Overview

You may see the FieldPrinter complete a print and report success, but no visible ink appears on the floor. This can be confusing in the field.

This behavior is expected in certain situations. The robot software confirms that it executed the print command, not that ink was successfully deposited.

Understanding this distinction helps you troubleshoot quickly and avoid unnecessary resets or replacements.

What You’ll See in the Field

• Robot completes path normally and moves exactly as expected
• Dusty App shows “Print completed” with no errors
• No visible ink lines on the surface
• No alerts or warnings related to printing

Why This Happens

• Software confirms execution, not outcome The robot software verifies that it followed the path and activated the printheads
• No direct ink flow feedback The system does not detect whether ink actually exited the cartridge
• Separated system responsibilities The robot controls motion and timing, while the cartridge handles ink delivery
• Silent ink failures are possible Empty cartridges, clogs, or environmental issues can prevent ink flow without triggering an error

The system is designed to ensure accurate movement and command execution, not visual confirmation of printed results.

How the System Works

The FieldPrinter performs three key actions during printing:

1. Moves along the planned layout path
2. Activates the printheads at the correct time
3. Completes the motion without system errors

Once these steps are completed, the system reports the print as successful.

The robot does not verify whether a visible mark was created on the surface. 

How to Troubleshoot

Follow these steps in order to identify and resolve the issue.

1. Check Ink Cartridge Levels
   • Remove and inspect cartridges
   • Replace any that are empty or nearly empty
2. Inspect for Clogs
   • Look for dried ink or buildup on the nozzles
   • Swap cartridges to isolate the issue if needed
3. Clean Nozzles
   • Use an alcohol wipe on the nozzles
   • Press down on the nozzles with your thumb for at least 20 seconds
   • Shake or flick the cartridge to help clear dried ink
   • Wipe again to remove residue
   • Reinstall and test
4. Verify Ink Type vs. Conditions
   • Water-based ink performs best on dry surfaces
   • Solvent-based ink performs better in colder or slightly moist conditions
5. Check Surface Condition
   • Ensure the floor is clean and dry
   • Remove dust, moisture, or coatings that may prevent adhesion
6. Run a Test Print
   • Print a short line in an open area
   • Confirm consistent ink output
7. Confirm Cartridge Installation
   • Ensure cartridges are fully seated
   • Reseat if necessary

Best Practices

• Verify ink before large prints Run a quick test line at the start of each session
• Match ink to environment Use the correct ink type for temperature and surface conditions
• Store cartridges properly Avoid extreme temperatures that affect ink flow
• Print regularly Helps prevent ink from drying and clogging the printhead