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Printing a project: Add to print queue, Start print and AutoPrint

Projects in SimplyPrint lets you print a project as one thing: you choose what to make and how many, and SimplyPrint uses the print files that fit the printer. This guide covers adding a project to the print queue, starting it on a printer, and how AutoPrint and the queue treat it.


Projects is included in the Print Farm and Enterprise plans. The print queue is part of the Pro plan and up.


This guide is part of the Projects documentation.


Table of contents


Where to start printing from

Add to print queue and Start print are offered in several places, and each queues something different:


From

What it prints

The project in Files, or the project's header

The whole project, or its default variant

A variant

That variant

A plate

That plate

A print file

That one print file


When everything is sliced, the project header's main button is Add to print queue or Start print.


Adding to the print queue

  1. Click Add to print queue.
  2. The add-to-queue form lists the project's variants as rows. Choose how many of each variant to print.
  3. Set the usual queue options, such as tags, allowed printers and deadline.
  4. Confirm.


The Add to print queue form for a project with 12 variants: tags, printers and a note, then the variant row Small · Terracotta (FW-PLT-S-TER) with a quantity of 0 and 1 plate, and Cancel and Add


Plates that aren't sliced yet

The form shows each print file's state:


  • Sliced when added: it isn't sliced yet and will be sliced when you add it.
  • Out of date: the project changed since it was sliced.
  • Couldn't slice: the last slice failed.
  • Slicing now: it is being sliced.


When something still needs slicing, the button reads Slice and add. Pre-sliced plates are never resliced.


See: Pre-sliced files in a project: sliced 3MF (.gcode.3mf) and G-code


One queue entry, any printer that fits

A project goes into the queue as one queue entry, not one entry per file. It isn't tied to one printer: a printer that can take some of the project's plates fits it, and the queue says how many, such as "4 of 6 plates", with what the others need. 1-Click Print and AutoPrint can start a plate that printer takes.


What you asked for when you added it, the variants and how many of each, stays as it was. Deleting the project afterwards doesn't delete queue work you keep.


Starting a print straight away

Start print starts a project on a printer now, using only print files that are already sliced. When you pick a project in Start print on a printer, you see the print files that can print on it. When it is done, SimplyPrint says Started on (printers), or Nothing started if no print file fit.


AutoPrint and the queue

With AutoPrint, a project's queue lines say what they are waiting for, for example "Ready on the Bambu Lab P1S: AutoPrint starts it on its next round".


If your account loses Projects, for example after a plan change, queue entries already made from a project still show, print and are taken by AutoPrint.


Printing again

A plate that has printed can be printed again with Put back, which returns it to the queue.


When the project changes after queueing

Copies not started yet print the plate's current print file. If a plate is sliced again after you queued it, the waiting copies use the newer slice, as long as it is for the same setup: the same printer model, nozzles and bed. A filament set on a print file also reaches its copies not started yet. Copies already printing are not touched.


Projects


The print queue and AutoPrint

Updated on: 06/11/2026

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