Analysis Output > Statistical Analysis > Run Analysis > Monte Carlo Analysis

After a simulation, the measurement data can be saved in text or excel format in a separate file for later use.

For saving the Monte Carlo Analysis or Contributor Analysis results as HTML or JPEG files, please see Report Generation.

Default location: C:\Users\<username>\Documents\DCS\All Platforms\Results

Histogram
File Type	Description
Histogram (*.HST)	Saves all the statistical data from the Histogram.
Statistics Row (*.CSV)	Saves each measurement's statistical data.
Statistical Column (*.RSH)	Saves each measurements statistical data; shown exactly from the Histogram statistical list.
Raw Data (*.RAW)	Saves the measurement's Min and Max distance information.
CMM Deviation (*.DEV)	Saves the measurement deviation data with X,Y,Z measurement values.
QDM - DCSDB2 (*.CSV)	Saves the measurement deviation data with X,Y,Z and i,j,k and Diameter measurement values. This data can be used to import into QDM to create measurement charts.
Related List (*.REL)	Saves all the measurements information used in Related List.

Procedure:

•Switch to a specific measurement to save as Raw Data.

•Click on File Save Histogram. This activates the Save To dialog box.

SaveHistogram_RawData

File and Format Details

3DCS incorporates four methods of importing external variation data into the model.

CMM Dev file

If the data contains part by part deviations at multiples points, with each point measured along X, Y, and Z vectors and/or a Diameter, such as with CMM data, using the cmmdev.dll is the most efficient method.

Uses for the CMMDev file:

•Import deviations from the Simulation. Go to File -> Save Simulation as... and select CMM Deviation file (*.dev).

•Use as a template for creating User-Defined tolerances.

•Can be used to simulate Measure or Plant data. See the User-DLL called: CMMDev2.DLL

Format details of the CMMDev file:

Measure or Point name	/* 10
Upper/Lower Spec Limits	/* 11 0 UDL LDL
Nominal Coordinates	/* 12 0 NOMX NOMY NOMZ
Measure Direction	/* 13 0 DIRX DIRY DIRZ
Deviations	/* 20 INDEX DEVX DEVY DEVZ
Unit Names (“in”, “mm”, “cm”, “m”, ”ft”, “km”)	/* 30 UNIT

Notes:

•The delimiter used in the DEV file is [space].

•3DCS will only read lines with keys, such as */10, */11, */12, */13, */20, */30; other lines are ignored.

oLine 30 Unit can be applied multiple times

•The Dev file (.dev) format requires the measures to be in sets of three's, with names "pointname_X," "pointname_Y," and "pointname_Z, and pointname_D (Diameter)". Measures can be created quickly by using Measure Generator.

oXYZ and Diameter measures must be created with the same name and the same nominal XYZ and Diameter.

Example:

/* CODE LEGEND

/* 10 POINT/ MEASUREMENT NAME

/* 11 0 UDL LDL

/* 12 0 NOMX NOMY NOMZ NOMINALS

/* 13 0 DIRX DIRY DIRZ MEASUREMENT DIRECTION

/* 20 INDEX DEVX DEVY DEVZ DEVIATIONS

/* 30 LENGTH_UNIT i.e. MM, CM, M, KM, IN, FT (MM is assumed if key is not found)

/* key -1 val1 val2 val2 -- -1 means this line is useless

/* CMM DEV File; default extension = .dev

DATASET NAME = Product1

DATASET BUILD NAME =

DATASET PLANT NAME = (null)

DATASET PROCESS NAME = (null)

START DATE = (null)

END DATE = (null)

REPORT DATE = (null)

COMMENT 1 = (null)

COMMENT 2 = (null)

COMMENT 3 = (null)

30 IN

10 CadSurf2

11 0 +1,000000 -1,000000

12 0 +70,811335 +0,000000 +0,000000 +70,000000

13 -1 +1,000000 +0,000000 +0,000000

20 1 +0,000000 -0,036247 -0,183488 +0,133466

20 2 +0,000000 -0,408188 -0,142515 +0,006257

20 3 +0,000000 +0,094957 +0,016222 +0,012113

QDM - DCSDB2

The QDM DCSDB2 file exports the deviations of measured data with the USL/LSL, each point's i,j,k values and X,Y,Z deviations;

Uses for the QDM - DCSDB2 file:

•Import deviations from the Simulation. Go to File -> Save Monte Carlo as... and select QDM DCSDB2 (*.csv).

•Users can import a DCSDB2 file to create Coordinate points.

•Can be used to simulate Measure or Plant data. See the User-DLL called: CMMDev2.DLL

3. If the data contains the part by part deviations of a point along an oblique vector, creating a Linear Tolerance with a user-defined distribution is the most efficient method. The vector specified must be the same as the one used to measure the deviations, and the tolerance should be created relative to the same datums used to measure the parts.

4. If the data contains the mean shift and standard deviation of a point along a oblique vector, creating a Linear Tolerance with a normal distribution is the most efficient method. The vector specified must be the same as the one used to measure the deviations, and the tolerance should be created relative to the same datums used to measure the parts.

If both the deviations and the statistics of a point are known, the user must decide which to use. Using the deviations will preserve any unspecified relationships between points and, if varying the point along multiple vectors, between the vectors at a point. Using the statistical data will allow the variation to be extrapolated to its full range. The simulations will now consider builds throughout the range and thus have more predictive results.

Note:

3DCS requires the file to be saved as with the ANSI Encoding selected. If any other encoding is active, the file will not be converted correctly into 3DCS.

Saving Histogram Data

Saving Histogram Data

Note: