#!/usr/bin/perl

# If you have a mill with a DRO, and/or a rotary table then you may find
# this script handy when dividing circle. To print the angles (in
# degrees, minutes and seconds) you just specify the number of
# divisions.
#
# If you want to calculate bolt hole pattern given a certain radius
# (assuming that coordinate (0,0) is the center of the circle), you give
# this script an optional argument --radius.
#
# Copyright(C) 2009, Igor Chudov.
# Distributed under the terms of the GNU PUBLIC LICENSE V2
#

use strict;
use warnings;

use Getopt::Long;

my $radius = undef;

GetOptions(
"r|radius=f", \$radius,
);

my $number = shift @ARGV || die "USAGE: $0 number";

$number =~ /^\d+$/ || die "USAGE: $0 number";;

foreach( my $i = 0; $i $number; $i++ ) {
my $angle = 360/$number*$i;

my $degrees = int( $angle );
my $minutes = int( ($angle - $degrees) * 60 );
my $seconds = int( int( ($angle - $degrees - $minutes/60)*60*60 ) );

my $xy = "";
if( $radius ) {
$xy = sprintf( ", x = %.4f, y = %.4f",
$radius * cos( $angle/360 ),
$radius * sin( $angle/360 )
);

}
print sprintf( "%d: %03d %02d' %02d\" (%f) %s\n", $i+1, $degrees, $minutes, $seconds, $angle, $xy );
}

scratch the old version, here's the new one

#!/usr/bin/perl

# If you have a mill with a DRO, and/or a rotary table then you may find
# this script handy when dividing circles. To print the angles (in
# degrees, minutes and seconds) you just specify the number of
# divisions.
#
# If you want to calculate bolt hole pattern given a certain radius
# (assuming that coordinate (0,0) is the center of the circle), you give
# this script an optional argument --radius.
#
# Copyright(C) 2009, Igor Chudov.
# Distributed under the terms of the GNU PUBLIC LICENSE V2
#

use strict;
use warnings;

use Getopt::Long;

my $radius = undef;
my $pi = 3.141592653589793;

GetOptions(
"r|radius=f", \$radius,
);

my $number = shift @ARGV || die "USAGE: $0 number";

$number =~ /^\d+$/ || die "USAGE: $0 number";;

foreach( my $i = 0; $i $number; $i++ ) {
my $angle = 360/$number*$i;

my $degrees = int( $angle );
my $minutes = int( ($angle - $degrees) * 60 );
my $seconds = int( int( ($angle - $degrees - $minutes/60)*60*60 ) );

my $xy = "";
if( $radius ) {
$xy = sprintf( ", x = %.4f, y = %.4f",
$radius * cos( 2*$pi*$angle/360 ),
$radius * sin( 2*$pi*$angle/360 )
);

}
print sprintf( "%d: %03d %02d' %02d\" (%f) %s\n", $i+1, $degrees, $minutes, $seconds, $angle, $xy );
}

Ignoramus7829 wrote:
#!/usr/bin/perl

# If you have a mill with a DRO, and/or a rotary table then you may find
# this script handy when dividing circle. To print the angles (in
# degrees, minutes and seconds) you just specify the number of
# divisions.
#
# If you want to calculate bolt hole pattern given a certain radius
# (assuming that coordinate (0,0) is the center of the circle), you give
# this script an optional argument --radius.
#
# Copyright(C) 2009, Igor Chudov.
# Distributed under the terms of the GNU PUBLIC LICENSE V2
#

use strict;
use warnings;

use Getopt::Long;

my $radius = undef;

GetOptions(
"r|radius=f", \$radius,
);

my $number = shift @ARGV || die "USAGE: $0 number";

$number = quality variable name.

On 2009-09-04, Cydrome Leader wrote:
my $number = shift @ARGV || die "USAGE: $0 number";

$number = quality variable name.

