How to Generate Gerber Files from Target 3001!: Complete PCB Export Guide

Understanding Target 3001! and Its Gerber Capabilities

Target 3001! was developed by Ing.-Büro Friedrich in Germany and has been available since 1992. Unlike many PCB tools that treat Gerber export as an afterthought, Target 3001! offers sophisticated output options including support for the latest Gerber X2 and Gerber X3 formats alongside traditional RS-274X.

The software creates what developers call a “do it all” Gerber format—files that work with both older RS-274D interpreters and modern RS-274X systems. This backward compatibility proves valuable when working with various manufacturers who may have different CAM software capabilities.

Target 3001! Version Comparison for Gerber Features

Edition	Pin Limit	Copper Layers	Gerber Output	Price
Free	250	2	Limited	Free
Light	400	2	Full RS-274X	Paid
Smart	700	4	Full RS-274X/X2	Paid
Medium	1500	4	Full RS-274X/X2/X3	Paid
Professional	4000	8	Full with all options	Paid
Design Station	Unlimited	16	Full enterprise features	Paid

The free version handles basic Gerber generation for small projects, while commercial versions unlock advanced features like Gerber X3 output with component assembly information.

Prerequisites Before Generating Gerber Files in Target 3001!

Before jumping into the export process, complete these essential preparation steps to ensure your manufacturing files come out correctly.

Run Design Rule Check

Target 3001! includes comprehensive DRC functionality accessible through the Actions menu. Run this check to identify spacing violations, unconnected nets, and other issues that could cause manufacturing problems. Fix all errors before generating Gerber files—manufacturers will either reject files with obvious problems or charge extra for manual corrections.

Verify Layer Stack Configuration

Target 3001! uses a specific layer numbering system that differs from other PCB software. Understanding this mapping prevents confusion when configuring Gerber output:

Target 3001! Layer	Function	Gerber Extension
Layer 2	Copper Bottom	.BOT or .GBL
Layer 16	Copper Top	.TOP or .GTL
Layer 3	Area Bottom (Ground Plane)	Included in bottom copper
Layer 15	Area Top (Ground Plane)	Included in top copper
Layer 4	Deletion Bottom	Cutouts from bottom plane
Layer 14	Deletion Top	Cutouts from top plane
Layer 6	Solder Stop Bottom	.GBS
Layer 7	Solder Stop Top	.GTS
Layer 21	Position Print Bottom	.GBO
Layer 22	Position Print Top	.GTO
Layer 24	Drill Holes	.DRL or .DRILL
Layer 23	Board Outline	.OUTLINE or .GKO

The copper layers in Target 3001! always consist of three combined layers: the actual copper layer, an area layer for planes, and a deletion layer for plane cutouts. The software automatically merges these during Gerber export.

Check Board Outline Definition

Your board outline must be properly defined on Layer 23. Without a clear outline, manufacturers cannot determine board dimensions or where to route individual panels. Verify the outline forms a completely closed path with no gaps.

Step-by-Step Guide to Generate Gerber Files from Target 3001!

The actual Gerber generation process in Target 3001! follows a logical workflow once you know where to find the commands.

Step 1: Access the Gerber Output Dialog

Navigate to the Gerber export function using one of these methods:

• Menu Path: File → Input/Output Formats → Production → (X-)Gerber and Drill Output PCBout
• Keyboard Shortcut: Press F11 directly
• Toolbar: Click the Gerber output icon in the top toolbar (when in PCB view)

The main Gerber output dialog appears, showing layer selections and configuration options.

Step 2: Configure Basic Output Settings

The standard dialog presents essential options for most users:

Output Directory: By default, Target 3001! creates Gerber files in your project directory. Consider creating a dedicated subdirectory to keep manufacturing files organized separately from your design files.

Layer Selection: Check the boxes for each layer you want to export. For a standard two-layer board, select:

• Copper Top
• Copper Bottom
• Solder Stop Top (solder mask)
• Solder Stop Bottom (solder mask)
• Position Print Top (silkscreen)
• Position Print Bottom (silkscreen)
• Board Outline
• Drill Holes

File Naming: Target 3001! offers multiple naming conventions. Click the “Standard” button to use internationally recognized file extensions, or customize names using the “TARGET” button for legacy compatibility.

