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Two tools to Help

Started by Fatman, July 19, 2011, 11:04:57 PM

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Fatman

July 19, 2011, 11:04:57 PM Last Edit: July 20, 2011, 02:43:05 PM by Fatman
I was kicking around how to easily calculate the wieghts/pressures needed for a given mold size and desired psi.
So I made a couple of tools.

The first is for a Dutch lever press.
Download the attached files or
Copy the stuff between the lines into a notpad on your PC, then save as LeverFromage.hta
Once you've done that double click and the rest is self explanitory.

Let me know if you find any errors

(i have attached the complete files at the bottom)

Thanks
Code Select

<HTML>
<HEAD>
<TITLE>
Lever Fromage Du Fatman
</TITLE>
<SCRIPT LANGUAGE="vbscript">
OPTION EXPLICIT
Dim dblPrices(2)

dblPrices(0) = 12.56
dblPrices(1) = 28.26
dblPrices(2) = 50.24


Sub cmdCalc_OnClick
Dim intSelected, intSelected1, dblcyl0, dblcyl01
Dim dblTotal, dblcyl, dblcyl1, txtcyl
Dim dblTot, dblTot1, dblTot2, dblTot3


intSelected = frmForm1.cboProducts.SelectedIndex
dblTot = dblPrices(intSelected) * frmForm1.txtQty.Value
dblTot = dblTot
dblTot1 = dblTot * 2
dblTot2 = dblTot * 3
dblTot3 = dblTot * 4
dblcyl0 = CInt(frmForm1.txtwght.Value)
dblcyl01 = CInt(frmForm1.txtPiv.Value)
dblcyl = (dblcyl0   dblcyl01) / dblcyl01

dblcyl1 = dblPrices(intSelected)
frmForm1.txtTotal.Value = " " & dblTot
frmForm1.txtTotal1.Value = " " & dblTot1
frmForm1.txtTotal2.Value = " " & dblTot2
frmForm1.txtTotal3.Value = " " & dblTot3
frmForm1.txtTotal4.Value = " " & dblTot / dblcyl
frmForm1.txtTotal5.Value = " " & (dblTot / dblcyl) * 2
frmForm1.txtTotal6.Value = " " & (dblTot / dblcyl) * 3
frmForm1.txtTotal7.Value = " " & (dblTot / dblcyl) * 4
frmForm1.txtTotal8.Value = " " & dblTot / dblcyl
frmForm1.txtTotal9.Value = " " & dblcyl
End Sub


</SCRIPT>
</HEAD>
<BODY BGCOLOR="white">
<FONT FACE="arial" SIZE=2><B>
<CENTER>
<H3>Mold Pressure Calculator</H3>
<P>
Select the Mold Size you require from the list, then
simply enter the Desired internal mold psi,</P>
and click the Calculate
button to see the LBS of force needed.
</P>
<FORM NAME="frmForm1">
<SELECT NAME="cboProducts">
<OPTION>Mold Size 4"
<OPTION>Mold Size 6"
<OPTION>Mold Size 8"
</SELECT>
  Target PSI
<INPUT TYPE="text" NAME="txtQty" SIZE=10>
</P>
Please enter your Measurment from pivot to fulcrum in inches
<INPUT TYPE="text" NAME="txtPiv" SIZE=10 value="1">
</P>
Please enter your Measurment from fulcrum to wieght point in inches
<INPUT TYPE="text" NAME="txtwght" SIZE=10 value="1">
<P>
<INPUT TYPE="button" NAME="cmdCalc" VALUE="Calculate">
<P>
This is the force in pounds needed on your Side by side molds.
</P>
<INPUT TYPE="text" NAME="txtTotal">
Two Molds <INPUT TYPE="text" NAME="txtTotal1">
Three Molds <INPUT TYPE="text" NAME="txtTotal2">
Four Molds <INPUT TYPE="text" NAME="txtTotal3">
</P>

This is the Prdicted necesarry Wieghts in pounds needed on your Lever.
</P><INPUT TYPE="text" NAME="txtTotal4">
Two Molds   <INPUT TYPE="text" NAME="txtTotal5">
Three Molds <INPUT TYPE="text" NAME="txtTotal6">
Four Molds  <INPUT TYPE="text" NAME="txtTotal7">
</P>
</P>
Amount of simulated wieght. (used for proofing Multiply sim wieght By Advantage Factor)
</P><INPUT TYPE="text" NAME="txtTotal8"> Your Mech Adv Factor <INPUT TYPE="text" NAME="txtTotal9">
</FORM>
</BODY>
</HTML>



