Unit and graph

[Lilli]

Hello,

I look for change unit of X-Y Plot.

q := 0°,1°.. 360°

R := 24 mm

L := 128 mm

d(q) := R*cos(q)-L*cos(q)

when I draw d(q) by a X-Y plot the units are in rad for q and m for d(q).

Is it possible to draw a graph with a specific units ?

[nas0k · Accepted solution]

One possible solution, please see the attached.

I hope this helps.

Norm

[Lilli]

How did you do?

I must copy your graph in my sheet to obtain the good result.

Could you help me.

[MikeArmstrong]

Simple explanation in the attached.

As I have already indicated, you just divide the variable by the required unit, using the / key.

Mike

[MikeArmstrong]

As Norm has indicated in his example you just divide variable by the desired unit.

Mike

[Lilli]

I'm really afraid but I understand you explaination but don't know apply!

[MikeArmstrong]

Have a look below.

Move the cursor to this position on the graph and then strike the / key and type the unit in. It should then look like this.

Another note. I had to change the limits of your graph to get it to work, watch out for that.

Mike

[Lilli]

Perfect Mike!

Many thanks

[MikeArmstrong]

No problem at all.

Mike

[Lilli]

I have another question.

Is it possible to find d(q) min and d(q) max?

I have the answer but not with MathCad

d(q) min = 96.2 mm for q = 180°

d(q) max = 177.8 mm for q = 0° or 360°

Is-it possible to have the response by MathCad?

[MikeArmstrong]

Have a look at the attached sheet. Description included.

Mike

[Lilli]

Okay for the vector but you haven't the angle of min and max d value.

[MikeArmstrong]

Okay for the vector but you haven't the angle of min and max d value.

Sorry I didn't read your post correctly, see attached.

Mike

[Fred_Kohlhepp]

try this:

[MikeArmstrong]

Superb work Fred, lovely example.

Mike

[Lilli]

I didn't have this collapsed area, I continu with your docuent, it's possible?

IYou write that you use a program because there might be multiple results, if it wasn't the case what will be the solution?

[MikeArmstrong]

Please see the attached. The collapsed Area is at the top of my sheet.

I have included the option for returning only single solutions.

Mike

[Lilli]

How do you know all this thing? I'm French and I search a training or book to learn to use MathCad but specificly the mechanical calcul.

Do you know this type of book?

[MikeArmstrong]

A lot of Mathcad users have taught themselves through experience and searching through the forum. How long have you been using Mathcad?

Mike

[VladimirN]

Olivier HERBIET wrote:

...I search a training or book to learn to use MathCad but specificly the mechanical calcul.

Do you know this type of book?

Hello!

1. I recommend reading the book by Brent Maxfield "Engineering with Mathcad".

2. On site "LearningExchange" you can find training videos for versions Mathcad 14/15 and Mathcad Prime 1.0: http://learningexchange.ptc.com/tutorials/by_product/product_id:4 . On PTC's site in section "Demos & Tech Tips": http://www.ptc.com/products/tutorials/mathcad.htm . And also some videos are available for viewing on the channel "PTCstudio" on YouTube site: http://www.youtube.com/playlist?list=PLF56308229AA2E115&feature=plcp

[Lilli]

2 days without training.

[MikeArmstrong]

Keep getting involved in the forum, wataching and reading and also keep asking questions. You'll pick it up soon enough

Mike

[Lilli]

Many thanks Mike and Fred