Sending a 3D print by SD card exports G-code to a card or USB and starts the job from the printer's onscreen menu; network sending transmits over Wi-Fi or LAN via the slicer or a host like OctoPrint or Klipper. Network send adds monitoring; SD card needs no network. 🖨️
Two paths get a sliced model from your computer to your 3D printer, and they behave nothing alike once you understand what each one is actually doing. Sending a print by SD card means the slicer writes a G-code file to a card or USB stick, you carry it to the machine, and the printer reads instructions straight off the storage. Network sending pushes that same G-code over Wi-Fi or LAN, usually through a host like OctoPrint or Klipper, so the file never leaves your desk physically.
SD card needs zero network setup and is the most reliable way to run a long print, because the printer reads from local storage and a dropped Wi-Fi signal cannot interrupt it. Network sending costs you a host (a Raspberry Pi running OctoPrint, or Klipper) but gives live monitoring, remote start, and a webcam feed. Pick SD for reliability on a single machine, network for convenience and oversight.
Your slicer (Cura, PrusaSlicer, OrcaSlicer) turns the 3D model into G-code, the plain-text list of movements and temperatures the printer follows line by line. Export that file to a microSD card or USB drive, insert it into the printer, and select the file from the onscreen menu.
The printer's mainboard reads each command in sequence directly off the card. Nothing depends on your PC after the export, so you can shut the computer down mid-print. This is why SD remains the default on most entry and mid-range machines: it is simple, and it removes every network variable from a job that might run twelve hours.
The one habit worth keeping is ejecting the card cleanly from your PC and naming files clearly. A corrupted card or a half-written file is the most common cause of a print that stalls partway up.
Network sending transmits the G-code over your home network instead of moving a card around. There are two common routes.
OctoPrint is a free, open-source host that usually runs on a Raspberry Pi (the prebuilt image is called OctoPi). You connect the Pi to the printer over USB, then open OctoPrint in a browser from any device on your network. From there you upload the G-code, start the job, watch a live webcam stream, and pause or cancel remotely. OctoPrint streams commands to the printer over serial in real time, so the Pi has to stay powered for the whole print.
Klipper splits the work differently. It runs the heavy motion calculations on a host computer (again, often a Pi) and feeds the mainboard precise timing, which can unlock faster, smoother movement on capable hardware. Klipper pairs with web frontends like Mainsail or Fluidd for uploads and monitoring. Setup is more involved than OctoPrint, but the payoff is performance tuning that SD-only workflows cannot match.
Bambu Lab machines bake network send into their own ecosystem: the slicer talks to the printer over Wi-Fi or LAN directly, with cloud or local-only modes, so you get monitoring without building a separate host.
For a single printer in the same room where you work, SD card is hard to beat. It is reliable, free, and immune to network hiccups. For a printer in a garage, a spare room, or a flat where you want to glance at progress from your phone, a network host earns its keep fast. If you run more than one machine, network management saves real time. A small Pi and a webcam, plus mounting hardware and a power supply you can pick up from the broader accessories range stocked at Evetech, turn a basic printer into something you supervise from anywhere on your network.
A practical middle ground many makers use: network send for starting and monitoring, with the printer still able to fall back to SD if the host ever goes down.
SD card, in most cases. The printer reads from local storage, so a Wi-Fi drop or a host crash cannot interrupt a job already in progress. Network hosts are reliable too, but they add components that can fail.
For OctoPrint or Klipper, yes, a small single-board computer like a Raspberry Pi is the standard host. Printers with built-in Wi-Fi, such as Bambu Lab models, handle network send themselves and need no extra hardware.
Only at the machine itself, unless you add a separate webcam and host. SD card sending has no remote feed of its own. Adding OctoPrint to an SD-capable printer gives you both options.
No. With OctoPrint the printer still moves at the speed set in your G-code. Klipper can actually improve motion smoothness by offloading calculations to the host.
G-code, generated by your slicer for your specific printer profile. Both SD and network methods send the same G-code; only the delivery differs.
Ready to start printing or upgrade your setup? Browse the current 3D printer lineup and supporting gear at Evetech, including the full range of 3D printers in stock, and pick the workflow that suits your space.
SD card, in most cases. The printer reads from local storage, so a Wi-Fi drop or a host crash cannot interrupt a job already in progress. Network hosts are reliable too, but they add components that can fail.
For OctoPrint or Klipper, yes, a small single-board computer like a Raspberry Pi is the standard host. Printers with built-in Wi-Fi, such as Bambu Lab models, handle network send themselves and need no extra hardware.
Only at the machine itself, unless you add a separate webcam and host. SD card sending has no remote feed of its own. Adding OctoPrint to an SD-capable printer gives you both options.
No. With OctoPrint the printer still moves at the speed set in your G-code. Klipper can actually improve motion smoothness by offloading calculations to the host.
G-code, generated by your slicer for your specific printer profile. Both SD and network methods send the same G-code; only the delivery differs.
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