Update version

#!/usr/bin/perl

# If you have a mill with a DRO, and/or a rotary table then you may find
# this script handy when dividing circles. To print the angles (in
# degrees, minutes and seconds) you just specify the number of
# divisions.
#
# If you want to calculate bolt hole pattern given a certain radius
# (assuming that coordinate (0,0) is the center of the circle), you give
# this script an optional argument --radius.
#
# Copyright(C) 2009, Igor Chudov.
# Distributed under the terms of the GNU PUBLIC LICENSE V2
#

use strict;
use warnings;

use Getopt::Long;

my $radius = undef;
my $pi = 3.141592653589793;

GetOptions(
"r|radius=f", \$radius,
);

my $divisions = shift @ARGV || die "USAGE: $0 number";

$divisions =~ /^\d+$/ || die "USAGE: $0 number";;

foreach( my $i = 0; $i $divisions; $i++ ) {
my $angle = 360/$divisions*$i;

my $degrees = int( $angle );
my $minutes = int( ($angle - $degrees) * 60 );
my $seconds = int( int( ($angle - $degrees - $minutes/60)*60*60 ) );

my $xy = "";
if( $radius ) {
$xy = sprintf( ", x = %.4f, y = %.4f",
$radius * cos( 2*$pi*$angle/360 ),
$radius * sin( 2*$pi*$angle/360 )
);

}
print sprintf( "%d: %03d %02d' %02d\" (%f) %s\n", $i+1, $degrees, $minutes, $seconds, $angle, $xy );
}

Iggy, I bet many (like myself) wouldn't know how to run this script or input
data.

I have no real need as I know enough trig
(Some Old Horse Caught Another Horse Taking Oats Away)
to quickly sketch it out and run an excel speadsheet for the calcs.

Karl

Karl Townsend wrote:

Iggy, I bet many (like myself) wouldn't know how to run this script or input
data.

I have no real need as I know enough trig
(Some Old Horse Caught Another Horse Taking Oats Away)
to quickly sketch it out and run an excel speadsheet for the calcs.

Karl

Don't most DROs have bolt circle calculator functions built in anyway?

On 2009-09-04, Karl Townsend wrote:
Iggy, I bet many (like myself) wouldn't know how to run this script or input
data.

I have no real need as I know enough trig
(Some Old Horse Caught Another Horse Taking Oats Away)
to quickly sketch it out and run an excel speadsheet for the calcs.

That's pretty much what the script does, except that you do not need
to run a spreadsheet. It will work if you have Cygwin on Windows or
Activeperl installed.

i

"Pete C." wrote:

Don't most DROs have bolt circle calculator functions built in anyway?

New ones yes. My ancient Sony DRO's only know how to resolve to the nearest 0.0001" inch.

Overkill on a mill.

Wes

I have the first edition camel book - how close is this perl...

I have a perl to install but like ghostscript and postscript
I don't write in them, but have the manual :-)

Activeperl - wow - who wrote that!

I remember ftp-ing my copy from JPL. A long time ago. Sun 3 was a hot machine.

Martin

Ignoramus7829 wrote:
On 2009-09-04, Karl Townsend wrote:
Iggy, I bet many (like myself) wouldn't know how to run this script or input
data.

I have no real need as I know enough trig
(Some Old Horse Caught Another Horse Taking Oats Away)
to quickly sketch it out and run an excel speadsheet for the calcs.

That's pretty much what the script does, except that you do not need
to run a spreadsheet. It will work if you have Cygwin on Windows or
Activeperl installed.

i

fOn 2009-09-05, Martin H. Eastburn wrote:
I have the first edition camel book - how close is this perl...

I have a perl to install but like ghostscript and postscript
I don't write in them, but have the manual :-)

Activeperl - wow - who wrote that!

Activeperl is the easiest way to get perl on windows.

i

I remember ftp-ing my copy from JPL. A long time ago. Sun 3 was a hot machine.

Martin

Ignoramus7829 wrote:
On 2009-09-04, Karl Townsend wrote:
Iggy, I bet many (like myself) wouldn't know how to run this script or input
data.

I have no real need as I know enough trig
(Some Old Horse Caught Another Horse Taking Oats Away)
to quickly sketch it out and run an excel speadsheet for the calcs.

That's pretty much what the script does, except that you do not need
to run a spreadsheet. It will work if you have Cygwin on Windows or
Activeperl installed.

i

On Fri, 4 Sep 2009 16:37:33 -0500, "Karl Townsend"
wrote:

Iggy, I bet many (like myself) wouldn't know how to run this script or input
data.

