Convert the program mm to inch

[Sekhar]

Hi team,

I did the program in mm and running smoothly. I am using 2015.1 CAD ++ PC-DMIS .When I sent my program for validation purpose to our customer, they are asking the inch program. I know the program can be started in inches, but after complete the program in one unit,
is there any way to change the whole program in to the other unit?. I have gone through the forum, but I can not find much recent informations.
Any help would be greatly appreciated.

[andrewb91]

You can't convert the features to inches, but you can change the dimensioning.

[bfire85]

As andrewb91 stated above, once program is written in a specific unit, it stays in that unit. However, you can change the dimensions to mm or inch. Question for you, what units of measure is the customer print in?

[Quality ish]

As andrewb91 stated above, once program is written in a specific unit, it stays in that unit. However, you can change the dimensions to mm or inch. Question for you, what units of measure is the customer print in?

Question is right on the money, IMHO.

I try to get our operators to measure the part they have in the primary unit on the print for two reasons: Often, when the customer has provided their own conversion, I've seen about 25% of them be inaccurate. Whether they round up, down, drop a decimal point when converting, whatever. If you measure to their secondary measurement, and it's good to that, but out in relation to the primary dimension, it's your fault, not the customer's. That's just an unfair reality. The second reason? It's just too easy to fat finger a calculator, drop a decimal, etc, etc. when converting. YOUR conversion may be wrong, when it was just easier to measure it in the unit they specified in the first place.

[pernilla]

I have a follow up question about this...
We have some parts that uses reference drawings for some features in addition to the original drawing, and while the original drawing measures in mm, some of the reference drawings uses inch. I've been translating them before but after reading this thread I realise it may not be the best solution.

So my question is, can you evaluate some measurements in inch while the rest of the program uses mm?

[AndersI]

As already mentioned above, a *dimension* can output either MM or IN. You could even add two identical dimensions, one presenting the result in MM and one in IN. The *program*, on the other hand, is not changeable. If you're not picking nominals from CAD, you will definitely get a rounding difference in your nominals, depending on if the program was created for MM or IN.

[pernilla]

I understand. Thanks!

[Sekhar]

Hi bfire85

customer print is in inches.

[bfire85]

Hi bfire85

customer print is in inches.

Hard truth: Program should of been in inches. Going to need to rewrite it.

[Sekhar]

Thanks all
I re write the program in inches.

[Paul Sarrach]

Question is right on the money, IMHO.

I try to get our operators to measure the part they have in the primary unit on the print for two reasons: Often, when the customer has provided their own conversion, I've seen about 25% of them be inaccurate. Whether they round up, down, drop a decimal point when converting, whatever. If you measure to their secondary measurement, and it's good to that, but out in relation to the primary dimension, it's your fault, not the customer's. That's just an unfair reality. The second reason? It's just too easy to fat finger a calculator, drop a decimal, etc, etc. when converting. YOUR conversion may be wrong, when it was just easier to measure it in the unit they specified in the first place.

Try? Make a work procedure that forces them. And if they don't follow that procedure right them up. Its a ISO violation now.

[Quality ish]

Sorry if I misrepresented myself. I am but a lowly Inspector. My word is far from "beyond contestation".

We just passed an AS-9100 recertification, and as far as I know, the issue never came up...

[Sekhar]

Hi AndersI

I write the program in inches and out put the result in mm and inches. I mean inch result for validation and mm for my shop floor. I use "go to" statement to separate them. The problem is I have around eight geometric characters to be out put . I can not find any option to switch in between inch and mm in the GD&T window. I do not understand how to address this issue.

[gibsonridge]

when you open your tolerance page look right under create & close button in the top right corner

[Mike Ruff]

Look at the code for the feature in question. You will see a toggle called UNITS=IN or UNITS=MM. You can change it right there

[AndersI]

In the XactMeasure dialog, click the Advanced tab - there you can select MM or IN, and in Legacy (as gibsonridge already described) in the upper right corner.

XactMmInch.PNGLegacyMmInch.PNG

[Sekhar]

Thank you all .
I switch them into the inches through the codes in the command mode.


When I switch them into the inches, I am facing another problem which is,

For example I got straightness value 0.001mm it become 0.0000 in inches(due to rounding). I consult with my customer they recommend to switch to 7 decimal places.

When I switch to 7 decimal places all my geometric dimensions(straightness, roundness, surface profile etc) result become just single Zero. Can some one tell how many decimal places the GD&T window can handle?

[gibsonridge]

i get 7 places if programmed @ inches 6 places @ metric

[LaserJay]

Dawn of the dead post.. lol If AndersI is one of the last comments you know this post is old
Welcome to the forum!