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The software driving your 3d printer

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Repetier-Host Documentation

Object Placement


Prepare all objects you want to print, so your printer can print them. Learn how to arrange them on your print bed. Rotate and scale them to your likes.


Open the “Object Placements” tab. You will see the print area on the left side. You start with importing all STL files using the “Add Object” button Add Object. You can select multiple object files at once if you want. This must be in one of the following formats: STL, OBJ, 3DS. The host will always try to position the objects in a non overlapping way onto your bed.

Browsing 3D View

3D View
In this window you see your 3D objects. At the left side, you find some navigation buttons:

The first 4 buttons change the behaviour of the left mouse button. Starting at the top, you get “Rotate” Rotate, “Move Viewpoint” Move Viewpoint, “Move Object” Move Object and “Zoom” Zoom. All funtions can be used with kontrol keys, so that you don’t have to change all the time.

ViewControl: Holding the control button, you can rotate the view with the left mouse button.
Shift: Holding shift button you can move the view point with the left mouse button.
Right Mouse Button: Move the object by holding the right mouse button.
Mouse Wheel: Zoom view

With this icon Zoom Objects to fit the objects will be zommed to fit exactly in the preview area.

With the next three icons Isometric View Front View Top View you can select between predefined view orientations. You find more view options at the top View menu:

Fit Printer (Strg+A): Zooms to fit the complete printer area into the window with maximum size.
Fit Objects (F5): Zooms to fit all objects into the window with maximum size.
Show Edges (Strg+E): Toggles display of triangulation edges.
Show Faces (Strg+F): Toggles display of triangulation faces.
Show Compass (Alt+C): Toggles display of coordinate compass at the left bottom.
Toggle Printer ID Vies (Strg+I): Toggles the display of the printer ID on top of the right tab. Use this to distinguish the printer wwhen you have more than one host running.

“Use Parallel Projection” Use Parallel Projection toggles between parallel and perspective projection.

Object Placement

Export Here you can export all displayed objects at once. If you save them as .amf file, the object grouping and material assignments remain intact, if you save it as .stl or .obj file, everything gets combined into one object.

Add Object Here you can add objects in .stl, .obj, .amf and .3ds format.

Copy Object(s) Here you can duplicate the marked object(s) as many times as you want.

Autoposition Click here to place all objects so that they fit on the bed.

Center Object This function centers the marked object in the center of the bed.

Scale Object With this function you can scale the marked object.

If the lock is closed, all axes are changed simultaneously. If you click on the lock to unlock, you can adjust each axis separately and the object may be distorted. A click on “Scale to Maximum” enlarges the object so that it has the maximum printable size.

Rotate Object With this function you can rotate the marked object around each axis. Click on “Lay Flat” to place the object flat on the bed.

Cut Objects This option is only used to control the object and has no influence on the print. With “Position” the height of cut position is defined, “Inclination” and “Azimuth” define rotation of the cutting plane.

Selecting and moving objects

You can select one object by right clicking on it. If you press the ctrl-key while right clicking  the selected object is added. ctrl-clicking a selected object removes it from the selection.

To move the selected objects, hold the alt-key down while left clicking and dragging the objects. When you select “Top View” Top View from the left toolbar, the movements will follow your mouse movements. If you don’t, the direction of the move is not the same of the mouse movement.

Depending on your configuration, the object may start to pulse or change it’s color, if it is not entirely on the print bed. This should help you identifying printing problems, even before you start slicing.

Grouping Objects

Object groups are used only for multi extruder prints. For multi extruder prints you normally get one stl file for each color. After you loaded them, each has it’s own group, which normally causes wrong relative positioning. So you need to drag the second stl onto the first stl to merge them into one group. After merging you have to assign each file a separate extruder. Assigning the same extruder will normally cause problems during slicing.

Now it’s time to slice your objects. Open the slicer tab and continue there. More on this in the next chapter.

Continue with slicing