Printer Connection Setup
Connection settings are saved per printer. Open 3D Printer, find the printer card, choose Settings, then use Connection to pick firmware, transport, host, and reconnect behavior.
- Apply a printer preset if one matches the machine.
- Choose the board firmware.
- Choose Network or USB transport.
- Fill the required host, password, or serial fields.
- Run Test Connection.
- Use Connect only after the test succeeds.
Presets patch common defaults such as board type, baud rate, build volume, and kinematics. They do not save or connect automatically.
Use Custom when you want to leave existing values unchanged.
The board type controls which API and object model Cindr3D expects.
Supported paths include Duet/RRF, Klipper, Marlin, Smoothieware, grbl, Repetier, and generic G-code transport. Choosing the wrong firmware type is the most common setup mistake.
For network mode, enter the hostname or IP without extra path text. Use a raw IP address when .local names are unreliable.
Examples:
192.168.1.100myprinter.localklipper.home
Duet/RRF printers have an extra mode selector.
Standalone means the Duet board serves HTTP/WebSocket directly. SBC means Duet Software Framework runs on a Raspberry Pi or similar board connected to the Duet.
USB mode uses Web Serial from a Chromium browser over HTTPS or localhost.
Requirements:
- Chrome, Edge, Brave, Arc, or another Chromium browser.
- A real USB data cable.
- The correct baud rate for the firmware.
- No other application currently holding the serial port.
USB is useful for direct G-code transport, but network mode is required for richer file listings, object models, graphs, height maps, and firmware-specific dashboards.
For the deeper serial workflow, see USB Connection (Web Serial).
Always run Test Connection first. It verifies host, firmware type, and password without opening the persistent live session.
Common failures:
- Connection refused: wrong IP/host, printer off, or service not running.
- Unauthorized: wrong password or token.
- Timeout: network route, firewall, Wi-Fi, or printer service issue.
- Garbled USB output: wrong baud rate.
Auto-reconnect can retry dropped network or USB sessions after the connection settings are known-good.
Leave it off during first setup so connection errors stay obvious. Enable it once testing is stable, then tune retry interval and max retries to match the workshop network.