Step 3: Access Advanced Settings (Special Dialog)

For additional control, click the “Special >>” button below the Start button. This expands the dialog to reveal advanced configuration options:

Smallest Aperture: Enter the minimum aperture size your manufacturer can handle. Typically 0.15mm (6 mil) works for most fabricators. Tracks thinner than this value get automatically widened during export—Target 3001! warns you if this causes spacing violations.

Maximum Chord Error: Controls how circles and curves get approximated with straight line segments. Lower values create smoother curves but larger file sizes. A value of 0.01mm works well for most applications.

Polygon Fill Method: Choose how copper pours get represented in Gerber:

• Fill with thin lines only (most compatible, largest files)
• Standard polygon fill (recommended for most cases)
• Advanced polygon handling (for complex designs)

Via Coverage: Configure whether vias should be covered with solder mask, left open, or have only the drill hole exposed. This setting affects the solder stop layer generation.

Step 4: Configure Gerber Format Options

Target 3001! supports multiple Gerber format variations:

Format Option	Description	When to Use
RS-274X (XGerber)	Extended format with embedded apertures	Default for most manufacturers
RS-274D Compatible	Legacy format with separate aperture files	Older CAM systems only
Gerber X2	Extended with layer function metadata	Modern manufacturers
Gerber X3	Includes assembly and component data	Automated assembly services

For maximum compatibility, keep the default RS-274X format. Enable Gerber X2 attributes if your manufacturer supports them—this reduces the chance of layer misidentification during CAM processing.

Step 5: Generate the Files

Click the “Start” button to initiate Gerber generation. Target 3001! processes each selected layer and creates individual files in your specified output directory.

Upon completion, the software generates an information file (*.info) containing project details, layer mapping, and any warnings encountered during generation. Review this file before sending data to your manufacturer.

Step 6: Generate Drill Files

Drill file generation happens as part of the standard Gerber output process in Target 3001!. The software creates Excellon-format drill files automatically when you include Layer 24 (Drill Holes) in your selection.

The drill file includes:

• Tool definitions with diameter specifications
• Hole coordinates in the same units as your Gerber files
• Plated and non-plated hole designations (if properly defined in your design)

Target 3001! Gerber File Extensions and Naming

Target 3001! generates files with specific extensions. Understanding these helps when organizing data for manufacturers:

File Extension	Content	Notes
*.TOP	Top copper layer	Primary signal layer
*.BOT	Bottom copper layer	Secondary signal layer
*.StopTop	Top solder mask	Defines mask openings
*.StopBot	Bottom solder mask	Defines mask openings
*.PosiTop	Top silkscreen	Component markings
*.PosiBot	Bottom silkscreen	Secondary markings
*.Outline	Board outline	Routing/cutting path
*.Drill	Excellon drill data	Hole positions and sizes
*.Apr	Aperture list	Tool definitions
*.Tool	Drill tool list	Drill bit specifications
*.Whl	Aperture list (Eagle format)	For compatibility
*.info	Project information	Layer mapping and notes
*.X3B	Gerber X3 bottom assembly	Component placement data
*.X3T	Gerber X3 top assembly	Component placement data

When using the “Standard” naming option, Target 3001! generates files with more universally recognized extensions like .GTL, .GBL, .GTS, .GBS, etc.

Verifying Gerber Output from Target 3001!

Never send Gerber files to a manufacturer without verification. Target 3001! is not a Gerber viewer, so you need external tools to check your output.

Recommended Gerber Viewers

Viewer	Platform	Cost	Key Features
GC-Prevue	Windows	Free	Industry standard, comprehensive
Gerbv	Windows, Linux, Mac	Free	Open source, lightweight
ViewMate	Windows	Free	Professional grade
GerberLogix	Windows	Free	Advanced measurement tools
Online viewers (JLCPCB, PCBWay)	Web	Free	Quick verification before ordering

Verification Checklist

When inspecting your Gerber files, check these critical items:

Layer Alignment: Stack all layers in the viewer and confirm perfect registration. Pads on different layers must align exactly.

