The Loop clearing method for AutoPrint

Loop is an open-source, DIY bed-clearing mod for the original Prusa MK3S+. It knocks finished parts off the bed so SimplyPrint can start the next print on its own, with no plate stack to refill. This guide covers what Loop does, how to select it as your AutoPrint clearing method, and how the cycle runs.

What Loop is

Loop is a community modification for the Prusa MK3S+, published as an open-source project on GitHub (SimplyPrint links to the project page from the method card). It is a build-it-yourself way to put a Prusa MK3S+ on autopilot. Rather than swapping plates, Loop clears the bed in place: the clearing sequence SimplyPrint runs raises and parks the toolhead, then homes the Y axis repeatedly to knock the finished part off the bed before the next print begins.

Because there are no plates to consume, Loop can run continuously for as long as there is matching work in the queue.

Selecting Loop on a printer

You set a clearing method per printer, from the AutoPrint settings.

1. Open the printer's control panel and find the AutoPrint widget.
2. Open the AutoPrint settings and find the Clearing method section.
3. Click the method selector and choose Loop Mod.
4. Save, then flip the AutoPrint switch on for the printer.

What SimplyPrint does each cycle

With Loop selected, each AutoPrint cycle runs like this:

1. The print finishes and SimplyPrint detects the completed state.
2. The bed cools to the temperature (or for the time) you set, so the part releases more easily.
3. SimplyPrint runs the Loop clearing sequence, which parks the toolhead and homes Y a few times to knock the part off the bed.
4. SimplyPrint verifies the bed is clear. With a camera connected, AI bed check can confirm visually before continuing.
5. SimplyPrint matches the next queue item and starts it, and the loop repeats.

For how matching, scheduling and verification work in detail, see the AutoPrint overview.

Building Loop

Loop is an open-source project, so there is nothing to buy from SimplyPrint. SimplyPrint links to the project's GitHub page from the clearing-method card, where you will find the parts list and build instructions.

Related articles

• AutoPrint: put your printers on autopilot - the feature Loop plugs into
• AutoPrint clearing methods: pick how the bed gets cleared - all the clearing methods, side by side
• The JobOx clearing method - a plate-swap mod that also supports Prusa printers
• The standard print-head push-off method - clearing the bed in place with the toolhead, no extra hardware

Updated on: 26/06/2026