When printing multiple objects at once, you can choose to finish them sequentially, one at a time. This can minimize oozing and strings running between the prints. It can also prevent losing multiple half-finished prints if one of the objects detaches from the print bed.
You can turn this feature on by enabling Print settings - Output options - Complete individual objects.
Press the E key to see the order of objects in the 3D view.
You can change the order by dragging and dropping objects in the Object list. The top-most object in the Object list will be printed first, and the bottom-most last.
You'll have to check on the printer regularly, with every object there is a chance that the specific part won't stick to the print bed.
Collisions
With sequential printing, there is a possibility of collisions between the print head and one of the finished prints or between the X-axis and one of the finished prints. PrusaSlicer will try to warn of such cases, but even if you get no warning, you should try to avoid possible collisions as much as possible.
to minimize the chance of collision with the extruder and the X-axis.
If PrusaSlicer detects a collision, it will visualize it with a red highlight of the overlapping regions.
To help PrusaSlicer detect collisions, specify the Extruder clearance settings.
Radius
The radius of the cylindrical clearance around the extruder.
Height
The vertical distance between the tip of the nozzle and the X-axis rods (or the lowest part which may interfere with a finished print).
PrusaSlicer wants all objects to be below the extruder clearance height except for the last object, which can be as tall as the printer's max Z.
Visual representation of the default parameter, creating a keep-out zone of 45mm radius and 20mm height around the nozzle (thanks to David Renaud)
The collision detection logic is pretty basic and will sometimes prevent you from Exporting printable G-code. It's up to you to take responsibility and increase the height tolerance.
Example
Height clearance is 20mm.
The object is 25mm tall.
Objects can be printed sequentially, but the current collision logic does not distinguish between the left scenario (not printable, collision with the X-axis rod), and the right scenario (printable). So you have to change the value manually (height clearance).
30 comments
If you really want to go above and beyond, add the ability to set automatic color changes between object prints in sequential printing. Among other things, this would make multipass first-layer color changes much easier. The current workaround requires manually editing the color changes into the G-code.
Multipass, first layer color changes allow for text and logos that are so much nicer than simple embossing without needing any kind of MMU.
Taking it back is not on our list at the moment. The question is more about whether you achieve a successful print within the new sequential arrangement!?
I've wasted 4hr of my production day just trying to find HOW to place things when the auto-placement clearly demonstrates repeated FAILURE to arrange multiple items with 30mm for even a basic logical sequential print of 5 items on the Prusa mini.
👉 I've Reverted to the last version with manual placement and red spacing indication.
In my case i use PS on a very very custom machine, where my active airflow on the bed is not homogenous in all location, so manual adjustment to the location and best order is a must for me.