Per ASME Y14.5-2018
7.12.4 Pattern of Features of Size RMB
When RMB is applicable in a feature control frame to common datum features of size used to establish a single datum, the true geometric counterpart of each feature shall be fixed in location relative to one another. The true geometric...
Per 8.4.4 (ASME y14.5-2018):
Cylindricity may be applied on a unit basis as a means of limiting an abrupt surface variation within a relatively short length of the feature.
Does anyone knows how this callout supposed to work? Is the tolerance zone conical or cylindrical?
I cannot find any...
In fig 7-39/ ASME Y14.5-2018
I think we all agree that the two bores should be “squiggly” (in the same way the outside diameter is shown a little “bumpy”), but my question is:
Do you think the correct way is to show the two (“squiggly” to be) holes slightly rotated clockwise? (my red...
Why runout is used in this figure? (instead of profile)
What would be the difference between using profile (maybe even with dynamic profile modifier) instead of currently shown total runout?
Are there any mathematical difference between shown total runout and profile (again with dynamic profile...
I would like to know what is the AIAG (Automotive Industry Action Group) equivalent of 5% resolution requirement from VDA5 (Quality Management inthe Automotive Industry)
Basically, I am asking the following:
VDA 5 has the requirement shown in the picture below (5% of the resolution).
What is...
ISO GPS system:
Can UF and collection plane be applied together?
(UF above the tolerance indicator and collection plane as a supplemental indicator)
I don't have access to all ISO GPS standards, but in the ones I have I cannot find an applicable example where UF and Collection plane are used...
Fig 9-7 / ASME Y14.5-2009
If total runout defining datum feature D is replaced by position callout would you consider that the newly created position to be self-referencing (and hence not valid)?
Reasoning: I am thinking that position is checking the UAME and since D is secondary in the FCF...
ASME Y14.5-2009
Question #1: I have an internal checker who is claiming that would be wrong (illegal) to add flatness on the surface where datum targets area A (Ø6) are shown.
By the same token,
Question #2: adding a perpendicularity callout (to A primary) for the surface where datum...
(I asked this question in a different thread - with no answer- and I am going to ask it on a separate discussion too)
Do you think it is ALLOWED (per rules, regulations and stipulations) by the ASME standard to dimension a feature in an ISO view?
Scenario:
A 2D drawing is chosen as a method...
3DDave and Burunduk,
Probably you won't agree with each other on what is the "correct" result of
8:2(2+2)
I am not taking sides just curious of your answers, if you will.
Is it 1?
Is it 16?
Probably that's why PEMDAS exist in the first place.
See below (in bold) how you can rely on job descriptions.....
Strong knowledge of product design and product definition
Previous CIPT, IPT or Systems integration experience
Exposure to manufacturing, quality, and aftermarket operations
Experience with Siemens NX and Teamcenter, extensive...
IF (again IF)
datum features B and C are to be modified at MMB or LMB
and
Note 3 is changed to "DRAFT ADDS MATERIAL"
what would be the appropriate sizes of the applicable boundaries? (sizes of datum feature simulators)
(from ASME Y14.8-2009)
MMB(B)=? MMB(C)=?
LMB(B)=? LMB(C)=?
I would like to know, from your perspective, which features should be assigned as DATUM FEATURES when trying to define casting drawings?
Otherwise stated, what would be some good selection criteria in order to successfully define such drawings (casting drawings)
Look like there are many choices...
If datum feature A is to be defined which option would be the best:
- plus-minus size and relationship to the primary / secondary --such as pos| Ø.xxx|B|C|
or
- basic size diameter Øxxx and profile|xxx|B|C|
(B and C being primary and secondary datum features, not shown on this drawing from...
What is the best way to take advantage of datum feature shift offered by A(M)-B(M) callouts.
(Software Calypso version 2014 5.8.2 service pack 5)
See attachment ISO 5459:2011 for A-B concept (shown RMB per ASME Y14.5 terminology)
I would like to know how A(M)-B(M) is calculated and how to use...
My understanding of CMM measurements (done mostly in agreement with ISO) is limited, so I would like to ask some questions for clarification. Pretend you have a PERPENDICULARITY callout Ø0.05 to datum feature A.
When the CMM is qualifying this cylinder’s perpendicularity how this process is...
Question for the group":
(Ref: ""maximum wall thickness at one spot" vs. "maximum consistent wall thickness." from a previous discussion)
How the stackup -minimum and maximum wall distance- change (if it does ) , IF I would say that:
X maximum = maximum possible distance that can ever...
Easy question:
What is the CMM"s way to report the actual local size per ASME Y14.5, for a pin for example?
(.500±.010 pin measured on the CMM).
As far as I know, for a pin, the outer tangential and min circumscribed algorithms should be the same, but that is only taking care of the envelope...
I had a dispute with the author few days ago on about the value added of secondary datum feature B in the circular runout in the unless otherwise specified note.
Do you think B is provided any value as a secondary datum feature in the circular runout?
I would love to hear your opinions.
Thank...
I have noticed this "bad" verbiage on this slide.
No wondering why "average" users often confuse additional tolerance (bonus tolerance) with datum feature shift.
The question and more like a general discussion: do you agree to use the word "bonus" as indicated in these slides...
