT. Much of it is derived
from a program Steve Leliever posted last week. It should be easy enough to
understand, and it contains some new features that I wanted to play with.
++ron
- Original Message -
From: Robert Terwilliger <[
John,
> I think it's wonderful that you took the innitiative to check into group
> rate prices for DeltaCad. Of course it doesn't help me much since I
already
> paid full price, but I don't care. I would gladly have paid double the
> price to acquire this great program.
Good point. If those of
All,
Today, I have written to Midnight Software the maker of DeltaCad about a
special group rate for the worldwide sundial community. Currently two
discounts are available:
10 copies on CD and hard copy manuals for $29.00 +
25 copy site license on a single CD with one printed manual for $19.99
Tony,
I have not worked with Illustrator yet. Does it have a programing language
built into it for generating drawing based on user input. That's one thing
that many of these CAD programs have that drawing programs don't.
++ron
- Original Message -
From: Tony Moss <[EMAIL PROTECTED]>
All,
I have used both of them. I'm the poerson that encouraged the developer of
DeltaCad to add Cypress's Enable CAD.
DeltaCAD was a shareware program until the programing capabilities were added.
As such, it's not too sophisticated of a program. That's not meant to imply
that that it's
Thibauld,
Thanks for the correct issue number. Now how could I have possibly keyed in
the wrong date? I see. The date and volume # are wrong on that single
page.
++ron
- Original Message -
From: T.& M. Taudin-Chabot <[EMAIL PROTECTED]>
To: Ron Anthony <[EMAIL PROTE
All,
Do you know if the following dial has ever been built?
Yvone Masse's design described as the second dial in his article "Two Mean
Analemmatic Sundials" in the NASS Compendium of December 1997. I am most
interested in the dial shown in figure 6 which can be corrected for EOT,
DST, and Longi
All,
I think a multiface dial would be the most practical way to go.
However, what kind of shadows would be cast by a sphere (say double the size
of the cylinder) impaled on the tower?
++ron
- Original Message -
From: Roger Bailey <[EMAIL PROTECTED]>
To: Alain MORY <[EMAIL PROTECTED]
Bob,
I love that picture. I have a 16"x20" color photo of it in my office. It's
clear that the foreground was added: 1). There is only one shadow for the
chimney, 2) the sun is behind the house, but the shadow of the chimney is
cast by a sun that would be in the foreground.
I thought I had a
Art,
If you look at Fred Sawyer's Hectemoros dial you will see a similar concept
to yours. (That is, for every date and time combination, draw a unique
point.) Fred has also included; moving the dial face and the shadow
casting point.
In the Dali dial could/does a nodus indicate automatically
Warren,
Thanks for the news that Delta CAD has a macro language now. I'll download
the demo and see how it looks. Can't go wrong for $40.
++ron
- Original Message -
From: Warren Thom <[EMAIL PROTECTED]>
To: Alexei Pace <[EMAIL PROTECTED]>
Cc:
Sent: Thursday, December 30, 1999 5:54 A
John,
> I suppose you're right. It would seem almost impossible to produce a
> sundial with the specs that I listed, at a low cost. But who knows, with
> today's modern manufacturing techniques, maybe it could be done.
>
> Thanks for your comments,
>
> John
I think you misinterpreted my intent
John,
>What the world needs are some beautiful, accurate and durable sundial
>designs that can be adjusted for any location, that tell Standard Time, and
>that can be mass-produced and marketed like the current garden variety.
>This would give these companies a run for their money, and would also
lt;[EMAIL PROTECTED]>; Ron Anthony
<[EMAIL PROTECTED]>
Cc: sundial@rrz.uni-koeln.de
Date: Wednesday, November 03, 1999 7:58 PM
Subject: Re: easy metal gnomons
>Youngstown Aluminum Products (Youngstown, Ohio)
><http://www.yapinc.com/contact.htm> has 1/4" quarter round li
John,
>Michael Koblic wrote:
>>1) How do you attach a 1/16" thick gnomon vertically to a dial plate?
>>Presumably you must bend the gnomon at the base somehow first.
>
>Although my string gnomons are quite different, I have made traditional
>triangular and rectangular gnomons for other dials. I
David,
Thanks for your efforts in bringing back this dial. Is there anyway that
one will be at the NASS conference this weekend?
++ron
-Original Message-
From: David R. Gagnon <[EMAIL PROTECTED]>
To: sundial@rrz.uni-koeln.de
Date: Tuesday, October 05, 1999 1:03 PM
Subject: SCHMOYER S
Patrick,
PMFJI. When designing a EOT plaque a few years ago. I struggled with this
question. In the end I chose the "dial fast/dial slow" labeling. Here is
my reasoning.
If I gave you a nice looking but somewhat erraticatic watch (the dial), and
said, "It works good but its 10 minutes fast"
Daniel,
A perfect compromise.
++ron
-Original Message-
From: Daniel Roth <[EMAIL PROTECTED]>
To: sundial@rrz.uni-koeln.de
Date: Monday, September 20, 1999 3:53 AM
Subject: large mails
>
>Dear Gnomonists of this mailing list!
>
>I will check out if it is possible to discard mails lar
Hi all,
For the past year I have been working on a project to make metal globes that
can be used outdoors. Here is where I am in this project.
. I am going to use a bowling ball as the core. It is low cost, has a high
degree of sphericity (sp), and has a nice heft to it.
. I found a sharewa
John,
>By the way have you looked at REALBasic as a development language for your
>program ? Or are you already using it if you have a PC version close ?
