Extracted Integral Feature - An approximated representation of the real feature (integral), obtained by extracting a finite number of points from the real feature (integral). RE: slot call out It's associative and works great until the views get moved around. If I were to place a direct dimension on the slot, I would also have to use non-basic dimensions all the way back to the datum. Part would weight the least amount when feature is manufactured at this size. ChrisSr. Apply a profile tolerance to the outline. wgchere (Mechanical) The width of each of your four slots is controlled with respect to sides of your raised surface. It is the opposite materials condition to maximum material condition (MMC). Parallelism - Parallelism is the condition of a surface, line, or axis which is equidistant at all points from a datum plane or axis. 5 Jul 05 17:33 The centrelines are only relevant to the specific examples in the standard. Tunalover (Mechanical) The first drafting book I was taught from was by French and Verrick, and the section on descriptive geometry is as valid today as when it was written. Tunalover Least Material Requirement LMR - This term implies that condition of a part feature of size wherein it contains the least (minimum) amount of material, examples, largest hole size and smallest shaft size. How about you apply a profile tolerance of 1mm around both edges of the slot and a +/-0.1mm tolerance across the width? Engineering Design Manufacturing Definitions and Terms. You can define one side of your slot as a fourth datum. Typed-in dimensions are bad practice in CAD, especially 3D CAD like SolidWorks. There's more knowledge of forced air cooling wrapped up in that one book than anywhere else! THRU is by default for all features. RE: slot call out Expressions of these tolerances refer to limits of size, flatness, straightness, parallelism, perpendicularly, angularity, roundness, cylindricity, profile of a surface and profile of a line. 5 Jul 05 13:21 microdesign (Mechanical) RE: slot call out 4 Oct 05 15:23 Failing that the slot size and two full radii, if you specify the length and width of the slot and the radii and start using limits you can end up with a flat or “short” radii on the ends, is that what you want?I do however have no idea about American standards. according to the Y14.5 if it is not clearly illustrated as a thru 'hole' it should be labeled as "THRU". RE: slot call out This will be the distance from the centerline of the hole to the edge of the part. That is what I have, a radiused rectangular slot. It's associative and works great until the views get moved around. RE: slot call out Posting in the Eng-Tips forums is a member-only feature. RE: slot call out Expressions of these tolerances refer to the category of geometric characteristics containing position, concentricity, and symmetry. It gives me a sloppily located but very parallel surface, which could be exactly what I want. RE: slot call out I think the proper way to specify a slot tolerance zone is with a rectangular tolerance zone prescribed by a composite feature control frame (IMHO).Regards,SrGilberto GD&T Tolerance Analysis Calculators Heckler (Mechanical) The end radii are indicated but not dimensioned. "FULL R" eliminates these undesirable sharp corners. Chris, Sr. 4 Oct 05 14:19 22 Oct 05 22:49 Clearance Fit - A clearance fit is one having limits of size defined such that a clearance exists between mating parts when assembled. H��W]s�8|ׯ�#ue"H�`�i'Yg+�U�ݗxh 5-14, or 5-43 of ANSI 1994, or is that only usable in ref. Chris, Sr. As it is continuous, it has 2 separate surfaces.If I place a direct dimension on it, I would have to do it for all segments seperately, wouldn't I?If I place a +/- tolerance on it, It connot be dimensioned with basic dimensions, can it? That is what I have, a radiused rectangular slot. When I right-mouse-click, the Insert Callout feature is not there. 22 Oct 05 13:08 You have to hide the dimensions of course! The outside edge of the slot winds up where it winds up. It is not technically correct per ASME Y14.5-1994. 5 Jul 05 17:33 RE: slot call out Hello all!I wish to GDT a continuous (looped) slot, below a surface, which does not need special (tight) control on its location, but mostly needs control of the width independent of location.Is there a control for one wall of the slot relative to the other, when neither wall is a datum? drawoh-I've got an oldie but goodie too: FAN ENGINEERING, 1931, Buffalo Forge Co. The following are definitions commonly used throughout industry when discussing GD&T or composing engineering drawing notes. Yes, that was my thought also, but in the interest of using only GDT on the part, I wonder if there is a proper way to do it. 27 Oct 05 17:38 Least Material Boundary (LMB) - This term implies that the condition of a datum feature of size wherein it contains the least (minimum) amount of material for the stated limits of size; examples, largest hole size and smallest shaft size. 5 Jul 05 14:34 It was changed by ANSI Y14.5M-1982. GD&T Interpretation Syllabus 26 Oct 05 13:57 This saves you the extra view. drawoh,What is the section of the std that describes +/-tolerances? JHG Folks-Why use drafting references from 1941? drawoh,What is the section of the std that describes +/-tolerances? | G&T ISO 1101 Training | Online GD&T ASME Training JHG this standards stuff is better than Bible-bashing! Hello all!I wish to GDT a continuous (looped) slot, below a surface, which does not need special (tight) control on its location, but mostly needs control of the width independent