Problem

After using the Dusty AutoCAD plug-in to pre-process a layout file for the FieldPrint Platform, the dimensions in the drawing no longer match the original model or expected measurements in the field.

Cause

This issue typically occurs when:

1. Drawing units or coordinate systems are misaligned before export.
   • The plug-in reads coordinate scaling from the DWG file. If the file units are set to unitless or decimal, dimensions can appear distorted after processing.
2. The drawing’s origin or reference point was shifted during pre-processing.
   • Using the “Align to Survey” or “Move to 0,0” functions without verifying control point alignment can change relative distances.
3. Multiple coordinate systems (e.g., shared vs. project base point) were mixed between linked files.
   • This is common in projects using Revit-to-AutoCAD workflows or when multiple XREFs have different base points.

These conditions were identified in prior support cases where Dusty support resolved the issue by editing the DWG file and re-exporting points with proper Y,X coordinates.

Solution

Step 1: Verify Drawing Units

1. In AutoCAD, type UNITS in the command line.
2. Set Type to Architectural and Insertion Scale to Inches, and ensure your file units match the same in a 1:1 scale if it's been drafted in feet or mm. Changing the units only changes how the dimensions are measured; they dont automatically scale across unit changes mentioned in this window. ( Note - our system currently only supports inches as a unit of measurement. )
3. Re-run the Dusty plug-in pre-process.

Step 2: Confirm Coordinate Alignment

1. Turn on both Model and Layout base points if using Revit-derived DWGs.
2. Check that the project base point aligns with the surveyed control points used in the field.
3. If coordinates appear shifted, move the drawing back to the correct origin using MOVE and re-align with your control grid.

Step 3: Re-Export the File Using Correct Settings

1. In the Dusty plug-in ribbon, select Pre-Process Layout.
2. When prompted, verify:
   • The coordinate system is consistent with the control CSV (e.g., both in inches).
   • The “Apply Dusty Standards” checkbox is selected to ensure layer scaling consistency.
3. Save and re-publish to the Dusty Portal.

Step 4: Validate Before Printing

1. Open the file in the Dusty Portal.
2. Use the Preview to confirm dimension fidelity.
3. On-site, print a test square (e.g., 24” x 24”) and measure to ensure real-world accuracy.
    

Preventive Tips

• Always set units explicitly before using the plug-in. Don’t use “Unitless.”
• When updating control points, delete any previous CSVs before re-publishing the file to the Portal.
• Lock all control points in the Dusty app UI before printing to maintain consistent scaling.