     ## 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. 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 0.010 off 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. Activate the Diameter symbol if Diameter True Position. 3. Fill in all the maximum and minimum dimensions from the drawing. This will calculate the mean basic dimensions for you. 4. Fill in the Actual X and Actual Y dimensions you measure on the part. 5. 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 circle with that radius around the basic point - which is twice the size. 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:  Link to older Android version 1.0.2: TruePos.apk version 1.0.3: TruePos103.apk Version 1.1.2: TruePos112.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. 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 0.010 off 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. Activate the Diameter symbol if Diameter True Position. 3. Fill in all the maximum and minimum dimensions from the drawing. This will calculate the mean basic dimensions for you. 4. Fill in the Actual X and Actual Y dimensions you measure on the part. 5. 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 circle with that radius around the basic point - which is twice the size. 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:  