GD&T Modifiers: MMC, LMC and MMB in practice

In today's decentralized environment, in which parts can be manufactured at one location and assembled at another, incorporating material modifier symbols is part of a good GD&T definition. The addition of these symbols helps minimize the rejection of functional parts, reduces production costs, and most importantly of all, brings you closer to the true functional definition of the product. Although universal, these symbols are often misunderstood and under-used.
During this technical webinar our experts will present how to take advantage of GD&T Modifiers using concrete examples. We will also demonstrate how to integrate these symbols into our inspection software VXinspect.
What you will learn
• The concept of bonus tolerance
• The influence of material modifiers symbols on the development of inspection tools
• How to correct parts qualified as out of tolerance in order to make them functional
• How to use the minimum and maximum material symbols
• The calculations behind datum simulators

[@tjvanderloop1686]

Thank You for a Great "Graphic-CAD/CMM Validation" for the Modifiers MMC-LMC & Datum MMB. Please leave the webinar Video on line as the Students at Chippewa Valley Technical College, would benefit from your work!
T J (Tom) Vanderloop, Author, Mechanical Designer, & Consultant; ATEA, AWS, & SME-Life Leader & Member

[@prakashr5866]

Excellent Webinar... You cleared all my doubts regarding LMC, MMC and RFS... Thanks a lot...

[@viswa1711]

Thank you both for the excellent explanation of MMC, LMC, MMB and LMB concepts

[@charlesdrury9712]

Sorry typo that should be I hope I did not offend you

[@mohamedbilal864]

Thanks a ton! These are just gold..

[@abdulsardar3769]

Thanks for understanding these concept very clearly...!!!1

[@tarzdan113]

Much appreciate for your effort!!

[@YourAnonymousGuy]

Best explanation. Thank you for this wonderful video!

[@sathesh1600]

Excellent explanation. Thanks bro👍

[@chankokkeong802]

Masterclass

[@manuboker1]

Wonderful Lectures ! Thanks.

[@aaaaa4697]

Thanks!

[@adityasinghthakur2071]

perfectly explained!!

[@rohitbhosle55]

Thanks for explaining shift concept & concept of Virtual condition help us to have Inspection pin of virtual size.. thanks cleared doubts 🎉

[@sarthhakvashist4263]

Hello Creaform team. I found this webinar very useful and I aspire to apply for a job in your company in the Europe based office/ design center. Please suggest where to apply and are the vacancies available.

[@charlesdrury9712]

Wow I think it’s very interesting it looks like a person could learn a lot especially with the mechanical background and I truly hope I didn’t offend you with a little difficult with your accent and you’re talking real fast but apparently you’re very intelligent so I hope I did not send you God bless

[@stuartpilling2643]

I learned a lot from this especially up to the 30 minute mark when it changes to the brake disk example on MMB. For the first part my Position calculations don’t match and range from 0.89 to 1.366, however using the same maths for the second part with MMB applied they do match the 1.000/1.001 figures from the software. I don’t understand this part, any help would be greatly appreciated?

[@amitchaturvedi5318]

Hi, Thanks for sharing this vedio. It will help us alot.
After 37 mins, When we use MMC in datum B also. I didn't understand the method and result of using it.
It would be so much helpful if you help me out to understand it.

[@huyphan9303]

thanks

[@yogeshhadiya4479]

Excellant

[@MrSipi1988]

34:20 I can see at lot of cases that the B datum is marked with position tolerance relatively to A surface. In our case could we use perpendicularity either? I mean in that case they are the same, right? Do we have any advantage, disadvantage how it is marked? Thank you

[@MrSipi1988]

@@buffalobill8 Thank you, I need to fix to perpendicularity (or angularity) in this case.

[@rkmk1638]

I need to learn gd and t deeply

[@a.garces5312]

Thank you very much for the excelent explanation. I have only a question, hope it is no stupid.
Could we apply a MMB without a material modifier? For instance, could we have something like ¦ DIA .01 ¦ A ¦ B (M) ¦ OR do we NEED to go to ¦ DIA .01 (M) ¦ A ¦ B (M) ¦?
I hope I made my question understandable enough. It is quite difficult to replicate the symbols. Thanks!!!

[@zaknefain100]

Does that fit the functionality of the assembly? A Feature of Size, without a modifier is a little strange in terms of functionality.

[@a.garces5312]

@@zaknefain100 I do not know. Never seen it. It is just an academic question. I am still learning and can't fathom all of the nuances of GD&T. Do you think it is possible or functional? Thanks!

[@pauldarthurs]

Theoretically, it may be possible. However, I think the important question is whether or not that would make sense from a functional standpoint. A case like the one you mention would imply that there is "play" on the datum, but no play on the feature itself. This type of case would most likely be quite uncommon.

[@pranav3813]

Unable to get the MMB concept properly, can anyone give link to video which explains is with practical example?

[@wickworth6167]

this helped me.
czcams.com/video/dlTZasL753I/video.html

[@aKaCrowley]

IS this ISO or ASME?

[@peaceofmind6882]

Asme

[@41akc]

thanks but something is wrong. You make the part pass the inspection.. Not give the correct form or necesseraties.. such as you sad "carefully use LMC" that couse of lack of yellow ring. This is not a solution or unique cause of using LMC or MMC