Thread: Drilling Bolt Hole Patterns

**TURNER** · 09-07-2005, 06:19 PM

Recently i have been toying and learning a bit of HTML and SCRIPTING. I have found this quite useful for making little helpful utilities. Here is the code for a little web based program that uses user input to calculate 'X' and 'Y' coordinates for hole centres.Copy it to an editor such as notepad and save the file with the extension .html then try it out. I am not an expert on browsers so i couldnt tell you if this works on any others than IE that i use.
Any feedback or comments would be great, hope this proves useful to someone.

<html>
<head>


<title>Bolt Circle Calculator</title>
<script language=vbscript>
option explicit
sub calc_onclick
dim vholes,vstart,vend,vpitch,vstart2,vpcr,vx,vy
vstart=document.frm1.start.value
vend=document.frm1.end.value
vpcr=document.frm1.pcr.value
vholes=document.frm1.holes.value
'error handling msgs
if (vend+0)<=(vstart+0) then
msgbox("End Angle Must Be Greater Than Start Angle")
exit sub
end if
if (vholes+0)<1.0 then
msgbox("Number Of Holes Must Be Greater Than Zero")
exit sub
end if
if (vpcr+0)<1.0 then
msgbox("Pitch Circle Radius Must Be Greater Than Zero")
exit sub
end if
vpitch=((vend+0)-(vstart+0))/((vholes+0)-1.0)
vpitch=formatnumber(vpitch,4)
vstart2=vstart

document.write("<html><head><title>Bolt Results</title></head>")
document.write("<body bgcolor=gray>")
document.write("<h1>Bolt Circle Results</h1>")
document.write("<table border=double bgcolor=#6464ff><tr><th colspan=2>You Entered:</th></tr>")
document.write("<tr><td align=right>Start Angle </td><td bgcolor=white>= "&vstart&"</td></tr>")
document.write("<tr><td align=right>End Angle </td><td bgcolor=white>= "&vend& "</td></tr>")
document.write("<tr><td align=right>PCR </td><td bgcolor=white>= "&vpcr& "</td></tr>")
document.write("<tr><td align=right>Number Of Holes </td><td bgcolor=white>= "&vholes&"</td></tr>")
document.write("<tr><td align=right>Calculated Pitch</td><td bgcolor=white>= "&vpitch&"</td></tr>")
document.write("</table>")
document.write("<strong>These Are The X&Y Coordinates<br>")
document.write("You can cut and paste from here</strong><br>")
document.write("<textarea cols=25 rows=18>")

do
vx=vstart2*3.14159265
vx=vx/180
vx=cos(vx)*vpcr
vx=formatnumber(vx,3)
vy=vstart2*3.14159265
vy=vy/180
vy=sin(vy)*vpcr
vy=formatnumber(vy,3)
document.write("X"&vx&" "&"Y"&vy&vbcrlf)
vstart2=(vstart2+0)+(vpitch+0)
vholes=(vholes+0)-1.0
loop until (vholes+0)<1.0
document.write("</textarea>")
document.write("</body></html>")
end sub
</script>
</head>
<body bgcolor="gray">
<form name="frm1">
<table border=double bgcolor=#6464ff>
<tr><th colspan="2" align="center"><h1>Bolt Circle Calculator</h1></th></tr>
<tr><th>Start Angle?</th><td><input type="text" name="start" value="0"></td></tr>
<tr><th>End Angle?</th><td><input type="text" name="end" value="180"></td></tr>
<tr><th>Pitch Circle Radius?</th><td><input type="text" name="pcr" value="100"></td></tr>
<tr><th>Number of holes?</th><td><input type="text" name="holes" value="19"></td></tr>
<tr><td colspan="2" align="center"><input type="button" name="calc" value="Calculate"></td></tr>
</table>
<form>
</body>
</html>

**JavaDog** · 09-07-2005, 08:00 PM

Nice. A 'RESET' button would be a nice addition.

**oldjohn** · 09-26-2005, 02:02 PM

G'day
How do you use the file TURNER?

**oldjohn** · 09-26-2005, 02:34 PM

Originally Posted by oldjohn

G'day
How do you use the file TURNER?

Got it. Thanks for the file.
John

**TURNER** · 09-29-2005, 01:34 PM

Originally Posted by JavaDog

Nice. A 'RESET' button would be a nice addition.

