OrcaSlicer Can’t Connect to OctoPrint: Every Fix That Works
Hitting 401, 403, or Connection Refused when OrcaSlicer talks to OctoPrint? A flowchart of every fix, ordered by how often it actually works, from the wrong port to the wrong reverse proxy.
Jake Holloway
OrcaSlicer Nightly vs Stable: Which Should You Use in 2026?
Honest breakdown of OrcaSlicer nightly vs stable in 2026: what each channel is, what nightly buys you today, the profile-folder gotcha, and clean rollback.
OrcaSlicer Custom G-code: Start, End and Layer-Change Macros
Source-cited guide to OrcaSlicer custom G-code: all 15 hooks, bracket vs brace placeholder syntax, plus Marlin, Klipper, and Bambu start macro patterns.
OrcaSlicer with Bambu Cloud and LAN-Only Mode: A Complete 2026 Setup
OrcaSlicer plus Bambu in 2026 means LAN-Only mode and Developer Mode, not Cloud. Here is why the rules changed after Bambu Authorization Control and how to set it up cleanly.
OrcaSlicer Cooling and Fan Curves Explained (2.3.x Guide)
Every OrcaSlicer cooling setting, verified per-filament fan defaults from the source JSON, overhang and bridge tuning, aux fan, and fixes for warping.
How to Connect OrcaSlicer to OctoPrint: IP, API Key, and the Common Errors
Set up OrcaSlicer to send G-code directly to OctoPrint on your Raspberry Pi. Application Keys, IP and mDNS, the 403 vs 401 gotcha, and which printers actually belong on OctoPrint in 2026.
OrcaSlicer By Object vs By Layer: Picking the Right Print Sequence
OrcaSlicer By Object vs By Layer: gantry clearance, AMS lockouts, failure isolation, the tallest-object trap, and a checklist for picking the right mode.
How to Connect OrcaSlicer to Klipper (Mainsail and Fluidd): The 2026 Setup
Connect OrcaSlicer to your Klipper printer in five minutes. The trick most tutorials miss is the difference between Hostname and Device UI, and getting it right is what makes Test Connection finally go green.
OrcaSlicer Modifier Meshes: Different Settings on One Model
Override infill, walls, speeds, and supports inside any region of a print with OrcaSlicer modifier meshes. Full guide with worked examples and gotchas.
OrcaSlicer Spiral Vase Mode: Single-Wall Vases Done Right
A complete guide to OrcaSlicer spiral vase mode: the spiral_mode setting, the four sub-settings, model rules, force-disabled features, and full fixes.