of location.Is there a control for one wall of the slot relative to the other, when neither wall is a datum? I would reluctantly recognize and accept the ANSI depth symbol and a numerical value applied to the length or the width of the slot. GD&T Training Classes Overview Roundness - Roundness, also called circularity describes the condition on a surface of revolution (cylinder, cone, or sphere) where all points of the surface intersected by any plane are; (1) perpendicular to a common axis (cylinder, cone), (2) passing through a common center (sphere) are equidistant from the center. ewh (Aerospace) with a centerline and a control based on center?Can I dim. If the dimension is the same for all segments, you only have to dimension it once and note how many instances. Often the application of dimension origin is referred to as a coordinate dimension. This allows production of the feature without having to make/buy the specific slot punch. No arguing with the standards. ringman (Mechanical) 19 Oct 05 19:58 The standard omits the word "SLOT" from the callout, and states that the end radii are to be indicated but not dimensioned. 19 Oct 05 12:34 microdesign, It depends on what you want to control. Hole callouts use Hole Wizard information when you create a hole with the Hole Wizard. If you call out "2X R FULL", it is a radius exactly the width of the slot (same tolerance). RE: slot call out Drawing callouts marked "KEY" define "key characteristics" that are considered especially important for fit, function, safety, or other reasons. SrGilberto (Mechanical) Datum Reference Plane - is a set of three mutually perpendicular datum planes or axis established from the simulated datum in contact with datum surfaces or features and used as a basis for dimensions for designs, manufacture, and inspection measurement. microdesign (Mechanical) How about .020? 4 Oct 05 15:29 26 Oct 05 09:43 Now imagine a rectangular slot around the base of the projection. RE: slot call out RE: slot call out RE: slot call out tunalover, I do not use a drafting reference from 1941, at least, not for drafting. A modifier alters the applicability of the specified datum or feature by restricting the application to a specific condition and allowing a variable tolerance boundary under specific conditions. Form Tolerance - A form tolerance states how far an actual surface is permitted to vary from desired geometric form. Tunalover I would reluctantly recognize and accept the ANSI depth symbol and a numerical value applied to the length or the width of the slot. Full Indicator Movement FIM - The total movement of an dial or digital indicator where appropriately applied to a surface feature while measuring surface variations. Also, refer to page 143 figure 5-47 for another example of a typical slot. drawoh (Mechanical) I was able to fit another view on the page and my checker was happy with it. It probably had to do with ISO standards and they dropped it. drawoh (Mechanical) Ok, there are three ways according to ASME standard to call out a slot hole. RE: slot call out If this is what you want, the specification is correct. 9 Indications on drawings On technical drawings, undercuts may either be shown in detail, giving all dimensions, or schematically, giving only the designation. ctopher (Mechanical) RE: slot call out Engineering Forum THRU is by default for all features. ewh, I have done what you describe, using AutoCAD. If it is smaller, it produces a "hotdog". I remember when "FULL" was dropped. RE: slot call out If this is what you want, the specification is correct. Tunalover ewh (Aerospace) microdesign (Mechanical) 1999, unless their website is out of date. 20 Oct 05 09:41 KPSI, kpsi: kilopounds per square inch, that is, thousands of pounds per square inch: See discussion at synonym KSI. microdesign (Mechanical) If the dimension is the same for all segments, you only have to dimension it once and note how many instances.You can use basic dimensions to locate it and +/- to definethe slot, or visa-versa. 26 Oct 05 14:09 RE: slot call out RE: slot call out Chris, Sr. 28 Oct 05 17:56 RE: slot call out Just the length x width (and tolerances) above a feature control frame to define positional tolerancing. GD&T Training, Engineering Design Manufacturing Definitions and Terms, GD&T Training Geometric Dimensioning Tolerancing. Mechanical Designer, CADSolidWorks 05 SP3.1 / PDMWorks 05ctopher's home site (updated 06-21-05)FAQ559-1100FAQ559-716RE: slot call out drawoh (Mechanical) Ok, there are three ways according to ASME standard to call out a slot hole. 4 Oct 05 14:01 Just the length x width (and tolerances) above a feature control frame to define positional tolerancing.Keeping in mind that these drawings are 'pictorial representations' and CAD is the MASTER. RE: slot call out If you did not care about this, everything is fine. 11 Jul 05 18:03 I remember when "FULL" was dropped. drawoh-I've got an oldie but goodie too: FAN ENGINEERING, 1931, Buffalo Forge Co. ISO 1101. Already a Member? 26 Oct 05 13:57 A basic dimension should always associated with a feature control frame or datum target. Definition Per. The first time you see a callout can be a little confusing, but it’s pretty straightforward once you know what the numbers are meant to stand for. What Is GD&T Symbol: . It is the opposite materials condition to maximum material condition (MMB). drawoh (Mechanical) this principle. one side of the slot and then have a GDT control on the slot width relative to the side wall location?Thx,Davin
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