Drill Centering: Verify drill holes center precisely on pads. Misalignment indicates coordinate system problems.

Copper Plane Integrity: Check that ground planes and poured copper areas render correctly without gaps or artifacts.

Solder Mask Clearances: Ensure mask openings properly expose pads while protecting traces.

Silkscreen Placement: Verify text and component outlines don’t overlap solder mask openings.

Board Outline: Confirm the outline forms a continuous closed path at the correct dimensions.

Troubleshooting Common Gerber Export Issues in Target 3001!

Even experienced users encounter problems occasionally. Here are solutions to frequent issues:

Problem: Copper Planes Display Incorrectly

If ground planes or power planes don’t export properly, check your polygon fill settings in the Special dialog. Try switching between fill methods. Also verify that your area layers (3 and 15) and deletion layers (4 and 14) are correctly configured.

Problem: Drill Holes Offset from Pads

This usually indicates a coordinate system mismatch. Ensure your Gerber and drill files use the same units (metric or imperial) and zero reference point. The info file lists the exact settings used—compare these if problems arise.

Problem: File Size Extremely Large

Large Gerber files typically result from complex copper pours being filled with many thin lines instead of using polygon commands. Adjust the polygon fill method in Special settings. Also check the chord error setting—very small values create unnecessary detail.

Problem: Manufacturer Reports Missing Layers

Target 3001!’s default file naming may confuse some manufacturers. Use the “Standard” naming option for international compatibility, or provide a README file explaining your layer mapping.

Problem: Aperture Warnings During Export

If Target 3001! reports aperture issues, some design elements may be smaller than your specified minimum aperture. Review the warnings carefully and either adjust your design or accept the automatic widening.

Best Practices for Target 3001! Gerber Generation

After producing countless boards from Target 3001! designs, these practices consistently prevent problems:

Use Standard Layer Assignments

Stick with Target 3001!’s default layer numbering scheme. Creative layer reassignment causes confusion during export and verification. Document any deviations clearly.

Configure Solder Mask Expansion Correctly

In Target 3001!, the solder mask expansion (called “Soldermask +” in settings) controls how much larger mask openings are compared to pads. A value of 0.050mm (50 microns) provides adequate clearance without creating solder bridges on fine-pitch components.

Include All Necessary Files

A complete manufacturing package from Target 3001! should include:

• All copper layer Gerbers
• Both solder mask layers
• Both silkscreen layers (if used)
• Board outline
• Drill file with tool list
• The info file for reference

Create a Subdirectory for Output

Rather than cluttering your project folder, configure Target 3001! to place Gerber files in a dedicated subdirectory. This keeps files organized and makes packaging for manufacturers easier.

Useful Resources for Target 3001! Users

Here are essential links for anyone working with Target 3001! and Gerber files:

Resource	URL	Description
Target 3001! Official Site	www.ibfriedrich.com	Software download and documentation
Target 3001! Wiki	server.ibfriedrich.com/wiki	Comprehensive tutorials and guides
PCB-Pool (Beta Layout)	us.beta-layout.com	Manufacturer accepting Target files directly
Multi-CB Target Guide	www.multi-circuit-boards.eu/en/support/pcb-data/target-3001.html	Manufacturer-specific instructions
Gerbv Viewer	gerbv.github.io	Free open-source Gerber viewer
GC-Prevue	Available from manufacturers	Professional Gerber verification
Target 3001! Crash Course	IBFriedrich website	Beginner tutorials
SnapEDA Components	www.snapeda.com	Additional component libraries

Sending Target 3001! Files Directly to Manufacturers

Meta:Master Target 3001! Gerber export with detailed instructions for RS-274X, Gerber X2, and X3 formats. Includes layer mapping, verification steps, and best practices.