Here's a new version works all on one page, see what you think...

Again copy and paste all code below into notepad and save with extension .html

<html>
<head>


<title>Bolt Circle Calculator</title>
<script language=vbscript>
option explicit
dim vholes,vstart,vend,vpitch,vstart2,vpcr,vx,vy,vtxt1
vtxt1=""

'''''''''''''''''''''''''''''
' CALCULATE BUTTON CLICKED= '
'''''''''''''''''''''''''''''
sub calc1_onclick
vstart=document.frm1.start.value
vend=document.frm1.end.value
vpcr=document.frm1.pcr.value
vholes=document.frm1.holes.value
document.frm1.txt1.value=vtxt1&vbcrlf
'error handling msgs
if (vend+0)<=(vstart+0) then
msgbox("End Angle Must Be Greater Than Start Angle")
exit sub
end if
if (vholes+0)<2 then
msgbox("Number Of Holes Must Be Greater Than One")
exit sub
end if
if (vpcr+0)<1.0 then
msgbox("Pitch Circle Radius Must Be Greater Than Zero")
exit sub
end if
vpitch=((vend+0)-(vstart+0))/((vholes+0)-1.0)
vpitch=formatnumber(vpitch,4)
vstart2=vstart
document.frm1.pitch.value=vpitch
document.frm1.txt1.value=vtxt1+(vbcrlf&vholes&" holes from "&vbcrlf&vstart&" to "&vend&" degrees"&vbcrlf&"at "&vpitch&" degrees pitch"&vbcrlf&"on a "&vpcr&" pcr"&vbcrlf&vbcrlf)
do
vx=vstart2*3.14159265
vx=vx/180
vx=cos(vx)*vpcr
vx=formatnumber(vx,3)
vy=vstart2*3.14159265
vy=vy/180
vy=sin(vy)*vpcr
vy=formatnumber(vy,3)
vtxt1=document.frm1.txt1.value
document.frm1.txt1.value=vtxt1+("X"&vx&" "&"Y"&vy&vbcrlf)
vstart2=(vstart2+0)+(vpitch+0)
vholes=(vholes+0)-1.0
loop until (vholes+0)<1.0
end sub
'''''''''''''''''''''''''
' RESET BUTTON CLICKED= '
'''''''''''''''''''''''''
sub reset_onclick
document.frm1.start.value="0"
document.frm1.end.value="0"
document.frm1.pcr.value="0"
document.frm1.holes.value="0"
document.frm1.pitch.value="leave this"
document.frm1.txt1.value="Your results will be shown here..."
vtxt1=document.frm1.txt1.value
document.frm1.txt1.value=vtxt1&vbcrlf
vtxt1=""
end sub
</script>

</head>
<body bgcolor="gray">
<form name="frm1">
<table border="double" bgcolor="#6464ff">
<tr>
<td>
<table>
<tr><th colspan="2" align="center"><h1>Bolt Circle Calculator</h1></th></tr>
<tr><th>Start Angle?</th><td><input type="text" name="start" value="0"></td></tr>
<tr><th>End Angle?</th><td><input type="text" name="end" value="180"></td></tr>
<tr><th>Pitch Circle Radius?</th><td><input type="text" name="pcr" value="100"></td></tr>
<tr><th>Number of holes?</th><td><input type="text" name="holes" value="19"></td></tr>

<tr><th style="color:#804040">Calculated Pitch=</th><td><input type="text" name="pitch" value="leave this"></td></tr>
<tr><td align="center"><input style="" type="button" name="calc1" value="Calculate"></td>
<td align="center"><input type="button" name="reset" value="Reset"></td></tr>
</table>
</td>
<td rowspan=2>
<textarea cols=30 rows=32 name="txt1">Your results will be shown here...
</textarea>
</td>
</tr>
<tr border="0"><td border="0"><h3>Instructions.</h3><strong>
Fill in the input boxes above and then click CALCULATE
Your results will appear in the text area to the right,
where you will be able to use your mouse to select text
and cut, to paste into your program.<br><br>

By entering new data into the input boxes, and clicking
CALCULATE again, you will add more code to the end of the
existing code.<br><br>

By pressing RESET all the boxes will be cleared for a fresh
start
</strong><br></td></tr>
</table>

<form>
</body>
</html>

**cp8071** · 09-29-2005, 06:26 PM

Cool! But I got strange results with inputs: 0,360,100,4

So I changed this line:
vpitch=((vend+0)-(vstart+0))/((vholes+0)-1.0)

To this:
vpitch=((vend+0)-(vstart+0))/((vholes+0)-0.0)

And then got what I think are good results. Somebody check my math.

