Does any one know how to create a square in dimension line , thank you
It is called a basic dimension.
Basic dimension - Wikipedia
Are you just trying to box the dimension? Then any of these should work for you:
Shows up like this when the radius is inside the arc:
Specifically with ANSI set to the dimension standard in options.
Thank you, @Dan Pihlaja, I did it. Do you know the meaning of that square?
Could you expand on this a little bit? So it is a theoretical exact dimension. What makes it different than any other dimension placed without a reference or tolerance note? Are normal dimensions to be considered "within the range given in the tolerance block" while a basic is to be considered exact? Wouldn't that be essentially the same thing as giving it a tolerance of say 5 places?
Basic dimensions, when you are using the ASME Y14.5M standard, signify that this dimension is a representation of the theoretical exact number. This "dimension" has 0 tolerance. The "feature" that is being dimensioned however does have a tolerance, and the basic on the dimension is telling you that the tolerance is coming from a Feature Control Frame somewhere on the print. The shape and size of the tolerance zone for this feature is then determined by what is in the feature control frame.
(this picture is just an example).
In the above picture, the dimension should be coming from one of the datum points signified in the Feature control frame under the hole dimension.
The picture shows that the "theoretical exact" hole is 0.776" from the datum. The tolerance for this hole is then taken from the feature control frame. In this case, the position tolerance zone shape for the hole is a cylinder that has the same length as the hole depth and has a diameter of .002", centered on the theoretical exact centerline of the hole. This means that, when the actual hole is manufactured, the centerline must fall inside the zone created by that cylinder. There is no tolerance on the 0.776 dimension at all.
If the feature control frame were NOT under the hole dimension, then applying basic to the dimension would be incorrect and you would then add a tolerance to the dimension, whether this be from the title block, notes or directly onto the dimension. If you have a hole that has a horizontal and vertical dimension added to it that has a tolerance of +/-.001 to both the horizontal and vertical dimensions, then this would be similar, but not the same as the above referenced feature control frame. The reason that it is not the same is that, in the case with the vertical and horizontal dimensions, the tolerance zone is now in the shape of a square. And you can see that if the hole, when manufactured, were to be made a the limits of those dimensions, then the hole would fall outside the zone that is specified by the feature control frame.
Studying, understanding and keeping up with the ASME Y14.5M standard takes about as much work as studying and keeping up on all the cool tips and tricks inside Solidworks. Some people literally have entire classes dedicated to ONLY learning the ASME Y14.5M standard.
Thank you Dan I have learned something new again today, along with gaining an appreciation for working on larger machinery rather than in the world of exact precision.
Since I have learned something new I can now go home and get ready for the Skillet / King and Country concert tonight. We are helping the Compassion Intl. booth.
Love for King and Country these guys ROCK and they love interacting with the crowed! If you ever get a chance to go to there concert DO NOT hesitate.
I digress, Thanks @Dan that is an excellent explanation of Basic dimension I as well have learned something today.
Is there any forum where I can post my ask about the meaning of tolerance sign?
You can post is here and we can try and help you. Just make sure that you specify that it isn't a specific Solidworks question (I have done that before).
Alternatively, I have seen good things from here: Eng-Tips Engineering Forums
Thanks @Dan Pihlaja
May you help me in this post:The meaning of positional tolerance and profile tolerance
Zero Positional Tolerance is always a fun one to try and explain to people. This write up sums it up pretty well.
Please mark Dan's reply as Correct (see #3 at Some very important steps if you are a NEW FORUM USER.... ).
For those of you asking about tolerances, I would highly suggest finding a GD&T text book, and reading up.
If you're designing parts with ISO standards, and using GD&T it would be a wise investment.
Here is a link at Amazon Geometric Dimensioning and Tolerancing Professional Certification — ASME Y14.5.2
Christopher Thanks for the link there is a treasure trove of info on GD&T there.
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