Dear guys,

I want to an anotation line with 2 arrows as described in picture.

May anyone help me, thank you

Categories: Drawings and Detailing

Last comment By: Rick Becker   Mon, 23 Apr 2018 11:21:47 GMT
Re: How to create an anotation line with 2 arrows

Holding down the ctr key while using the command you can add more than one arrow

By: Christian Chu  Sun, 15 Apr 2018 07:05:18 GMT
Re: How to create an anotation line with 2 arrows

I still can't do exactly what is described in picture, when I hold down ctrl , it just create another coppy of line, not line with 2 arrow and 2 text

By: Tran Van Quang  Sun, 15 Apr 2018 07:17:39 GMT
Re: How to create an anotation line with 2 arrows

mark the annotation

Holding down the ctr key

drag n drop the green point at the arrow

By: Andreas Westphal  Sun, 15 Apr 2018 09:44:39 GMT
Re: How to create an anotation line with 2 arrows

You can use the "Multi-jog leader" (insert annotations). Click starting point, move curser to where you want to end it and double click to stop the command.

Edit:... I see that you are using 2008.. So I'm only assuming that the multi-jog leader command is available to you.

By: Dennis Bacon  Sun, 15 Apr 2018 09:54:14 GMT
Re: How to create an anotation line with 2 arrows

The circled arrows in your image are from a symbol not a leader.

More Symbols > Geometric tolerancing. Select the "Between" symbol:

By: Logan Pegler  Mon, 16 Apr 2018 00:51:20 GMT
Re: How to create an anotation line with 2 arrows

Thank @Logan Pegler, do you know the meaning of that line and P1, P2, P3, P4 in my drawing?

By: Tran Van Quang  Mon, 16 Apr 2018 12:04:35 GMT
Re: How to create an anotation line with 2 arrows

Tran Van Quang wrote:

...do you know the meaning of that line and P1, P2, P3, P4 in my drawing?

Those mark locations on the part. The PROFILE OF A  SURFACE applies between points P1 & P4

By: Rick Becker  Mon, 16 Apr 2018 15:08:22 GMT
Re: How to create an anotation line with 2 arrows

But there are 4 point P1,P2,P3, P4. Why are only P1 and P4 indicated?

By: Tran Van Quang  Mon, 16 Apr 2018 16:01:02 GMT
Re: How to create an anotation line with 2 arrows

Tran Van Quang wrote:

But there are 4 point P1,P2,P3, P4. Why are only P1 and P4 indicated?

Tran, your picture is only a small [portion of the part drawing...

In that small picture I see P3 is also defined.

I assume there are other geometric dimensions that reference all 4 points and that P2 is defined somewhere.

If not, then the drawing is over defined by virtue of P3 and P3 can be safely ignored.

Tran, you really need to get a fundamental understanding of Geometric Dimentioning and Tolerancing before proceeding very much further. There are some great links above. Study them and find a human that understands GD&T and ask them in person to explain a bit further. It is very hard to teach GD&T from a keyboard.

By: Rick Becker  Mon, 16 Apr 2018 17:26:25 GMT
Re: How to create an anotation line with 2 arrows

One thing which doesn't make sense to me that it's a "profile of surface", why it's ref. to points?

please see below image for ref - the top surface of the part is 0.2 to datum A and B

By: Christian Chu  Mon, 16 Apr 2018 17:36:11 GMT
Re: How to create an anotation line with 2 arrows

Not sure what standard this dwg was used for but seems to me that from P1 to P4

However, this is a profile of surface GDT, so it should ref. to surface, not poitns, see my other response

Here a shot from my GDT book

By: Christian Chu  Mon, 16 Apr 2018 17:39:54 GMT
Re: How to create an anotation line with 2 arrows

Sorry, I misunderstood your original message, I believe the double-arrow between P1 and P2 was inserted from a block

By: Christian Chu  Mon, 16 Apr 2018 17:50:49 GMT
Re: How to create an anotation line with 2 arrows

Christian, his was a correct callout based on ASME Y14.5M as long as the location of the points is defined by either basic dimensions or geometry.  The points are referencing a specific area that is to be controlled.

Although it is also acceptable to use the double arrow symbol as he is doing.

By: Dan Pihlaja  Mon, 16 Apr 2018 17:58:25 GMT
Re: How to create an anotation line with 2 arrows

The tangent of 2 arcs is commonly used as a defined point.

It usually isn't critical to get the points defined to a perfectly defined level. The intent is to apply the PROFILE OF A SURFACE to a region of the part.

It's not in the ASME standard, but a modicum of common sense is required.

