Comments for Tec-Ease Blog http://www.tec-ease.com/premium/blog Just another WordPress weblog Tue, 07 Jun 2011 13:13:03 -0500 http://wordpress.org/?v=2.8.4 hourly 1 Comment on by Don http://www.tec-ease.com/premium/blog/?p=45&cpage=1#comment-142 Don Tue, 07 Jun 2011 13:13:03 +0000 http://www.tec-ease.com/premium/blog/?p=45#comment-142 The answer is "Yes". Identifying centers as datum features is shown in the Y14.8 standard. The answer is “Yes”. Identifying centers as datum features is shown in the Y14.8 standard.

]]> Comment on Datum feature symbol placement by Don http://www.tec-ease.com/premium/blog/?p=31&cpage=1#comment-140 Don Thu, 26 May 2011 14:31:41 +0000 http://www.tec-ease.com/premium/blog/?p=31#comment-140 The Y14.5 standard cannot possibly address every situation. The question to ask is "Will someone knowledgeable of the standard understand the meaning of the callout." In this case the answer is "Yes" This issue was raised shortly after the 1994 Y14.5 standard was issued. Section 3.3.2(f) does not disallow applying the datum feature symbol to a feature control frame that is controlling a surface. Take a look at Figure 6-51 of the 1994 standard. The datum feature symbol for datum feature E is attached to a circular runout tolerance which is a surface control. When this issue was raised in a committee meeting the response from members was "of course the datum feature symbol may be attached to a surface control". The meaning is definitely clear. Does this settle the disagreement? The Y14.5 standard cannot possibly address every situation. The question to ask is “Will someone knowledgeable of the standard understand the meaning of the callout.” In this case the answer is “Yes”
This issue was raised shortly after the 1994 Y14.5 standard was issued. Section 3.3.2(f) does not disallow applying the datum feature symbol to a feature control frame that is controlling a surface. Take a look at Figure 6-51 of the 1994 standard. The datum feature symbol for datum feature E is attached to a circular runout tolerance which is a surface control.
When this issue was raised in a committee meeting the response from members was “of course the datum feature symbol may be attached to a surface control”. The meaning is definitely clear.

Does this settle the disagreement?

]]> Comment on Hard gaging profile of a surface. by Don http://www.tec-ease.com/premium/blog/?p=36&cpage=1#comment-139 Don Thu, 26 May 2011 14:20:33 +0000 http://www.tec-ease.com/premium/blog/?p=36#comment-139 Yes, you can create a functional hard gage if you combine the profile of a surface tolerance with a position tolerance modified at MMC. The profile tolerance controls the size and form of the slot while the position tolerance controls the location and orientation. Here is a little trick I have used when the profile tolerance is large enough and if the part isn’t very thick: If you use only profile on the slot you may create a functional hard gage at the inner boundary of the slot. Then use a “NO-GO” wire that may not pass between the gage and the slot surface. The ‘NO-GO’ wire diameter would equal the value of the profile tolerance. Yes, you can create a functional hard gage if you combine the profile of a surface tolerance with a position tolerance modified at MMC. The profile tolerance controls the size and form of the slot while the position tolerance controls the location and orientation.
Here is a little trick I have used when the profile tolerance is large enough and if the part isn’t very thick:
If you use only profile on the slot you may create a functional hard gage at the inner boundary of the slot. Then use a “NO-GO” wire that may not pass between the gage and the slot surface. The ‘NO-GO’ wire diameter would equal the value of the profile tolerance.

]]> Comment on What you always wanted to know about Y14.5. by Wendy http://www.tec-ease.com/premium/blog/?p=3&cpage=1#comment-135 Wendy Tue, 03 May 2011 17:59:31 +0000 http://www.tec-ease.com/blog/?p=3#comment-135 Thank you for the kind comments. We want to do our best to help others understand GD&T. Thank you for the kind comments. We want to do our best to help others understand GD&T.

]]> Comment on What you always wanted to know about Y14.5. by Wendy http://www.tec-ease.com/premium/blog/?p=3&cpage=1#comment-134 Wendy Tue, 03 May 2011 17:59:02 +0000 http://www.tec-ease.com/blog/?p=3#comment-134 Thank you for the kind comments. We want to do our best to help others understand GD&T. Thank you for the kind comments. We want to do our best to help others understand GD&T.

]]> Comment on What you always wanted to know about Y14.5. by Perry Betterley http://www.tec-ease.com/premium/blog/?p=3&cpage=1#comment-127 Perry Betterley Fri, 14 Jan 2011 13:00:07 +0000 http://www.tec-ease.com/blog/?p=3#comment-127 I think this will be a great place to discuss the Y14.5 Standard and how to apply the principles in our business. I think this will be a great place to discuss the Y14.5 Standard and how to apply the principles in our business.

]]> Comment on What you always wanted to know about Y14.5. by tammy schultz http://www.tec-ease.com/premium/blog/?p=3&cpage=1#comment-124 tammy schultz Mon, 03 Jan 2011 19:08:49 +0000 http://www.tec-ease.com/blog/?p=3#comment-124 Great Blog. Can't wait for more on GD&T! Great Blog. Can’t wait for more on GD&T!

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