Date: 27/03/2014 15:06:07
From: JTQ
ID: 509655
Subject: Maths Q

Is there some way I can find the width of the orange bar using only the data shown?

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Date: 27/03/2014 15:10:41
From: Bubblecar
ID: 509657
Subject: re: Maths Q

JTQ said:


Is there some way I can find the width of the orange bar using only the data shown?

Open the image in Photoshop and set the scale so that the units quoted are true in mm. Then measure the width of the orange bar with the selection tool.

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Date: 27/03/2014 15:12:29
From: sibeen
ID: 509661
Subject: re: Maths Q

No.

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Date: 27/03/2014 15:13:53
From: Boris
ID: 509662
Subject: re: Maths Q

i agree with sibeen.

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Date: 27/03/2014 15:15:40
From: The Rev Dodgson
ID: 509663
Subject: re: Maths Q

I agree with bubblecar

(or scale it straight off the screen and do a simple ratio)

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Date: 27/03/2014 15:16:20
From: stumpy_seahorse
ID: 509665
Subject: re: Maths Q

Boris said:


i agree with sibeen.

at a guess, i’d say about 9

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Date: 27/03/2014 15:16:43
From: Boris
ID: 509666
Subject: re: Maths Q

that assumes the drawing is accurate.

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Date: 27/03/2014 15:18:06
From: Boris
ID: 509668
Subject: re: Maths Q

i’d say it “looks” to be about half the 32 measure…so 15.

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Date: 27/03/2014 15:19:15
From: Bubblecar
ID: 509669
Subject: re: Maths Q

Just did it in Photoshop (but not to a high degree of accuracy, given the low res inage). The orange bar is approximately 19 wide.

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Date: 27/03/2014 15:19:53
From: JTQ
ID: 509671
Subject: re: Maths Q

Alrighty, thanks

I’ve been given a catalogue of drawers at work that I need to set up in a software program, but the intelligent people that wrote the catalogue missed a hell of a lot of information in it.

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Date: 27/03/2014 15:20:14
From: stumpy_seahorse
ID: 509672
Subject: re: Maths Q

Boris said:


i’d say it “looks” to be about half the 32 measure…so 15.

i got (107-72)/4

(+/- 1)

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Date: 27/03/2014 15:20:21
From: The Rev Dodgson
ID: 509673
Subject: re: Maths Q

Boris said:


i’d say it “looks” to be about half the 32 measure…so 15.

Assuming symmetry, leftmost vertical line to right hand side of orange is 36, and it looks a little over half of that, so I’d say 20.

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Date: 27/03/2014 15:20:37
From: sibeen
ID: 509674
Subject: re: Maths Q

JTQ said:


Alrighty, thanks

I’ve been given a catalogue of drawers at work that I need to set up in a software program, but the intelligent people that wrote the catalogue missed a hell of a lot of information in it.

Did they give you an autocad file?

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Date: 27/03/2014 15:22:34
From: party_pants
ID: 509677
Subject: re: Maths Q

I think you just use whatever width timber you see fit as matches the rest of your cabinet.

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Date: 27/03/2014 15:22:59
From: JTQ
ID: 509678
Subject: re: Maths Q

sibeen said:


Did they give you an autocad file?

Nah, just a bunch of PDFs and hard copy.

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Date: 27/03/2014 15:23:20
From: Boris
ID: 509679
Subject: re: Maths Q

and knowing nominal sizes would narrow down the range and assume material to be mdf melamine, so probably 18.

maybe.

;-)

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Date: 27/03/2014 15:23:33
From: party_pants
ID: 509680
Subject: re: Maths Q

19 mm is the standard for thickness for dressed pine.

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Date: 27/03/2014 15:23:41
From: JTQ
ID: 509681
Subject: re: Maths Q

party_pants said:


I think you just use whatever width timber you see fit as matches the rest of your cabinet.

Could do, but the timber sits at the left of the orange bar. The orange bar is the width between the timber and the screw holes.

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Date: 27/03/2014 15:31:46
From: Speedy
ID: 509685
Subject: re: Maths Q

Bubblecar said:


Just did it in Photoshop (but not to a high degree of accuracy, given the low res inage). The orange bar is approximately 19 wide.

Yep.

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Date: 27/03/2014 15:33:38
From: PermeateFree
ID: 509686
Subject: re: Maths Q

JTQ said:


Alrighty, thanks

I’ve been given a catalogue of drawers at work that I need to set up in a software program, but the intelligent people that wrote the catalogue missed a hell of a lot of information in it.

It would probably be obvious if you had the unit in front of you, as they are quite specific as to what the perimeters line up with.

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Date: 27/03/2014 15:34:35
From: JTQ
ID: 509687
Subject: re: Maths Q

PermeateFree said:


It would probably be obvious if you had the unit in front of you, as they are quite specific as to what the perimeters line up with.

Actually having it in front of me would be perfect, as I could just grab a ruler and measure it with that, and check their dumb catalogue in the bin.