By: Rick Becker  Mon, 16 Apr 2018 18:13:45 GMT
Re: How to create an anotation line with 2 arrows

Dan,

Agreed  if you can define 2 pointed as showing in your image

However, his is more like round shape and how to determine from 2 points as the below image

and here is how I clearly selected the surfaces

By: Christian Chu  Mon, 16 Apr 2018 18:11:55 GMT
Re: How to create an anotation line with 2 arrows

1-AG4JLT wrote:

The tangent of 2 arcs is commonly used as a defined point.

It usually isn't critical to get the points defined to a perfectly defined level. The intent is to apply the PROFILE OF A SURFACE to a region of the part.

It's not in the ASME standard, but a modicum of common sense is required.

Agreed, Rick

it's just a note !!!

I think I'd better stop making assumption until I can see  the whole dwg

By: Christian Chu  Mon, 16 Apr 2018 18:17:36 GMT
Re: How to create an anotation line with 2 arrows

I have seen both of these ways before:

By: Dan Pihlaja  Mon, 16 Apr 2018 18:45:17 GMT
Re: How to create an anotation line with 2 arrows

PROFILE OF A SURFACE or PROFILE OF A LINE is defined via BASIC dimensions.

The BASIC dimensions defines "perfect profile" of a shape.

A computer (a CMM) is generally used to take points of an actual part and the software compares the actual shape to the "perfect profile" shape with a band around the "perfect profile".

The band can be unilaterally placed or offset  favoring one side or the other.

The shape you show can be easily check in a CMM with Renishaw probe or a laser probe. However, you don't show the BASIC dimensions that will define the "perfect profile"

By: Rick Becker  Mon, 16 Apr 2018 19:49:10 GMT
Re: How to create an anotation line with 2 arrows

Dan,

the top view clearly shows the geometry of the part.

Please see the below image - without the top view, how to define  2 points from the front view?

Again, it's not right/wrong here. It's just to make sure it's totally clear to those who read the dwg and make/inspect the part

By: Christian Chu  Mon, 16 Apr 2018 19:41:21 GMT
Re: How to create an anotation line with 2 arrows

Here's a example of a part we make with several profile call-outs...

Notice that all of the geometry governed by profile call-outs are BASIC.

Here's another example (from real world parts)...

Here's one that is specified unilaterally...

By: Rick Becker  Mon, 16 Apr 2018 19:53:28 GMT
Re: How to create an anotation line with 2 arrows

Thanks, Rick

By: Christian Chu  Mon, 16 Apr 2018 20:14:02 GMT
Re: How to create an anotation line with 2 arrows

Which device do you use to check your profile tolerance in real as well as other tolerance. May you tell me your experience to choose value for profile tolerance too.

By: Tran Van Quang  Tue, 17 Apr 2018 10:56:58 GMT
Re: How to create an anotation line with 2 arrows

Tran Van Quang wrote:

Which device do you use to check your profile tolerance in real as well as other tolerance...

By: Rick Becker  Tue, 17 Apr 2018 11:31:52 GMT
Re: How to create an anotation line with 2 arrows

we use optical equipment to capture the object and compare it with the actual 3D model (SW) for the first article report. The tolerance can be varied depend on the features - For housing (industrial Design), the tolerance can open up to  .2. however, it's more tighter for fitting

By: Christian Chu  Tue, 17 Apr 2018 14:45:12 GMT
Re: How to create an anotation line with 2 arrows

Christian Chu wrote:

we use optical equipment to capture the object and compare it with the actual 3D model (SW) for the first article report.

Problem is, optical can only get you PROFILE OF A LINE

To do PROFILE OF A SURFACE you will need a Renishaw probe or similar.

By: Rick Becker  Tue, 17 Apr 2018 15:59:34 GMT
Re: How to create an anotation line with 2 arrows

We have similar equipment (make by S-T) as shown in your image and, yes, to check the surface profile for fitting - we don't have any vision system and depend much on our vendors as they have state of the art CMM equipments

By: Christian Chu  Tue, 17 Apr 2018 17:13:24 GMT
Re: How to create an anotation line with 2 arrows

Do you apply the datum reference in your drawing when you checking the profile tolerance with that machine

By: Tran Van Quang  Sun, 22 Apr 2018 10:05:13 GMT
Re: How to create an anotation line with 2 arrows

Tran Van Quang wrote:

Do you apply the datum reference in your drawing when you checking the profile tolerance with that machine

Yes. The software package that accompanies the CMM does the heavy lifting. Operator will create a "program" for each part he will inspect. He tells the machine which edges are the datum edges and what the basic sizes are then picks-up (using Renishaw probe) the surfaces. Computer outputs a report on whether part is in tolerance or not.

By: Rick Becker  Mon, 23 Apr 2018 11:21:47 GMT