Some PCB manufacturers accept native Target 3001! project files (*.T3001) directly, handling the Gerber conversion themselves. This can simplify your workflow:

Manufacturers Accepting Target 3001! Files

Manufacturer	Direct File Support	Notes
PCB-Pool (Beta Layout)	Yes	Integrated ordering from software
Multi-CB	Yes	Free conversion service
Conrad Electronic	Yes	Partnership with Target 3001!

If using direct file submission, ensure your design passes DRC and follows the manufacturer’s design rules. The manufacturer’s CAM engineers will generate optimized Gerber files from your project.

Comparing Target 3001! Gerber Output to Other Software

Understanding how Target 3001! compares helps when collaborating with users of other tools:

Feature	Target 3001!	KiCad	Altium	Eagle
Gerber RS-274X	Yes	Yes	Yes	Yes
Gerber X2	Yes	Yes	Yes	Limited
Gerber X3	Yes	No	Yes	No
Embedded Apertures	Yes	Yes	Yes	Yes
Excellon Drill	Yes	Yes	Yes	Yes
Polygon Fill Options	Multiple	Limited	Multiple	Limited
Built-in Verification	No (external)	No	Yes	No

Target 3001! stands out with its Gerber X3 support and flexible polygon handling options, though it lacks built-in Gerber viewing capabilities.

Frequently Asked Questions

What Gerber format does Target 3001! generate by default?

Target 3001! generates RS-274X (Extended Gerber) format by default, which includes embedded aperture definitions. The software creates files that are backward compatible with older RS-274D systems by including aperture information as comments that legacy interpreters ignore. Modern systems read the embedded apertures directly, while older systems can use the separate aperture file (*.Apr) that Target 3001! also generates.

Can I generate Gerber X2 or X3 files in Target 3001!?

Yes, Target 3001! supports both Gerber X2 and Gerber X3 output. Enable these options in the Gerber output dialog by checking the appropriate boxes. Gerber X2 adds layer function attributes that help manufacturers identify each file’s purpose automatically. Gerber X3 extends this further by including component placement and assembly information, useful for automated pick-and-place programming.

Why do my copper planes look different in the Gerber viewer than in Target 3001!?

Target 3001! displays copper planes differently than Gerber viewers because the software shows design intent while Gerber files show actual manufacturing data. Copper pours get converted to filled polygons or vector fills during export, which can appear different visually. Verify the actual copper coverage is correct—minor visual differences between the design view and Gerber representation are normal and don’t affect manufacturing.

How do I include pick-and-place data with my Gerber files?

Target 3001! can export centroid (pick-and-place) files along with Gerber data. In the Gerber output dialog, ensure the pick-and-place option is enabled. The software generates files containing component positions, rotations, and designators that assembly houses use for automated placement. For Gerber X3 output, this information gets embedded directly in the *.X3T and *.X3B files.

What resolution does Target 3001! use for Gerber output?

Target 3001! generates Gerber files with extremely high resolution: 0.000254mm (0.01 mil), expressed as format %FSLAX35Y35*% in the file header. This resolution far exceeds what any manufacturer can actually produce and ensures no loss of precision during data transfer. The high resolution accommodates future improvements in manufacturing technology without requiring file format changes.

Final Thoughts on Target 3001! Gerber Generation

Target 3001! offers one of the more sophisticated Gerber export systems available in PCB design software, particularly with its support for the latest Gerber X2 and X3 formats. The unified approach to schematic capture, simulation, and layout means your design data remains consistent throughout the process, reducing the chance of errors that plague multi-tool workflows.

The key to success lies in understanding Target 3001!’s unique layer structure and taking time to properly configure export settings. The Special dialog options give you fine control over how your design translates to manufacturing data, but the defaults work well for most standard projects.

Always verify your output using an independent Gerber viewer before submitting to manufacturers. This simple step catches problems that could result in expensive board respins. With proper preparation and verification, Target 3001! produces manufacturing files that any competent PCB fabricator can process successfully.

Whether you’re a hobbyist using the free version or a professional with a full Design Station license, mastering the Gerber export process transforms Target 3001! from a design tool into a complete PCB development solution.