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Date: 27/03/2014 15:40:13
From: PermeateFree
ID: 509692
Subject: re: Maths Q

JTQ said:


PermeateFree said:

It would probably be obvious if you had the unit in front of you, as they are quite specific as to what the perimeters line up with.

Actually having it in front of me would be perfect, as I could just grab a ruler and measure it with that, and check their dumb catalogue in the bin.

In that situation the only solution is to try several scales on common scale-rules to find which one they have used, then scale it off. Due to the simplicity of the drawing those drawn should be quite accurate.

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Date: 27/03/2014 22:07:19
From: gaghalfrunt
ID: 509957
Subject: re: Maths Q

I reckon its more yellow than orange.

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Date: 27/03/2014 22:37:33
From: SCIENCE
ID: 509993
Subject: re: Maths Q

20

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Date: 28/03/2014 01:18:59
From: stan101
ID: 510125
Subject: re: Maths Q

If it is laminate cabinetry it will be 16 or 19mm. Find the material type and you find your answer. Or like others have said scale by ratio or a software application. If you have access to cad you can import a jpeg then se t scale off that and measure away..

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Date: 28/03/2014 01:57:17
From: Stealth
ID: 510135
Subject: re: Maths Q

72/4, except that the far quarter may be slightly smaller than the other 3 quarters.

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Date: 28/03/2014 09:13:52
From: JTQ
ID: 510153
Subject: re: Maths Q

stan101 said:


If it is laminate cabinetry it will be 16 or 19mm. Find the material type and you find your answer. Or like others have said scale by ratio or a software application. If you have access to cad you can import a jpeg then se t scale off that and measure away..

16mm or 18mm is used in laminate cabinetry. But this isn’t a laminate board I’m trying to measure, it’s the gap between the laminate board and the drawer runner.

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Date: 28/03/2014 09:16:11
From: JTQ
ID: 510154
Subject: re: Maths Q

JTQ said:


16mm or 18mm is used in laminate cabinetry. But this isn’t a laminate board I’m trying to measure, it’s the gap between the laminate board and the drawer runner.

Correction… laminate board and the screw holes.

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Date: 28/03/2014 09:20:51
From: roughbarked
ID: 510155
Subject: re: Maths Q

JTQ said:


JTQ said:

16mm or 18mm is used in laminate cabinetry. But this isn’t a laminate board I’m trying to measure, it’s the gap between the laminate board and the drawer runner.

Correction… laminate board and the screw holes.

Measure the screw lengths. Make the board the next standard size up.

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Date: 28/03/2014 09:25:28
From: furious
ID: 510156
Subject: re: Maths Q

You have to make some assumptions but it looks to me that the measurement is 72/4 = 18

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Date: 28/03/2014 09:35:59
From: Speedy
ID: 510160
Subject: re: Maths Q

furious said:


You have to make some assumptions but it looks to me that the measurement is 72/4 = 18

Could be, but if you look more closely, the orange bar is wider than the space beside it.

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Date: 28/03/2014 09:38:44
From: roughbarked
ID: 510162
Subject: re: Maths Q

Speedy said:


furious said:

You have to make some assumptions but it looks to me that the measurement is 72/4 = 18

Could be, but if you look more closely, the orange bar is wider than the space beside it.

scale may not be exact.

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Date: 28/03/2014 09:41:52
From: Speedy
ID: 510163
Subject: re: Maths Q

roughbarked said:


Speedy said:

furious said:

You have to make some assumptions but it looks to me that the measurement is 72/4 = 18

Could be, but if you look more closely, the orange bar is wider than the space beside it.

scale may not be exact.

It may not be. We can assume that it isn’t and use random numbers, or assume that it is to scale.

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Date: 28/03/2014 09:44:48
From: The Rev Dodgson
ID: 510165
Subject: re: Maths Q

Precise scaling finds the distance to be 18.94736842, or as we engineers like to call it, 20,

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Date: 28/03/2014 09:46:11
From: roughbarked
ID: 510166
Subject: re: Maths Q

The Rev Dodgson said:


Precise scaling finds the distance to be 18.94736842, or as we engineers like to call it, 20,

or, FN.

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Date: 28/03/2014 09:47:27
From: furious
ID: 510167
Subject: re: Maths Q

Hence my reference to assumptions…

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Date: 28/03/2014 09:49:46
From: furious
ID: 510168
Subject: re: Maths Q

It does, but I think it might be an optical illusion caused by the colouring. My high tech method of placing a measuring device on the screen has them at roughly the same width…

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Date: 28/03/2014 09:51:52
From: Speedy
ID: 510169
Subject: re: Maths Q

furious said:

  • if you look more closely, the orange bar is wider than the space beside it

It does, but I think it might be an optical illusion caused by the colouring. My high tech method of placing a measuring device on the screen has them at roughly the same width…

:) It’s not an optical illusion.

