3-TIERED INBOX: 3D & 2D CNC-READY FILES

Three-Tiered In-Box CNC File Preparation
Please read these instructions carefully. Your task is to convert the provided "Three-Tiered In-Box.pdf" woodworking plans into digital files suitable for CNC machining with Vectric VCarve Pro.

MANDATORY!!!!:
Read and Understand Before Bidding
You must meticulously read and fully understand every detail in these instructions, and thoroughly review the attached "Three-Tiered In-Box.pdf" file, before submitting your bid.

Your bid should encompass the complete and accurate cost for delivering all specified requirements: creating both 2D DXF and 3D STL/STEP files for every identified part, precisely adhering to all features, dimensions, and complexities outlined.

The price you bid for this project will be FIXED. Once the project is awarded, no additional payment will be considered or approved based on a later realization that the scope of work was more extensive than anticipated. By bidding, you confirm your full understanding of the project's requirements and your agreement to complete all tasks for your submitted price.

Part 1: General Requirements
Software: Use CAD software that can accurately extract 2D geometry and create 3D models (e.g., Fusion 360, SolidWorks, AutoCAD, SketchUp Pro).
Units: All dimensions in the PDF are in Imperial (inches). Please work strictly in inches.
File Formats:
For 2D outlines of each part: .dxf (DXF) files. These files must be CNC ready, meaning clean geometry suitable for direct toolpath creation in Vectric VCarve Pro.
For 3D models of each part: .stl (STL) or .step (STEP) files. These files must also be CNC ready, featuring watertight solids with correct surface normals for 3D machining in VCarve Pro.
A master assembly file showing all parts together (optional, but helpful for review): native CAD format, or a single .stl or .step of the full assembly.
Naming Convention: Name files clearly.
Example: Frame_Upright_Left.dxf, Frame_Upright_Left.stl, Tray_Side_Sliding.dxf, Tray_Bottom.stl.
Use the part names exactly as they appear in the PDF if possible (e.g., "SLIDING TRAY SIDE," "FRAME UPRIGHTS").
Accuracy and Scale: All dimensions, angles, and curves must precisely match the PDF plans. All models MUST be to scale (1:1 scale, real-world size).
Part 2: 2D File Extraction (DXF) - CNC Ready Geometry and Scale
For each unique wooden part shown in the PDF, create a separate 2D DXF file. These DXF files must be perfectly prepared for CNC machining.

Open the PDF: Use a PDF viewer or editor (like Adobe Illustrator, Inkscape, or your CAD software's PDF import function) to access the drawings.
Extract Outlines:
Trace or extract the outermost perimeter of each part.
Include all internal cutouts, holes, grooves, and notches.
Crucially, exclude: Dimension lines, text labels, hidden lines (dashed lines indicating features on the opposite side), and assembly lines (like the "SECTION A-A" line).
Focus only on the lines that define the physical shape of the wood part.
Scale: Ensure the extracted 2D drawing is at a 1:1 scale (real-world size). Double-check a known dimension (like the 13" length of a sliding tray side) to confirm correct scaling.
Clean Geometry (CNC Ready):
No overlapping or duplicate vectors. All lines should be single, continuous paths where appropriate.
No open vectors. All closed shapes must truly be closed.
Minimal nodes/control points. Geometry should be smooth and efficient, avoiding excessive points that can complicate toolpath generation.
Optimized for machining. Consider vector direction and start points if your CAD software allows for this optimization, though VCarve Pro can often handle this.
Origin Point: For each DXF, place the bottom-left corner of the part at the origin (X=0, Y=0).
Save: Save each part as a separate .dxf file, ensuring compatibility with general CAD/CAM software (e.g., AutoCAD 2000 DXF or newer).
Example parts for DXF extraction:

Page 1/4 (Isometric and Section Views):
Main "U-shaped" frame (appears as two uprights and two connectors)
Top tray (fixed)
Middle tray (sliding)
Bottom tray (sliding)
Page 2/4 (Exploded View):
E (Frame upright)
F (Frame upright)
A (Frame bottom connector)
D (Sliding tray assembly)
G (Cherry splines for frame)
H (Tray guides for lower trays)
Page 3/4 (Tray Details):
SLIDING TRAY SIDE (There are two unique sides for each sliding tray, pay attention to the groove and spline features for left/right)
FIXED TOP TRAY SIDE
TRAY FRONT
TRAY BOTTOM (1/4" plywood)
TRAY SPLINE
Page 4/4 (Frame Details):
TRAY GUIDE
FRAME TOP CONNECTOR
FRAME UPRIGHTS (Left and Right are symmetrical after the top splined miter, but need to be treated as unique for the guide screw holes)
FRAME BOTTOM CONNECTOR
Small cork pads (1/2" diameter) if they are to be cut by CNC.
Part 3: 3D Model Creation (STL or STEP) - CNC Ready Solids and Scale
For every unique wooden part, create a 3D model. These 3D models must be perfectly prepared for CNC machining and built to scale.