CP

**TURNER** · 09-30-2005, 10:40 AM

Originally Posted by cp8071

Cool! But I got strange results with inputs: 0,360,100,4

So I changed this line:
vpitch=((vend+0)-(vstart+0))/((vholes+0)-1.0)

To this:
vpitch=((vend+0)-(vstart+0))/((vholes+0)-0.0)

And then got what I think are good results. Somebody check my math.

CP

Hi cp,
Good Point..
I think to get the results you were after, your entry that was
inputs: 0,360,100,4 should have been: 0,270,100,4 this is because
the "End Angle" is actually the angle of your last hole. Lets say you
wanted to have a start hole at 0 and an end hole at 90 with one
in the middle, your entry woulld be:0,90,100,3..calc pitch=45.000
maybe a little confusion with instructions needs modifying.
If you use it in a different way maybe i could add other options?

Turner.

**cp8071** · 09-30-2005, 01:28 PM

Ok, I see my mistake as trying to use it to do bolt circles with the input data: 0-360 degrees every time. If I want the first hole to be top-right then I have to start at 45 and end at 315 (for a 4 bolt pattern.)

I think it would be useful to have a collection of calculators for generating these patterns when you have different input information.

Less than a full circle (specify start/end angles)
Full circle (only radius and hole # inputs)
Pattern where I have distance between and number of holes only

CP

**TURNER** · 10-03-2005, 09:28 AM

Originally Posted by cp8071

Ok, I see my mistake as trying to use it to do bolt circles with the input data: 0-360 degrees every time. If I want the first hole to be top-right then I have to start at 45 and end at 315 (for a 4 bolt pattern.)

I think it would be useful to have a collection of calculators for generating these patterns when you have different input information.

Less than a full circle (specify start/end angles)
Full circle (only radius and hole # inputs)
Pattern where I have distance between and number of holes only

CP

I was thinking the same thing, i've modified the program again so it works slightly different depending on how you fill in the Data. Instructions have also been updated to try and make clear how it works.
Turner.

New Source Code
--------------------------

<html>
<head>


<title>Bolt Circle Calculator</title>
<script language=vbscript>
option explicit
dim vholes,vstart,vend,vpitch,vstart2,vpcr,vx,vy,vtxt1
vtxt1=""

'''''''''''''''''''''''''''''
' CALCULATE BUTTON CLICKED= '
'''''''''''''''''''''''''''''
sub calc1_onclick
vstart=document.frm1.start.value
vend=document.frm1.end.value
vpcr=document.frm1.pcr.value
vholes=document.frm1.holes.value
document.frm1.txt1.value=vtxt1&vbcrlf
'error handling msgs
if (vend+0)<=(vstart+0) then
msgbox("End Angle Must Be Greater Than Start Angle")
exit sub
end if
if (vholes+0)<2 then
msgbox("Number Of Holes Must Be Greater Than One")
exit sub
end if
if (vpcr+0)<1.0 then
msgbox("Pitch Circle Radius Must Be Greater Than Zero")
exit sub
end if
vpitch=((vend+0)-(vstart+0))/((vholes+0)-1.0)
if vstart=0 then
if vend=360 then
vpitch=360/vholes
end if
end if
vpitch=formatnumber(vpitch,4)
vstart2=vstart
document.frm1.pitch.value=vpitch
if vstart=0 then
if vend=360 then
document.frm1.txt1.value=vtxt1+(vbcrlf&vholes&" holes equispaced "&vbcrlf&"at "&vpitch&" degrees pitch"&vbcrlf&"on a "&vpcr&" pcr"&vbcrlf&vbcrlf)
else
document.frm1.txt1.value=vtxt1+(vbcrlf&vholes&" holes from "&vbcrlf&vstart&" to "&vend&" degrees"&vbcrlf&"at "&vpitch&" degrees pitch"&vbcrlf&"on a "&vpcr&" pcr"&vbcrlf&vbcrlf)
end if
else
document.frm1.txt1.value=vtxt1+(vbcrlf&vholes&" holes from "&vbcrlf&vstart&" to "&vend&" degrees"&vbcrlf&"at "&vpitch&" degrees pitch"&vbcrlf&"on a "&vpcr&" pcr"&vbcrlf&vbcrlf)
end if

