Trailing zeros

I know i'm probably being dim today but.......

I would like to dimension a drawing using a tolerance table in the
title block as follows:

No Decimal Places +/- 1
1 Decimal Place +/- 0.5
2 Decimal Places +/- 0.1
3 Decimal Places +/- 0.01

The thing I need to do is be able to force individual dimensions to
have different numbers of trailing zeros

How do I do this

Thanks,

Kev

 

Tools --> Options --> Document options --> Detailing
Find "Training zeroes", in the "Dimensioning Standard" block.

 

This sort of "tolerancing" should never have been "invented".

 

I think you want to look for TRAILING ZEROES and then you set your
precision of each dimension according to what you would need for
tolerances. Although ISO standards usually doesn't require the trailing
zero but what are standards if we can't come up with what works for us.

 

How do you tell 1.0 +/- .5 from 1.000 +/- .0005 with 1.000?
Not to mention all the other errors when/if someone tries to
build a model from those dimensions?
And consider what happens to the nominal ...

 

Cliff,

According to ASME Y14.5M-1994, 1.0 is the same as 1.00 is the same as
1.000, 1.0000, 1.000000000000000000000000000000 etc. The nominal is
unchanged. I'm not entirely sure what the criticism is here.

Matt

 

I agree Cliff - but it's a new client and it's the way they do it!

Kev

 

Thanks All,

I was being dim - all comes flooding back now.

Cheers,

Kev

 

It's also extremely common.

 

1.5 dimensioned as 2.000 +/- .5 is not the same
as 1.5 +/- .5.
IF it actually works you also have to account for a wider
actual tolerance band on one end and hence the tolerance
you must show/declare must be *smaller* than what
would really work *if about the geometric nominal*.

Consider (functional) 1.375 +/- .010 ==> [1.385/1.365].
You'd get away with (on the drawing) 1.38 +/- .005 ==> [1.385/1.375].
See? The +/- .010 is better for manufacturing they claim ...
and the +/- .005 costs more.

 

Dimension & tolerance everything to 4 places (symmetric +/- or limit)
with your most common tolerance *for the job* then go back
& select the tolerances you wish to change in batches.
Used to work nice & fast on CV <G>. Looked good too.
The DIMENSION PART command was great too IF you knew
how to use it (few did).

 

Easier to remove later than to add, eh?

 

<Sheesh>
Use the general tolerance note to specify +/- .005 UOS and only
show the other tolerances in the one place needed (otherwise stated)
but still dimension all to 3 or 4 decimal places. They just don't need
other tolerances added as the note (UOS) covers that.

These things are to help you & everybody else.