Verify your installation

Step 5 of the Start here flow. Pick the test flow that matches your printer family.

Bambu A1 Mini and A1

Board self-tests on boot. Plug the AMS cable back in and watch the LED + hear each component cycle once.

Bambu P1P, P1S, P2S, X1C

Manual test triggered by a long press on the outer door button. Runs door → bender → fan in sequence.

Common prerequisites

Before running either test:

• The printer is powered off and the FarmLoop controller is wired per your assembly guide
• The latest firmware is flashed on the controller board, see Firmware
• The bender / pusher is mounted but keep the printer’s AMS disconnected for the very first power-on, just in case

Also check: the limit switch is fully seated

A common cause of “the component and activation tests work, but real prints sometimes miss a trigger” is a limit switch that isn’t fully seated in its holder. The switch body must sit flush in the slot - pressed all the way in, with no gap between the switch body and the holder. If it’s even slightly loose, vibrations and toolhead movement during a real print can shift it enough that the bender no longer reliably contacts it.

If the switch isn’t flush:

• Push it fully into the holder - a firm press down with your thumb is usually enough. The switch should bottom out in the slot.
• Reprint the holder with the newest revision if the slot is too loose or the switch won’t seat flush: download from the FarmLoop printable parts collection on MakerWorld. Newer revisions have tightened tolerances specifically to lock the switch in place.

After it passes

When the component test runs cleanly on your printer, move on to the Activation test print - that’s the first real G-code that exercises the full end-to-end flow including cool-down timing and actual eject.