vtxt1=document.frm1.txt1.value
do
vx=vstart2*3.14159265
vx=vx/180
vx=cos(vx)*vpcr
vx=formatnumber(vx,3)
vy=vstart2*3.14159265
vy=vy/180
vy=sin(vy)*vpcr
vy=formatnumber(vy,3)
document.frm1.txt1.value=vtxt1+("X"&vx&" "&"Y"&vy&vbcrlf)
vtxt1=document.frm1.txt1.value
vstart2=(vstart2+0)+(vpitch+0)
vholes=(vholes+0)-1.0
loop until (vholes+0)<1.0
end sub
'''''''''''''''''''''''''
' RESET BUTTON CLICKED= '
'''''''''''''''''''''''''
sub reset_onclick
document.frm1.start.value="0"
document.frm1.end.value="0"
document.frm1.pcr.value="0"
document.frm1.holes.value="0"
document.frm1.pitch.value="leave this"
document.frm1.txt1.value="Your results will be shown here..."
vtxt1=document.frm1.txt1.value
document.frm1.txt1.value=vtxt1&vbcrlf
vtxt1=""
end sub
</script>

</head>
<body bgcolor="gray">
<form name="frm1">
<table border="double" bgcolor="#6464ff">
<tr>
<td>
<table>
<tr><th colspan="2" align="center"><h1>Bolt Circle Calculator</h1></th></tr>
<tr><th>Start Angle?</th><td><input type="text" name="start" value="0"></td></tr>
<tr><th>End Angle?</th><td><input type="text" name="end" value="180"></td></tr>
<tr><th>Pitch Circle Radius?</th><td><input type="text" name="pcr" value="100"></td></tr>
<tr><th>Number of holes?</th><td><input type="text" name="holes" value="19"></td></tr>

<tr><th style="color:#804040">Calculated Pitch=</th><td><input type="text" name="pitch" value="leave this"></td></tr>
<tr><td align="center"><input style="" type="button" name="calc1" value="Calculate"></td>
<td align="center"><input type="button" name="reset" value="Reset"></td></tr>
</table>
</td>
<td rowspan=2>
<textarea cols=30 rows=36 name="txt1">Your results will be shown here...
</textarea>
</td>
</tr>
<tr border="0"><td border="0"><h3>Instructions.</h3><strong>
Fill in the input boxes above and then click CALCULATE.
Your results will appear in the text area to the right,
where you will be able to use your mouse to select text
and cut, to paste into your program.<br><br>

By entering new data into the input boxes, and clicking
CALCULATE again, you will add more code to the end of the
existing code.<br><br>

By pressing RESET all the boxes will be cleared for a fresh
start.<br><br>

START ANGLE=first hole and END ANGLE=last hole.<br>
If you enter START ANGLE=0 and END ANGLE=360 then
program will calculate equispaced holes.<br>
Note! First hole is at 3 o'clock, and holes travel anti-clockwise.
</strong><br></td></tr>
</table>

<form>
</body>
</html>

**oldjohn** · 10-04-2005, 01:47 PM

Originally Posted by TURNER

Hi cp,

If you use it in a different way maybe i could add other options?

Turner.

G'day TURNER
Would it be too much to ask if you could add an option for Centre of Circle coordinates?
If not it's still ok for me.

Regards
John

**TURNER** · 10-04-2005, 04:00 PM

Originally Posted by oldjohn

G'day TURNER
Would it be too much to ask if you could add an option for Centre of Circle coordinates?
If not it's still ok for me.

Regards
John

Hi John,
Please explain further, Sorry don't understand what your asking for??
Turner.

**oldjohn** · 10-04-2005, 04:49 PM

Hi TURNER
What I mean is the X,Y coordinates of the bolt hole circle. As if I wanted to drill two hole circles in two different locations. see attached file.
Thank you
John
I think it was the wrong format. here it goes again.

**TURNER** · 10-05-2005, 12:09 PM

Hi John,
Good idea!
Heres the new html src code, copy it and overwrite your original file.
Please let me know how it goes.

src code.......

