Ø + / + tolerance

[YGOLORTEM]

It's been a while since I've had to do this in PC-DMIS so please bear with me.

I have a Ø 0.250 with a +0.001 / + 0.001 tolerance. Is there any way I can get the + /+ to show in the report vs. ±?

[BKulpa]

Why would you have +0.001 / +0.001? Isn't it the same tolerance?

[ThePudds]

Guess I'm a little confused about the question as well. Never seen +/+

[YGOLORTEM]

Yes It is actually + 0.003 / 0.001.. sorry my typo

[YGOLORTEM]

I'm guessing that it will be easiest to dimension it as 0.252 ± 0.001?

[VinniUSMC]

Yes, it is possible. There's a setting, I think in the F5 (but I'm not sure) that makes it so you must input "-" to make a minus tolerance. So, when you don't input a minus, then your tolerance is plus/plus.

Yes, F5>Dimensions tab, check "Minus tols show negative".

Then, in the minus column, you'll see that you must type the "-" for a negative tolerance, and leaving out the "-" makes it positive.

[YGOLORTEM]

Thanks Vinni...I knew there was a way I just couldn't remember

[RandomJerk]

Yes. Make the PLUS tolerance .003, the "Minus" tolerance -.001..

By making the minus tolerance a negative number, it will subtract that from nominal, and you get a positive value. 3-(-1) (3 minus negative 1) = 4

If it were one sided negative you'd make the positive tolerance a negative value.

EDIT: Though this isn't what you're looking for I think. As mentioned earlier, go to Edit...Setup (F5), dimension, then under "Output options" there's a box that shows minus tolerances as negative. This is global, so all your tolerances that are negative will show as negative if you don't give it a sign. a negative value in the minus tolerance will show as positive.

Confusing?

[YGOLORTEM]

Thanks RandomJerk appreciate it

[YGOLORTEM]

Yes. Make the PLUS tolerance .003, the "Minus" tolerance -.001..



EDIT: Though this isn't what you're looking for I think. As mentioned earlier, go to Edit...Setup (F5), dimension, then under "Output options" there's a box that shows minus tolerances as negative. This is global, so all your tolerances that are negative will show as negative if you don't give it a sign. a negative value in the minus tolerance will show as positive.

Confusing?

Not at all

[Matthew D. Hoedeman]

When entering the tolerances, enter 0.003 for the "+" tolerance and enter a NEGATIVE 0.001 for the "-" tolerance. That will give you the correct tolerance band (as normally you just enter the absolute value for the negative value). OR you can change how the tolerance values are entered in the F5 setting menu, dimension tab. Mark the box for 'negative tolerance shows as negative'. BUT, if that box is marked, then you MUST enter negative values as negative for all dimensions.

[YGOLORTEM]

Thanks Matt...I knew there was a way I just couldn't remember

[VinniUSMC]

Oh, I'm so used to the default that I didn't realize you could make a positive by just typing "-", lol

[YGOLORTEM]

Guess I'm a little confused about the question as well. Never seen +/+

Using +/+ or -/- tolerances example: shaft is 3" +.005/+.010, hub 3" -.005/-.010. Means shaft can be 3.005 to 3.010 and hub 2.995 to 2.990.

[YGOLORTEM]

Old school or old timer eng-nears use/d this method. Not quite as common nowadays but still see it on quite a few mating components

[Obelix]

Not common in US but it is normal tolerance in ISO

[Kp61dude!]

It's a mental thing for them machinist. Tells them pipi is fitting in a tight hole... keep away from MMC.

[vpt.se]

ISO-tolerance.