>
>I will shortly have available a set of Plugins which will run in
VectorWorks
>(CAD program) that produce Fers great algorithms for PC and Ma
Alexei,
I think any 2 part epoxy would be good. I have used it
to stick bronze plaques to brick walls. If any great amount of the epoxy
is visible (other that a hairline) you might want to look for one that has UV
stabilizer in it.
Devcon is one brand that you should be able to find
John,
I don't think you have the right approach. I just went through this for
making globes and this is what I came up with:
The radius of the lattitude circle in question is a function of the radius
earth. That is,
radius of x degree lattitude = cos(lattitude) *radius at equator.
If the ea
To all that have that have not made their
reservations yet.
I found that Hilton Hartford offers a rate
called the Bounceback for $79, $10 less than the conference rate. Only
catch is you can't specify a bed type. You get what they
have.
++ron
Bob,
Great job.
I especially like your treatment of the NASS logo. As shown, it would make
a nice piece of jewelry.
++ron
-Original Message-
From: Robert Terwilliger <[EMAIL PROTECTED]>
To: Sundial Mailing List
Date: Tuesday, June 22, 1999 9:57 AM
Subject: New NASS Pages on the Wor
Bx,By are the x,y coordinates of point B using A as the
origin. For example 0,10 if Point B was 100 meters north of A.
++ron
-Original Message-
From: John Carmichael <[EMAIL PROTECTED]>
To: Ron Anthony <[EMAIL PROTECTED]>
Cc: sundial@rrz.uni-koeln.de
Date: W
All,
I'm sorry I was only half awake when this thread started so forgive me if
I'm off course. If I had to lay out a large dial (say 100 ft) to a high
degree of accuracy (say .1 of an inch) I would plot all the points not as
x,y co-ordinates. I would plot them all out as the intersection of tw
Fer,
Thanks for the Capuchin drawing. It indeed would work and is easy to
construct. Three peices not counting the string. Two setup ajustments for
Latitude, and one adjustment for daily use. The dotted line that spans the
red box from top left to bottom right would probably have to be a bar w
Bob,
What a great dial. I have looked at the photos and have a few questions and
comments.
It appears there is an upper half of the meridian as you said. I suspect
this missing piece is the same shape and size (at least at its ends) as the
lower half of the merdian. This is evident by how the
Jim,
I too enjoy this list. What diversitity of ideas are contained here.
>>I am a professional product designer, concentrating on things visual and
>>aesthetic most of the time, but I am also a perpetual student as well.
>>Design is a game of analogies, and the more you know and are exposed to,
All,
After much investigation into gores for globes, I have found a few
items:
There is a public domain program call MicroCAM that run on windoze that can
draw many types of maps and globes. It has a mini language that allows you to
develop your own maps. A projection called Universal Transve
All,
>I'm interested in origin of the term "dead reckoning". I read somewhere
>that it came from "ded' reckoning" i.e. "deduced reckoning".
>
>Any thoughts?
>
My dictionary says 'From DEAD (probably "complete" "exact") because it is the
closest estimate possible'
++ron
Daniel,
Thanks for reminding me of your site. I really like your dials and would
like to see them up close.
The parameters of the globes that I have in mind are starting to take shape.
They are:
. semi vandal proof (thus the metal over solid plastic idea)
. 8" in diameter. (this is a goo
Forgive me if this is a duplicate message.
Tony,
Thank you for the detailed and helpful response.
>>GORES.SEA. Gores 'Self-expanding Archive' may have been compressed in
Disc >>Doubler on a Mac. ATT00018.DAT - doesn't sound Mac like!
Most of these types of programs use a table of data. The .D
Tony Moss, Luke Coletti, et al
Concerning my quest for an outdoor globe:
It appears that I will have to make them myself if I want one. I don't know
if I will have the skills to get it done. I have settled on an 8" diameter
globe made of brass colored anodized aluminum with black outlines of
perhaps a cartographer that
could help me I would be grateful.
Ron Anthony
latitude 38 57' longitude 122
Tex,
The short answer is no.
For dials that have a gnomon that points at the North star, the EOT
correction is done by rotating the dial face around that shadow casting
edge of the gnomon. For your horizonal dial, imagine a rod welded at the
top edge of the gnomon. The ends of the rod are supp
John,
I too struggled with the same problem. I think the more traditional way to
draw the graph is opposite of Waugh's and labeled Sun Fast and Sun Slow. I
too thought about using negative numbers but did not use them. I did not
see Waugh's when I did mine but it is similar. I used the follow
Roderick,
>>Does anyone know of a source for brass numbers. For the above sundial the
roman numbers would need to be about 25 mm high.<<
The best place to begin is a trade magazine such as SignCraft for the sign
making industry. They are full of ads for letters. For Brass 2"(56mm) and
1/4"
using the longer formulas from "Practical Astronomy with Your Calculator".
Thank you for your help. I have enjoyed this EOT discussion very much.
++ron
Ron Anthony
Concord California USA
Prof Gregorio,
>> As far as the Equation of Time is concerned, the last
edition of the Explanatory Supplement to the Astronomical
Almanac reports (pag. 484) the following algorithm:<<
Thank you for the algorithm. No matter how hard I try I cannot
make the algorithm yield the correct results. I
Francois,
I saw your equation of time question on the remailer list.
The equation that I use is from a book called "Practical
Astronomy with your Calculator" and is more involved. I
think that it is similar to yours but not sure. Here is what
I use I hope there are no transcription errors. For
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