This second section is for a pnuematic press, same instructions as before except the name changes to fromage.hta

Code Select



<HTML>
<HEAD>
<TITLE>
Fromage Du Fatman
</TITLE>
<SCRIPT LANGUAGE="vbscript">
OPTION EXPLICIT
Dim dblPrices(2)

dblPrices(0) = 12.56
dblPrices(1) = 28.26
dblPrices(2) = 50.24

Sub cmdCalc_OnClick
Dim intSelected, intSelected1
Dim dblTotal, dblcyl, dblcyl1, txtcyl
Dim dblTot, dblTot1, dblTot2, dblTot3

intSelected = frmForm1.cboProducts.SelectedIndex
dblTot = dblPrices(intSelected) * frmForm1.txtQty.Value
dblTot = dblTot
dblTot1 = dblTot * 2
dblTot2 = dblTot * 3
dblTot3 = dblTot * 4
dblCyl = frmForm1.txtcyl.Value / 2
dblcyl1 = dblcyl * dblcyl * 3.14
frmForm1.txtTotal.Value = " " & dblTot
frmForm1.txtTotal1.Value = " " & dblTot1
frmForm1.txtTotal2.Value = " " & dblTot2
frmForm1.txtTotal3.Value = " " & dblTot3
frmForm1.txtTotal4.Value = " " & dblTot / dblcyl1
frmForm1.txtTotal5.Value = " " & dblTot1 / dblcyl1
frmForm1.txtTotal6.Value = " " & dblTot2 / dblcyl1
frmForm1.txtTotal7.Value = " " & dblTot3 / dblcyl1
End Sub


</SCRIPT>
</HEAD>
<BODY BGCOLOR="white">
<FONT FACE="arial" SIZE=2><B>
<CENTER>
<H3>Mold Pressure Calculator</H3>
<P>
Select the Mold Size you require from the list, then
simply enter the Desired internal mold psi,</P>
and click the Calculate
button to see the LBS of force needed.
</P>
<FORM NAME="frmForm1">
<SELECT NAME="cboProducts">
<OPTION>Mold Size 4"
<OPTION>Mold Size 6"
<OPTION>Mold Size 8"
</SELECT>
  Target PSI
<INPUT TYPE="text" NAME="txtQty" SIZE=10>
</P>
Please enter your Cylinder Size in inches
<INPUT TYPE="text" NAME="txtCyl" SIZE=10>
<P>
<INPUT TYPE="button" NAME="cmdCalc" VALUE="Calculate">
<P>
This is the force in pounds needed on your Side by side molds.
</P>
<INPUT TYPE="text" NAME="txtTotal">
Two Molds <INPUT TYPE="text" NAME="txtTotal1">
Three Molds <INPUT TYPE="text" NAME="txtTotal2">
Four Molds <INPUT TYPE="text" NAME="txtTotal3">
</P>

This is the Prdicted necesarry psi in your pnuematic cylinder.
</P><INPUT TYPE="text" NAME="txtTotal4">
Two Molds   <INPUT TYPE="text" NAME="txtTotal5">
Three Molds <INPUT TYPE="text" NAME="txtTotal6">
Four Molds  <INPUT TYPE="text" NAME="txtTotal7">
</FORM>
</BODY>
</HTML>

Gürkan Yeniçeri

#1
July 20, 2011, 05:32:19 AM
Line 29
dblcyl = (dblcyl0   dblcyl01) / dblcyl01
Is missing something

Second part Line 22
dblTot = dblTot   dblShipping
is missing something.

Probably copy paste converted signs to nothing. Was it a plus sign?

Fatman

#2
July 20, 2011, 11:15:10 AM Last Edit: July 20, 2011, 12:15:43 PM by Fatman
Quote from: Gürkan Yeniçeri on July 20, 2011, 05:32:19 AM
Line 29
dblcyl = (dblcyl0   dblcyl01) / dblcyl01
Is missing something

Second part Line 22
dblTot = dblTot   dblShipping
is missing something.

