True Position
Free software for calculating True Position. For Windows, Mac, IOS and Android. True position is the deviation from the theoretical location of the hole or feature as shown on the drawing. The tolerance is always shown in Diameter. A True Position of 0.000 would mean the hole is exactly where it is supposed to be. A True Position of 0.010 means the hole is 0.005 off radially from where it is supposed to be. If that 0.010 is more than the tolerance given on the drawing then the true position of the hole is out of tolerance.
True Position - Mobile
Utilities
You need to know the basic dimensions of the
drawing. This will calculate them for you.
1. Put in the Tolerance according to the drawing.
2. Fill in the Actual X and Actual Y dimensions you
measure on the part.
3. If Drawing Tolerance allows Maximum Material
Condition, activate the M symbol and fill in the
Actual Hole Diameter on the part.
0.2525-.01
0.2525+-.01
0.2525+.005-.007
Download True Position for iPhone, iPad, iPod Touch ios 7 or newer, at iTunes App store for free.
Calculation is automatically updated when you press Return on the keyboard or move to the next
editbox.
When True Position calculated result is in RED, the value is out of tolerance.
Maximum Material Condition - MMC
If the tolerance callout has the M symbol then you are allowed extra tolerance. This extra tolerance
comes from how much the actual size of the hole is larger than the minimum allowed size.
Short-Cut Method
For the short cut way, if you already know how much the hole is off in the X and Y direction, you
can just put the deviation from basic in the Actual X and Actual Y boxes along with the Tolerance,
and leave the Max and Min boxes blank. You can
MMC requires the min allowed diameter and the actual diameter of the hole.
Inch or Millimeter input doesn't matter as long as you use the same everywhere.
Radial or Diameter True Position.
Most tolerances on the drawings you see will have the diameter symbol in the feature control
frame. So .005 means the tolerance zone is a circle around the basic point with that diameter.
Without this symbol the .005 is a square with sides that distance around the basic point.
Plus and Minus Dimensions
For the hole diameter, you can also enter dimensions in the plus and minus form to make it easier
if your drawing has this kind of dimensioning. Using only the Dia Max edit box, after the main
number add plus and minus symbol or just plus or just minus and then the second number, into
the MAX dimension box. You can also have 0.2525+.01-.005 The min, max and mean are
automatically calculated from this. You can see the calculated mean dimensions in parentheses.
Examples for the hole size Max edit box:
Download True Position for Android devices: Download from Google Play here.
Link to older Android version 1.0.2: TruePos.apk
version 1.0.3: TruePos103.apk
Version 1.1.2: TruePos112.apk
Version 1.1.5 TruePos115.apk
True Position
Free software for calculating True Position. For Windows, Mac, IOS and Android. True position is the deviation from the theoretical location of the hole or feature as shown on the drawing. The tolerance is always shown in Diameter. A True Position of 0.000 would mean the hole is exactly where it is supposed to be. A True Position of 0.010 means the hole is 0.005 off radially from where it is supposed to be. If that 0.010 is more than the tolerance given on the drawing then the true position of the hole is out of tolerance.
True Position-Mobile
Utilities
You need to know the basic dimensions of
the drawing. This will calculate them for you.
1. Put in the Tolerance according to the
drawing.
2. Fill in the Actual X and Actual Y
dimensions you measure on the part.
3. If Drawing Tolerance allows Maximum
Material Condition, activate the M symbol
and fill in the Actual Hole Diameter on the
part.
Calculation is automatically updated when you
press Return on the keyboard or move to the next
editbox.
When True Position calculated result is in RED, the
value is out of tolerance.
Maximum Material Condition - MMC
If the tolerance callout has the M symbol then you
are allowed extra tolerance. This extra tolerance
comes from how much the actual size of the hole
is larger than the minimum allowed size.
Short-Cut Method
For the short cut way, if you already know how
much the hole is off in the X and Y direction, you
can just put the deviation from basic in the Actual
X and Actual Y boxes along with the Tolerance, and
leave the Max and Min boxes blank. You can
MMC requires the min allowed diameter and the
actual diameter of the hole.
Inch or Millimeter input doesn't matter as long as
you use the same everywhere.
Radial or Diameter True Position.
Most tolerances on the drawings you see will have
the diameter symbol in the feature control frame.
So .005 means the tolerance zone is a circle
around the basic point with that diameter.
Without this symbol the .005 is a square with sides
that distance around the basic point.
Plus and Minus Dimensions
For the hole diameter, you can also enter
dimensions in the plus and minus form to make it
easier if your drawing has this kind of
dimensioning. Using only the Dia Max edit box,
after the main number add plus and minus
symbol or just plus or just minus and then the
second number, into the MAX dimension box. You
can also have 0.2525+.01-.005 The min, max and
mean are automatically calculated from this. You
can see the calculated mean dimensions in
parentheses.
Examples for the hole size Max edit box:
0.2525-.01
0.2525+-.01
0.2525+.005-.007
Download True Position for iPhone, iPad, iPod
Touch ios 7 or newer, at iTunes App store for free.
Download True Position for Android devices:
Download from Google Play here.
Link to older Android version 1.0.2: TruePos.apk
version 1.0.3: TruePos103.apk
Version 1.1.2: TruePos112.apk
Version 1.1.5 TruePos115.apk