Thanks David for perfect video. What is the change if we add profile tolerence ? Both of them make same job ?
@davidslopsema437412 күн бұрын
Profile tolerance without any datum references would do exactly the same thing. Profile tolerance with datum references could do a lot of different things. I'll have more videos coming about that.
@Alpaslan-n8p12 күн бұрын
Could you please add video also about mathematically defined surface, why we use it ? Usage example etc .( asme 4.13)
@harikumar475717 күн бұрын
Sir, nice lecture. Is this Datum B calledout on surface of cylinder or axis. Also at 1:05 ,what is the gauge size if Datum B( RFS ) and B(MMC).How it is changing in both condition.kindly a replay.
@davidslopsema437412 күн бұрын
Datum feature B is the pin. Datum B is the axis of the pin.
@davidslopsema437412 күн бұрын
If datum feature B were referenced MMB, the gage would have a fixed size hole, but we don't have enough information on the drawing to calculate the size of the hole in the gage. As it is, with datum feature B referenced RMB, the hole in the gage is a variable size so that it can exactly surround the pin with no looseness.
@harikumar475712 күн бұрын
@@davidslopsema4374 ok thankyou sir, for valuable replay
@muthyala72425 күн бұрын
You're the legend❤
@jaypanchal1997Ай бұрын
I love it. Respected sir, please continue this series through a step by step so that fresher mechanical engineer like me learnt it in a practical way. Salute to you 🫡
@孙小圣-d8uАй бұрын
谢谢!
@darktetor2 ай бұрын
Not sure I understood this correctly but will rewatch later when i have slept. Nonetheless thanks for the video!
@whiterunsteward74772 ай бұрын
yup
@elisecube6222 ай бұрын
I'm not familiar with this but I love it
@QwertyCanada2 ай бұрын
Thanks for sharing!
@kaushikiyer9445 Жыл бұрын
I have some questions regarding pattern as datums. Do you have any socials through which i can contact you?
@mohamedelsayed4 Жыл бұрын
Amazing Explanation, Thanks Dave>
@jcorcoran6686 Жыл бұрын
why the heck would you take a pic of dog crap and put it in a video...sick
@DanDassoulas Жыл бұрын
How about threaded holes with inserts?
@michalfilipak64652 жыл бұрын
Haló haló??
@kiranbg80632 жыл бұрын
Hello Sir, Thanks for the explanation. I have one question. What to do if we exceed the stack line. i.e, what to do when I need to add additional stack line after 40 stack lines are consumed ? Please help.
@davidslopsema4374 Жыл бұрын
It is not expandable past 40 lines. You would need to divide your stack up into two stacks and add the results.
@QwertyCanada2 жыл бұрын
I know it was not covered probably because the focus of video was something else, but how do they know where to put those holes to begin with? Even if the basic dimensions are put there, we need some another datum feature frame, only for positioning the four holes? No?
@QwertyCanada2 жыл бұрын
Brilliant
@jasondesur89123 жыл бұрын
Can a pattern of slots be used as datum feature? Thanks
@MO-uj9fo3 жыл бұрын
Just sent over an email. Hope to hear back. Thanks for the information on the website.
@tjvanderloop16863 жыл бұрын
Good information on tolerance "Stack-up" and that is very useful with "GD&T" and mechanical design-CAD. Thanks for all the work you do! Hope to see more down the road! T J (Tom) Vanderloop, Author, Technology-Instructor & Mechanical Designer; ATEA, AWS & SME Leader/Memberships
@tjvanderloop16863 жыл бұрын
Good analogy for the "Dog-Lovers" as shop-workers, the use of Profile is Awesome! T J (Tom) Vanderloop, Author, Mechanical Designer, & Consultant: ATEA, AWS & SME Member
@bmgri3 жыл бұрын
Hmm, ok, let's say I dimension a part with a pattern as datum and then go to assess my real part. Let's say your limited in the same way our inspection department is, and need to use a caliper. I pick one of the four holes randomly. I can check its size, but there's no position requirement yet. Let's say I conclude that the hole size is acceptable. I move onto the next hole. Can that hole's position now vary within its position tolerance, or, within its position tolerance PLUS the position tolerance the first hole could vary within given the single feature control frame??