Probably copy paste converted signs to nothing. Was it a plus sign?

Your absolutely right it striped out a + sign.
It should read dblcyl = ( dblcyl0 + dblcyl1) / dbcyl
This is the lever arm measurement calc..

The second part the variable dblshipping can be deleted it crept in from something else I was doing.

I will edit the original post to fix these error good catch thanks..

p.s yep the forum software doesn't appreciate html code dumped directly into its posts, my bad.
The original post is fixed.

Attached are the complete files.
Thanks
Here is what they look like.

Tomer1

#3
July 20, 2011, 07:43:55 PM
How about a metric version? :P

Fatman

#4
July 20, 2011, 11:20:19 PM
I'm not familiar with common metric size molds.
If you want to post say the five most common sizes I can see how hard it would be to convert.

Also is the pressures expressed in psi or kpa?

darius

#5
July 21, 2011, 03:20:38 PM
How about a format that can work on a Mac?

Fatman

#6
July 21, 2011, 09:20:07 PM
Sorry I don't have access to a Mac, so I have no way to program for it.
Though most of the code is HTML, so likely someone with Javascript knowledge could convert it to run on Mac/Linux etc...

darius

#7
July 21, 2011, 10:03:12 PM
Well, thanks anyway.  :)

Fatman

#8
July 27, 2011, 04:33:28 PM
Your welcome, I'm playing with an update that does any mold size inches or metric.
as well as psi or metric pressures and weights..
Probably a week or two though for that to be finished.

Gürkan Yeniçeri

#9
July 27, 2011, 10:15:15 PM
Fatman, you only have one more miracle left for the saintsip...

Thanks for these tools.

As they are html pages, may be John can include them somewhere on the cheeseforum.org and after that it will work on any OS anywhere.

Fatman

#10
July 28, 2011, 03:36:08 AM
He is certainly welcome to do so. The other tool on the back burner is a two mold size stack configuration..
I.e. A 4" on top of a 6" or 8" mold what would the respective pressures be.

I thought of this as I bet it's common for folks to make a cheese and have enough curds for a puck.
So what finagling would it take to pull off a successful double header of non equal sizes..

I know how just need the time to write it.

Fatman

#11
July 29, 2011, 02:10:33 AM Last Edit: July 29, 2011, 04:14:09 AM by Fatman
As you can see I'm still playing but this shows how you can mix and match metric and English values.
I did this as we Americans buy E.U. molds and need to be able to figure them out.
And our European cousins just might buy air cylinders or American made presses with English gauges.

Click the links below to download. (Sorry only works on PC's)

And please, let me know if there are errors.

Thanks

Fatman

Tomer1

#12
July 29, 2011, 12:32:46 PM
Metric pressure calculation is off   :P

Fatman

#13
July 29, 2011, 12:48:39 PM Last Edit: January 30, 2012, 11:28:42 PM by Fatman
Can you elaborate?
I used the canned formula so when you say it's off what do you mean?
Too high, too low, wrong expression?
Are you referring to as an example at 4psi it comes to 27.4Kpa rather than 27.5Kpa?
That is due to rounding I limited it to two decimal places to keep the numbers shorter.
But if that degree of accuracy is needed I can bump it up.
I figured +or- .1% was close enough.

My problem is not being educated in a metric system I don't know what's expected.
http://www.asknumbers.com/psi-to-kilopascal.aspxThis is where I got the numbers.

Also I'm working on a web based version so I can use it on my iPad/android or macs.
The problem is the buttons don't work the same in all browsers..

www.netnut.us/fromage for the pneumatic one.
and www.netnut.us/leverfromagefor the lever based one.

Fatman

#14
July 29, 2011, 03:06:27 PM
By extending the pi constant out to approx eight decimal places.
I can get it to within .003 of the exact Kpa, but then that requires a similar accuracy of input.
nobody I know will for instance put 102.3mm they will simply put 102mm
And if the recipe calls for 50lbs in a four inch mold that's not quite 4psi, but nobody will put "place 50.25lbs" on your cheese.

I think the old addages "close enough for government work" or "close enough for horse shoe's and hand grenades"
Comes to mind.
I will keep looking at it, but don't see a profound reason to chase it with these fractions that equate to grams, when kilo's are called for.
I'm not even sure any pressure regulators are accurate enough for it to matter.
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