Help with drawing

[UCAssistantCAD]

Hey guys, so I am new to AutoCad and am willingly attempting to learn it by myself!

 

A little insider, I work as an assistant in a tech drawing class at NYU. The catch is everyone in the class is working on AutoCad which I have little to no experience in. The job doesn't require me to know this...but, I might aswell for the future!

 

I've been working on one of these design's off a book and was wondering if anyone could guide me through a few thing's, I do know a few basic commands like trim, line, circle, array etc..

 

Here is the drawing I am trying to duplicate.

 

Here is what I came up with on the Geneva cam.

 

 

^ Above I circled what I am having a problem with. I came seem to get the notch part correct. It say's that the notch is 6.50 x 3.25 and assuming that is L x W that's what I come up with using the line command. I don't how to close it properly with the circle and also it looks a little funky, what am I doing wrong?

Edited October 2, 2012 by UCAssistantCAD

[Tiger]

First, how to add images to your post (without using links that make your posts get moderated...)

 

Second, hi

 

third, your problem.

 

Try the command REGEN first, that updates your display.

 

I see two ways to solve your issue, and what is the right one depends on how the assignment looks. Either you use MOVE and move the notch so that it intersects with your circle. Make sure that you have OSNAP (particulary ENDpoint and APParent intersection) on. Snap to the Endpoint of the notch when you are asked for Basepoint and then slowly move your cursor downwards toward the circle and you should see the Apparent Intersection OSnap.

 

The other way is to use the EXTEND command and extend the lines to the circle. This makes the lines slightly longer though, so like I said, depending on what the assigment says (what is actually measured), this might be wrong.

[UCAssistantCAD]

Hmm well I accidentally added edited in a picture like the first time before I read your comment so it went back to being moderated I guess. I still can't seem to do it. THe apparent intersection osnap doesn't come up :/ I would use extend but this has to be the actual size. 6.50 x 3.25

[Tiger]

I'll try and explain a bit more,

 

Start the command Move.

you will see the prompt Select objects: at the commandline. Highlight your notch and hit enter

At the prompt Specify base point: select the end-point of the notch. If you don't see the OSNAP type END and hit enter and it should come up.

At the prompt Specify second point: type APP and hit enter. Now select the line of your notch and then mouse over the circle and the Appenrent Intersection osnap should come up, when it does, just click and it should snap to the correct place.

[ReMark]

Your drawing doesn't agree with the posted image. The notch you created is tall and narrow while the notch in the diagram is short and wide.

 

See post #12 of this thread.

 

http://www.cadtutor.net/forum/showthread.php?73013-First-one-to-draw-these-up.../page2

Edited October 2, 2012 by ReMark

[CyberAngel]

Here's a simple way to make your notch. Use the Offset command, give it a distance of 3.25, select the central axis, offset it left, select it again, offset it right. That gives you the sides.

 

Draw a horizontal line from the intersection of an offset line (either one) with the circle to the same point on the other line. This is a temporary line. Offset it 3.25 to the top side. That gives you the top. Erase the temporary line.

 

You can use Trim or Fillet (radius zero) to finish off the sides of the notch.

[UCAssistantCAD]

Thank's SO much guys. Now I am not sure how to make the curves or archs...

 

This is where am I at:

http://i49.tinypic.com/21nqo8y.png

 

Also tiger, I am not getting the option to add pictures from computer when I click insert image:

[UCAssistantCAD]

Hey tiger, it wont let me insert an image straight from my desktop. Only give's me the option to insert an image by a URL. Anyways, so thank you so much guy's I got the notch part down! Now can someone help me with the curve's and archs? Im not sure how to do that...picture's would help TONS! Thank you!!

[ReMark]

You have the information you need right in the drawing except that the "73" should be a radius and not a diameter. The other two pieces of information you need about both radii as well: 92 and 32.

[UCAssistantCAD]

Yes I figured that out..just a error in the book. How can I make that U shape? I am confused on that part..

[ReMark]

A trimmed circle?