@davidslopsema43743 жыл бұрын
You consider the first hole to be the center of the universe, and then with the other holes calculate position plus bonus plus datum feature shift. You can avoid a lot of calculations if you can have your inspection department give you hole sizes and locations and you can create a gage in CAD and create the part as measured in CAD and see if the part as measured fits on the gage in CAD. I explain this on my web page here: www.dimensionalconsulting.com/tolerance-of-position.html#cmm Otherwise if you need to do the calculations manually, I explain how to do that on my web page here: www.dimensionalconsulting.com/tolerance-of-position.html#advanced
@bmgri3 жыл бұрын
@@davidslopsema4374 awesome. I'll take a close look. Thanks!
@victoralcocer39263 жыл бұрын
Thanks, this helped me to visualize LMB
@HIENTRAN-ze9ju4 жыл бұрын
What if i have regardless material condition and regardless boundaries call out in gd&t means plz
@victoralcocer39263 жыл бұрын
You will have no bonus and no datum shift, only the position tolerance in the feature control frame regardless of the actual size of the features.
@Sumiyeco_boutique4 жыл бұрын
Other than being cleaner and “explaining” the intent better, what are the other quality manufacturing problems that the first examples bring?
@davidslopsema43744 жыл бұрын
I have seen this issue causing confusion when people do tolerance stacks. Other than that, I cannot point to any specific quality problems that it causes. It's just a matter of making the GD&T reflect how the part really functions.
@SuperSWguy4 жыл бұрын
Good tip, but for this example wouldn't you want to use MMC on the perpendicularly & position tolerances to take advantage of bonus (additional) tolerance, & MMB on datum features of size B & C to take advantage of datum feature shift?
@davidslopsema43744 жыл бұрын
Yes you would, if you want to allow bonus and shift, and/or if you want to use fixed size gage pins. If for some reason you could not tolerate the bonus and shift, then you would leave it RFS and RMB. It all depends on your product requirements.
@steelej_fx5 жыл бұрын
<3
@rahuldumu58595 жыл бұрын
haha...intresting
@CAMAROG96 жыл бұрын
LOVE the video. One question - despite the side of the feature that the arrow points to, is the number following the U symbol always OUTSIDE of material? Example - what if the scenario was pointing to the inside of the feature? Lastly - if you didn't reference datum features, would the profile become only a feature size control? Thanks!
@davidslopsema43746 жыл бұрын
Yes, the number following the U symbol is always outside the material. So if it were pointing at a hole, the number following the U symbol would allow the hole to get smaller. It can indeed control the size of a feature, but I still would not call it a feature of size. A feature of size always has a coordinate tolerance controlling the size.
@robertfischnich96056 жыл бұрын
Is there a method of reporting profile error using variable data? Historically, the formula used was max - min if crossing nominal or if all positive or negative error is observed, 2*max deviation from nominal.
@davidslopsema43746 жыл бұрын
I am not familiar with a standard method of reporting the data. I am guessing that would be determined by whoever requires the data.
@CAMAROG96 жыл бұрын
I have used the method of reporting my tolerance / my deviation from tolerance. Example for bilateral would be +/- 0.25 / over / actual result. The result could be anything from + to - 0.25. Also - if you wanted to, you could report in the basic feature box the range that you found. Example: Feature is 40mm and you report 39.8 - 40.22 (all acceptable applying that tolerance). Make sense?
@CAMAROG96 жыл бұрын
I forgot - when I do report actual readings in comparison to the basic features I do NOT accept or reject that data. The accept reject criteria is reported in the profile callout.
@davidslopsema43746 жыл бұрын
Please visit my web site at www.dimensionalconsulting.com
@davidslopsema43746 жыл бұрын
Please visit my web site at www.dimensionalconsulting.com
@davidslopsema43746 жыл бұрын
Please visit my web site at www.dimensionalconsulting.com
@davidslopsema43746 жыл бұрын
Please visit my web site at www.dimensionalconsulting.com
@davidslopsema43746 жыл бұрын
Please visit my web site at www.dimensionalconsulting.com
@davidslopsema43746 жыл бұрын
Please visit my web page at www.dimensionalconsulting.com
@josephalu52558 жыл бұрын
I enjoyed your video, however I can't find where to download the PDF file your talking about. Can you please advise me. Thanks
@CharlieSeattle110 жыл бұрын
The "Closed Loop" stack up method is much easier to work with.