<html>
<head>

<title>Bolt Circle Calculator</title>
<style type="text/css">
body
{background-color:#407288;}
table
{border-style:none;background-color:#407288;}
.buttons
{background-color:#48bb48;width:"100%"}
</style>
<script language="vbscript">
option explicit
dim vholes,vstart,vend,vpitch,vstart2,vpcr,vx,vy,vtxt1
dim xcent,ycent
vtxt1=""
'''''''''''''''''''''''''''''
' CALCULATE BUTTON CLICKED= '
'''''''''''''''''''''''''''''
sub calc1_onclick
vstart=document.frm1.start.value
vend=document.frm1.end.value
vpcr=document.frm1.pcr.value
vholes=document.frm1.holes.value
xcent=document.frm1.xcent.value
ycent=document.frm1.ycent.value
xcent=formatnumber(xcent,3)
ycent=formatnumber(ycent,3)
document.frm1.txt1.value=vtxt1&vbcrlf
'error handling msgs
if (vend+0)<=(vstart+0) then
msgbox("End Angle Must Be Greater Than Start Angle")
exit sub
end if
if (vholes+0)<2 then
msgbox("Number Of Holes Must Be Greater Than One")
exit sub
end if
if (vpcr+0)<1.0 then
msgbox("Pitch Circle Radius Must Be Greater Than Zero")
exit sub
end if
vpitch=((vend+0)-(vstart+0))/((vholes+0)-1.0)
if vstart=0 then
if vend=360 then
vpitch=360/vholes
end if
end if
vpitch=formatnumber(vpitch,3)
vstart2=vstart
document.frm1.pitch.value=vpitch
if vstart=0 then
if vend=360 then
document.frm1.txt1.value=vtxt1+(vbcrlf&vholes&" holes equispaced "&vbcrlf&"at "&vpitch&" degrees pitch"&vbcrlf&"on a "&vpcr&" pcr"&vbcrlf&"Origin=X"&xcent&" Y"&ycent&vbcrlf&vbcrlf)
else
document.frm1.txt1.value=vtxt1+(vbcrlf&vholes&" holes from "&vbcrlf&vstart&" to "&vend&" degrees"&vbcrlf&"at "&vpitch&" degrees pitch"&vbcrlf&"on a "&vpcr&" pcr"&vbcrlf&"Origin=X"&xcent&" Y"&ycent&vbcrlf&vbcrlf)
end if
else
document.frm1.txt1.value=vtxt1+(vbcrlf&vholes&" holes from "&vbcrlf&vstart&" to "&vend&" degrees"&vbcrlf&"at "&vpitch&" degrees pitch"&vbcrlf&"on a "&vpcr&" pcr"&vbcrlf&"Origin=X"&xcent&" Y"&ycent&vbcrlf&vbcrlf)
end if
vtxt1=document.frm1.txt1.value
do
vx=vstart2*3.14159265
vx=vx/180
vx=cos(vx)*vpcr
vx=vx+xcent
vx=formatnumber(vx,3)
vy=vstart2*3.14159265
vy=vy/180
vy=sin(vy)*vpcr
vy=vy+ycent
vy=formatnumber(vy,3)
document.frm1.txt1.value=vtxt1+("X"&vx&" "&"Y"&vy&vbcrlf)
vtxt1=document.frm1.txt1.value
vstart2=(vstart2+0)+(vpitch+0)
vholes=(vholes+0)-1.0
loop until (vholes+0)<1.0
end sub
'''''''''''''''''''''''''
' RESET BUTTON CLICKED= '
'''''''''''''''''''''''''
sub reset_onclick
document.frm1.start.value="0"
document.frm1.end.value="0"
document.frm1.pcr.value="0"
document.frm1.holes.value="0"
document.frm1.pitch.value="leave this"
document.frm1.txt1.value="Your results will be shown here..."
vtxt1=document.frm1.txt1.value
document.frm1.txt1.value=vtxt1&vbcrlf
vtxt1=""
end sub
''''''''''''''''''''''''''''''''
' INSTRUCTIONS BUTTON CLICKED= '
''''''''''''''''''''''''''''''''
sub instruct_onclick
vtxt1=""
vtxt1=vtxt1+"INSTRUCTIONS."&vbcrlf
vtxt1=vtxt1+"Fill in the input boxes above and then click CALCULATE. "&vbcrlf
vtxt1=vtxt1+"Your results will appear in the text area HERE!!, "
vtxt1=vtxt1+"where you will be able to use your mouse to select text "
vtxt1=vtxt1+"and cut, to paste into your program."&vbcrlf&vbcrlf