[CyberAngel]

Yes I figured that out..just a error in the book. How can I make that U shape? I am confused on that part..

 

There are usually several ways to accomplish a task. You could draw circles and trim them. You could draw an arc and rotate copies of it. You could make a polar array. That's just off the top of my head. It depends on the commands you're most comfortable with and the parameters you have.

[UCAssistantCAD]

A trimmed circle?

 

Yes thanks! I'm still not sure of how to do that last bit though! The radi of 92 and 32. What is a simple way of making that arch?

[ReMark]

Draw a line 92 units long at a 15 degree angle. Create a circle with a radius of 32 using the endpoint of the line you just created.

[UCAssistantCAD]

Thank you ReMark! I finally completed the whole design. Autocad is so much fun when you start completing things hahaha. Anyways now onto dimensioning, when you dimension how can you make the text big enough to show when you plot it?

[ReMark]

You have two or three different ways to do it.

 

Are you going to make use of a paper space layout and viewport?

 

What do you know about annotative scaling?

 

Have you looked at the various dimension style settings? Re: DDIM or DIMSTYLE commands. http://www.autocadguru.com/text/Common/txtddim.htm

 

Post an image of what you have accomplished so far.

Edited October 2, 2012 by ReMark

[Tiger]

Hey tiger, it wont let me insert an image straight from my desktop. Only give's me the option to insert an image by a URL. Anyways, so thank you so much guy's I got the notch part down! Now can someone help me with the curve's and archs? Im not sure how to do that...picture's would help TONS! Thank you!!

 

 

It's a weird thing where FF lets you inser image from your desktop that way, but Chrome doesn't.

 

With Chrome you can add the image as an attachment though. A bit further down than what your image show you can click a button labled Manage Attachment - there you can add your image.

[iainlines]

Quickest and easiest way for starters.....hit D then enter, this will bring up the dimension style box. Have a play around with the different settings for text height, arrow size, precision etc etc

EDIT: ReMark's link is somewhat more thorough than my suggestion and he'll give you a better undrstanding. I'm just trying to get you going.

[UCAssistantCAD]

It's a weird thing where FF lets you inser image from your desktop that way, but Chrome doesn't.

 

With Chrome you can add the image as an attachment though. A bit further down than what your image show you can click a button labled Manage Attachment - there you can add your image.

 

Yes it's alright Ill just use internet explorer when using this site

 

You have two or three different ways to do it.

 

Are you going to make use of a paper space layout and viewport?

 

What do you know about annotative scaling?

 

Have you looked at the various dimension style settings? Re: DDIM or DIMSTYLE commands. http://www.autocadguru.com/text/Common/txtddim.htm

 

Post an image of what you have accomplished so far.

 

I would if I knew how to, I really want to learn how to add the title block after these dimension's are completed. I dont know much about it but its for changing scale's so that the picture is properly visible right? Like the dimension/text style control. I just briefly went over the link you posted that looks like it will help alot thanks. I also posted the picture of where I currently am.

[ReMark]

Back before the introduction of paper space everything was done in model space (geometry, text, dimensions and title block/border). Now it is almost expected the user will use a paper space layout for their title block/border however you still have two choices when it comes to text (notes and callouts) and dimensions. If you want these entities to be included in model space then it would be a good idea to become acquainted with a feature called Annotative Scaling. Text and dimensions are assigned scales based upon the viewport scales one anticipates using in the layout. There are a handful of system variables that one should also become familiar with as well as a feature called the Scalelist that will play an important part in all of this. Or, you could elect to place both your text and dimensions in your layout at a 1:1 scale. A handful of us here at CADTutor, including myself, happen to use this method. One important aspect of using this method when it comes to dimensioning is to make sure all dimensions are Associative which is not the same as annotative.

 

In regards to using viewports in a paper space layout there are some things you should know, the bulk of which are covered in this thread I recently created.

 

http://www.cadtutor.net/forum/showthread.php?72972-Things-you-should-know-about-Viewports.&highlight=Viewports