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Date: 28/03/2014 09:52:13
From: sibeen
ID: 510170
Subject: re: Maths Q

The Rev Dodgson said:


Precise scaling finds the distance to be 18.94736842, or as we engineers like to call it, 20,

:)

…and I’m finding that funny at the moment because I just realised I made a big OoM error in something I was discussing yesterday. My business partner has just spent the last 5 minutes laughing at me.

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Date: 28/03/2014 09:52:46
From: The Rev Dodgson
ID: 510171
Subject: re: Maths Q

furious said:

  • if you look more closely, the orange bar is wider than the space beside it

It does, but I think it might be an optical illusion caused by the colouring. My high tech method of placing a measuring device on the screen has them at roughly the same width…

I used the same technology to arrive at my number.

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Date: 28/03/2014 09:52:51
From: The Rev Dodgson
ID: 510172
Subject: re: Maths Q

furious said:

  • if you look more closely, the orange bar is wider than the space beside it

It does, but I think it might be an optical illusion caused by the colouring. My high tech method of placing a measuring device on the screen has them at roughly the same width…

I used the same technology to arrive at my number.

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Date: 28/03/2014 09:53:54
From: Speedy
ID: 510173
Subject: re: Maths Q

The Rev Dodgson said:


furious said:
  • if you look more closely, the orange bar is wider than the space beside it

It does, but I think it might be an optical illusion caused by the colouring. My high tech method of placing a measuring device on the screen has them at roughly the same width…

I used the same technology to arrive at my number.

Me too. Look more closely furious :)

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Date: 28/03/2014 09:54:59
From: sibeen
ID: 510174
Subject: re: Maths Q

I see that The Rev is of the ‘measure twice’ school of thought.

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Date: 28/03/2014 09:55:32
From: The Rev Dodgson
ID: 510175
Subject: re: Maths Q

sibeen said:


The Rev Dodgson said:

Precise scaling finds the distance to be 18.94736842, or as we engineers like to call it, 20,

:)

…and I’m finding that funny at the moment because I just realised I made a big OoM error in something I was discussing yesterday. My business partner has just spent the last 5 minutes laughing at me.

Last Friday I spent the day listening to an old codger tell us why it had been all down hill since slide rules were replaced by calculators, and people didn’t need to do OoM calcs in their head any more. :)

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Date: 28/03/2014 10:00:42
From: The Rev Dodgson
ID: 510176
Subject: re: Maths Q

sibeen said:


I see that The Rev is of the ‘measure twice’ school of thought.

And measuring a third time, I find the gap on the right is bigger than the gap on the left, so I should really revise my estimate to 18.

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Date: 28/03/2014 10:25:04
From: Boris
ID: 510177
Subject: re: Maths Q

glad to see everyone is slowly coming around to agreement with my 18.

;-)

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Date: 29/03/2014 19:37:40
From: rumpole
ID: 510930
Subject: re: Maths Q

A simple scale off the screen gives 20. but I’m no engineer

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Date: 16/06/2023 10:06:07
From: JTQ
ID: 2043938
Subject: re: Maths Q

Morning all .. curious if anyone currently around is any good at maths .. I’ve got a shape and need to figure out a parametric formula for the curve.

Using the image below…

I need to find how to calculate the distance for both #1 and #2, as two separate formulas.

Would anyone know how to, or be able to suggest what to search for on Google for this? I’m not even sure what the search term would be…

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Date: 16/06/2023 10:11:14
From: The Rev Dodgson
ID: 2043941
Subject: re: Maths Q

JTQ said:


Morning all .. curious if anyone currently around is any good at maths .. I’ve got a shape and need to figure out a parametric formula for the curve.

Using the image below…

I need to find how to calculate the distance for both #1 and #2, as two separate formulas.

Would anyone know how to, or be able to suggest what to search for on Google for this? I’m not even sure what the search term would be…

What sort of curve is it? Circle, parabola, something else?

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Date: 16/06/2023 10:14:18
From: JTQ
ID: 2043943
Subject: re: Maths Q

The Rev Dodgson said:


What sort of curve is it? Circle, parabola, something else?

Just an arc. At the moment the red box is 900×200, green is 700 wide, and an arc with radius of 700.

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Date: 16/06/2023 10:25:21
From: JTQ
ID: 2043945
Subject: re: Maths Q

Actually I think I may have it sorted, using circular segment :)

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Date: 16/06/2023 10:26:42
From: The Rev Dodgson
ID: 2043946
Subject: re: Maths Q

JTQ said:


The Rev Dodgson said:

What sort of curve is it? Circle, parabola, something else?

Just an arc. At the moment the red box is 900×200, green is 700 wide, and an arc with radius of 700.

That doesn’t give enough information to define the position of the red box relative to the arc centre.

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Date: 16/06/2023 11:09:18
From: dv
ID: 2043956
Subject: re: Maths Q

Need a bit more info, JtQ. E.g. you could give us the minimum value of A1 or the maximum value of A2?

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