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  • DatumTarget Points

    Hello, I have a question about dimensions and Target Points. In the attachment I have made a very simple drawing with our problem. It concerns dimension 9.2 ( General limits +/-0.5mm) The product is a casting, so Target Points have been added…

  • legacy profile

    Is anyone here familiar enough with legacy profile to explain the difference between form only and form and location? I think that form and location locks to the origin, but i am not sure how the form only works. I have a customer who wants to use legacy…

  • Datum Alignments for dummies

    Ok, I'm sure these questions have been asked in some form or another and in fact, I'm sure my last post might have even touched on this topic, but the gurus here tend to espouse knowledge that's a tad bit over my head. So I'm looking for a "For Dummies…

  • Using a datum feature set (4 holes in this case)

    Hello, I'm new to this and I came across a part (for the first time) that has datum feature A as a plane and B as 4 holes. Other features on the part have to be positioned within .015" with respect to -A-B-. How do I use the 4 holes as a datum in…

  • Location of edges with hole pattern as datum

    I have manufactured two parts that are going to be assembled. The top part with four holes is going to be assembled to the bottom part consisting of four pins and an elevated L-shape (See Figure), such that when the top part is placed on top of the bottom…

  • A-c datum alignment

    Opinion needed: Was wondering if it was possible for one of these holes (dat-c-) to give good t.p readings. Since the parts is symmetrical all 3 holes should be used with dat-a- for an alignment (a-c in feature control frame). So it would be possible…

  • FCF True Position, Adding MMC on Datum

    Hello, I am trying to create a true position command using FCF. I have a MMC on Datum B. Datum A is the surface perpendicular to the hole and Datum B is the OD of a part with various holes on a Bolt Circle. I set up the true position and add maximum…

  • Lack of confidence in CMM

    I've been using the CMM for a about 4 years now in a job shop. We only use it when we *need* to (when we need to produce an inspection report for the customer). I'm the only CMM operator. Running 2012 MR1 CAD. I have several parts that I need to inspect…

  • Possible illegal gd & t callout

    I believe I've stumbled across an incorrect use of Runout to a Flat Datum-A-Plane. Imagine a bolt with a flat head: this is called out as Dat -A-. It also has a Flatness callout to itself, which is fine. The threaded shaft has a Runout callout to Datum…

  • Can a centerline be contructed and used as a tertiary datum?

    Hello all I'm wondering if a centerline can be constructed from a basic dimension and utilized to make a centerline to make as datum C. Datum A is the face of the part that will mate with another in assembly ( the most critical) Datum B is a plane perpendicular…

  • PC-DMIS Datum definitions 2 charaters?

    So im programming this part that has 46 little slots around the part that each call out one primary hole as Dat_D. So I need 46 Dat_D's. PC-DMIS only lets you use 2 characters to define a datum. What i was also thinking about doing is just Defining and…

  • Checking Pitch diameter

    Anyone know how to check an external (due to old rule number 3) thread for pitch also so i can use it as a Datum ? Any simple step-by step direction would be awesome!!!

  • First time using B-C as a tertiary datum

    Had just a quick question, it seems it may be as elementary to most on this forum about a B-C Tert. Datum I need to know for sure if I did this correctly. I have a flat part with datum A as the plane which I leveled and origin in Z I have a center…

  • Width @MMC as a primary datum

    I have got a problem how to "learn" PCDMIS 2012 MR1 datum features of ASME Y14.5-2009. When I have drawing specified width as a primary datum @MMB what features I can use? I need to simulate "hard gage". Mid plane doesn't work with MMB condition…

  • True Position of holes, without Diameter symbol in Control Box??

    let me lay this out for you guys and gals the best I can: I have Datum A wich is a inside Circle recessed into the top of the part. We will call this "Datum A" I have another recessed circle on the bottom of the part. We will call this "Hole"…

  • Multiple datum form 3 cylinders

    Hi all, I am struggling with this drawing. There is multiple datum AM-BM-CM/D what represent intended hard gage. Datum A to C are from cylinder, datum D from two flats bottom. Do you have an idea how to setup multiple datum with modifiers? Picture…
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