I have no real need as I know enough trig
(Some Old Horse Caught Another Horse Taking Oats Away)
to quickly sketch it out and run an excel speadsheet for the calcs.

Karl

For those running Windows and don't know what to do with a
Perl script check out Marv Klotz's Utilities:

http://www.myvirtualnetwork.com/mklotz/#shop

He has two versions (maybe more) for doing a similar calc
for bolt circles:

"BOLTCIRC.ZIP (~31 Kbytes) 10/04/05
It's often easier and more accurate to lay out holes on a
boltcircle with x-y coordinates than to scribe and step off
the circle, especially if the number of holes is an unusual
number. This program does the work and generates a table
which you can print and carry to the drill press for
reference. See also CHORD."

"CHORD.ZIP (~19 Kbytes) 02/24/00
For those who insist on marking out subdivisions of a circle
the old-fashioned way and don't want to use BOLTCIRC, this
tool will compute the chord length needed to divide a circle
of input diameter into any number of parts. See also
BOLTCIRC."

--
Leon Fisk
Grand Rapids MI/Zone 5b
Remove no.spam for email

Ignoramus7829 wrote:

Activeperl - wow - who wrote that!

Activeperl is the easiest way to get perl on windows.

And what is wrong with Cygwin?

Wes

In the old days it was really a neat trip to install perl on
a unix box. The install was from all sources. It built it on the
fly and while building - it tested and determined - oh 16 bit machine
then oh - bits are reversed Lsb on the left.. and so forth.
Once the library was built, it ran some test cases. Some of those were
interesting to look at and figure how they worked.

We used it as a unix script writer and general good fun.
That is only 25 years ago more or less.

Martin

Ignoramus7829 wrote:
fOn 2009-09-05, Martin H. Eastburn wrote:
I have the first edition camel book - how close is this perl...

I have a perl to install but like ghostscript and postscript
I don't write in them, but have the manual :-)

Activeperl - wow - who wrote that!

Activeperl is the easiest way to get perl on windows.

i

I remember ftp-ing my copy from JPL. A long time ago. Sun 3 was a hot machine.

Martin

Ignoramus7829 wrote:
On 2009-09-04, Karl Townsend wrote:
Iggy, I bet many (like myself) wouldn't know how to run this script or input
data.

I have no real need as I know enough trig
(Some Old Horse Caught Another Horse Taking Oats Away)
to quickly sketch it out and run an excel speadsheet for the calcs.
That's pretty much what the script does, except that you do not need
to run a spreadsheet. It will work if you have Cygwin on Windows or
Activeperl installed.

i

On 2009-09-05, Wes wrote:
Ignoramus7829 wrote:

Activeperl - wow - who wrote that!

Activeperl is the easiest way to get perl on windows.

And what is wrong with Cygwin?

Wes

Nothing, I used Cygwin for a while when I was stuck with Windows at
work. Now I use Linux as my desktop OS and can use the real thing
without the pains of Windows (carriage returns, DOS window problems
etc). I have nothing against Cygwin, these guys did a fabulous job.

i

We used it as a unix script writer and general good fun.
That is only 25 years ago more or less.

So, did you have a T shirt that said, "Grep for it"

DOS had nothing like it at the time.

Karl

No - Cgrep

#!/usr/bin/perl
$context = 3;
if ($argv[0] =~ /^-(d+)$/) {
$context = $1;
shift;
}
$pat = shift;
$pat =~ S#/#\\/#g;
$_ =;
push($ary,$_);
for (1 .. $context) {
unshift(@ary,''};
}
eval loop_end;
while (\$ary [context]){
if (\$ary[$context] =~ /$pat/) {
print "------\n" if \$seq++;
print \@ary,"\n";
}
\$_ = if \$_;
shift(@ary);
push(\@ary,\$_);
}
LOOP_END

Something like that.

I see it is no longer a camel book - maybe Nutshell 'O'Reilly & Asso, Inc.
has those reserved. I have the 1991 first edition book - in GOOD condition,
but used :-)

Martin

Karl Townsend wrote:
We used it as a unix script writer and general good fun.
That is only 25 years ago more or less.

So, did you have a T shirt that said, "Grep for it"

DOS had nothing like it at the time.

Karl