vtxt1=vtxt1+"By entering new data into the input boxes, and clicking "
vtxt1=vtxt1+"CALCULATE again, you will add more code to the end of the "
vtxt1=vtxt1+"existing code."&vbcrlf&vbcrlf

vtxt1=vtxt1+"By pressing RESET all the boxes will be cleared for a fresh "
vtxt1=vtxt1+"start."&vbcrlf&vbcrlf

vtxt1=vtxt1+"START ANGLE=first hole and"&VBCRLF&"END ANGLE=last hole."&vbcrlf
vtxt1=vtxt1+"If you enter START ANGLE=0 and END ANGLE=360 then the "
vtxt1=vtxt1+"program will calculate equispaced holes. "
vtxt1=vtxt1+"Note! First hole is at 3 o'clock, and holes travel anti-clockwise. "&vbcrlf&vbcrlf
vtxt1=vtxt1+"By entering values in 'Shift Origin X & Y ', You could replicate multiple/offset patterns."&vbcrlf&vbcrlf&vbcrlf
document.frm1.txt1.value=vtxt1
vtxt1=""
end sub
</script>
</head>
<body>
<form name="frm1">
<table>
<tr>
<td>
<table>
<tr><th colspan="2" align="center"><h1>Bolt Circle Calculator</h1></th></tr>
<tr><th>Start Angle?</th><td><input type="text" name="start" value="0"></td></tr>
<tr><th>End Angle?</th><td><input type="text" name="end" value="180"></td></tr>
<tr><th>Pitch Circle Radius?</th><td><input type="text" name="pcr" value="100"></td></tr>
<tr><th>Number of holes?</th><td><input type="text" name="holes" value="10"></td></tr>
<tr><th style="color:#804040">Calculated Pitch=</th><td><input type="text" name="pitch" value="leave this"></td></tr>
<tr><th colspan="2">Shift Origin, Centre Of Pcr</th></tr>
<tr><td align="center"><strong>'X'=</strong><input type="text" name="xcent" value="0" size="10"></td><td align="center"><strong>'Y'=</strong><input type="text" name="ycent" value="0" size="10"></td></tr>
<tr><td align="center"><input style="" type="button" name="calc1" value="Calculate" class="buttons"></td></tr>
<tr><td align="center"><input type="button" name="reset" value="** Reset **" class="buttons"></td></tr>
<tr><td colspan="2" align="center"><input type="button" name="instruct" value="? Show Instructions ?" class="buttons"></td></tr>
</table>
</td>
<td>
<textarea cols="45" rows="25" name="txt1" align="top">Your results will be shown here...
</textarea>
</td>
</tr>
</table>
<form>
</body>
</html>

Turner

**oldjohn** · 10-05-2005, 01:47 PM

Mate, you are a genius. I am impressed. Very good tool for programming.
Thank you very much.

John

**mcurtis** · 12-05-2005, 10:05 PM

Great program Turner. Found one small bug. If you enter a pitch radius less than 1, it brings up an error dialogue. I corrected the js with following change

was
if (vpcr+0)<1.0 then

changed to
if (vpcr+1)<1.0 then

and all works fine.

Thanks again
Maynard

**rcazwillis** · 12-05-2005, 11:47 PM

:cheers: Well done!

**TURNER** · 12-14-2005, 01:35 PM

Originally Posted by mcurtis

Great program Turner. Found one small bug. If you enter a pitch radius less than 1, it brings up an error dialogue. I corrected the js with following change

was
if (vpcr+0)<1.0 then

changed to
if (vpcr+1)<1.0 then

and all works fine.

Thanks again
Maynard

Sorry M.C. my mistake. With working in Metric would never have a pcr below '1', didnt think about imperial sizes, well spotted.

Cheers,Turner

**viper4297** · 01-03-2006, 01:49 AM

Thank you very much. This will come in very handy. Makes me want to learn more about html.

**MetalZilla** · 09-01-2013, 06:15 PM

How about using a windows based software calculator? Bolt Circle Calculator

**shags72** · 09-01-2013, 07:43 PM

I saved this out and the gui comes up but doesn't calculate after input. What am I doing wrong? I used notepad++ and saved as html and clicked the file and it brought it up.

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