Extrude and Model:
Use the 2D DXF outlines as a base.
Extrude each 2D outline to its correct thickness. (e.g., most parts appear to be 1/2" thick, but confirm from the exploded view or measurements.)
Add all 3D features:
Grooves: For plywood bottoms (1/4" wide, 1/4" deep, 1/8" from bottom edge). These are in the SLIDING TRAY SIDE and FIXED TOP TRAY SIDE and TRAY FRONT.
Spline Slots: The intricate slots for the splines in the mitered corners.
Round-overs: The PDF specifies "1/2" round-overs" and "1/4" round-overs" on various edges (e.g., TRAY FRONT, SLIDING TRAY SIDE, FIXED TOP TRAY SIDE, FRAME TOP CONNECTOR, FRAME BOTTOM CONNECTOR). Apply these accurately.
Contoured Cutouts: The finger pulls on the TRAY FRONT parts.
Screw Holes: Include all screw holes for the TRAY GUIDE pieces. These are typically 5/32" diameter, countersunk (refer to "5/32" hole, countersunk" on page 4).
Miter Joints: Pay close attention to the 45-degree mitered ends on the tray sides and fronts, and the frame connectors.
Combine Features: The 3D model should represent the final, fully machined part, ready for assembly.
CNC Ready Solids and Scale:
Watertight Mesh (for STL) or Solid Body (for STEP): The 3D models must be solid throughout, with no missing faces, inverted normals, or internal self-intersections. This is crucial for successful toolpath generation in CAM software.
Optimal Tessellation (for STL): If providing STL files, ensure the mesh resolution is sufficiently high to accurately capture all curves and details without being excessively large, which can cause performance issues.
Correct Orientation: Orient the 3D model with the bottom surface of the physical part flat on the Z=0 plane (the machine's spoilboard in a typical CNC setup).
All 3D models must be built to scale (1:1 scale), reflecting real-world dimensions.
Save: Save each 3D part as a separate .stl or .step file.
Specific Details to Note from the Plans:

Trays:
All three trays are "matching" but the top one is fixed, and the bottom two slide. They all use similar SLIDING TRAY SIDE or FIXED TOP TRAY SIDE and TRAY FRONT pieces.
The TRAY BOTTOM is 1/4" plywood, 9-1/2" x 12-1/2".
The groove for the bottom is 1/4" wide, 1/4" deep, and 1/8" from the bottom edge in the sides and front of the trays.
The TRAY SPLINE (1/8" x 3/8" x 1") is crescent-shaped with a 7/8" radius, 1/4" thick. This is glued into the spline slots in the tray corners.
The TRAY FRONT has a specific cutout: flat 4" wide section, 1" deep, with R1/4 corners.
Frame:
The main "U-shaped" frame consists of two FRAME UPRIGHTS and two FRAME CONNECTORS (top and bottom).
The TOP FRAME SPLINE (1/8" x 3/4" x 3-1/4" initial size), shown with a final shape including a curve and a V-notch. This should be modeled as the final shape after glue-up and trimming.
The TRAY GUIDE (1/2" thick, 12-1/8" long, with specific end shapes as shown in detail on page 4). These are attached to the FRAME UPRIGHTS with #8 x 5/8" Brass FHWS (Flat Head Wood Screws) into 5/32" countersunk holes.
The FRAME UPRIGHTS have intricate spline slots at the top and bottom.
The FRAME TOP CONNECTOR and FRAME BOTTOM CONNECTOR also have these spline slots and are curved.
Note the R1/2 round-overs on the outside edges of the frame and trays.
Spline Jig: No need to model the spline jig itself, only the splines for the project.
Part 4: Final Check and Quality Assurance (QA)
Before delivery, please perform the following rigorous checks:

All parts accounted for? Every unique wooden component listed or visually represented in the PDF should have a 2D DXF and a 3D STL/STEP file.
Dimensions and Scale Correct? Compare critical dimensions from your models against the PDF plans. Use a known dimension on the PDF, such as overall width or height, to verify that your digital models are at a 1:1 scale and accurately reflect all measurements.
Features included? Are all grooves, holes, round-overs, spline slots, and other machining details present and accurate in the 3D models?

Correct file formats and naming?

Interference Check (Critical QA Step):

Assemble the 3D models digitally. In your CAD software, create a complete digital assembly of the entire Three-Tiered In-Box using all the individual 3D part models you've created.
Run an Interference Detection Analysis. Perform a full interference or clash detection analysis on the assembled model.
Identify and Resolve Issues. Any detected interferences (where two parts occupy the same space) must be resolved by precisely adjusting the relevant part models. There should be zero interference in the final assembled model, ensuring all parts fit together as intended by the plans, considering any necessary clearances (e.g., for sliding trays).
Document Clearance. Briefly report any intentional small clearances you have designed, such as the 1/16" clearance around the sliding trays mentioned in the PDF.
Thank you for your careful work on this project!