axes configuration on extruder and bed plate

[Sahraeian38]

hello ... i'm a master student and i'm working on my thesis about FDM 3d printers. i want to know about following question. "what is differences between axes placement arrangement on extruder and bed plate?" (z head-xy bed),(xy head-z bed),(xz head-ybed),(xyz head),(x head,yz bed) ...
.
.
it's just a question that i have about project ... the detail topic of my thesis is "Design and optimization of support in additive manufacturing process based on polymer extrusion" before i do my thesis i must manufacture a fdm 3d printer ... It should be noted that we are three people

[curious aardvark]

well the differences are the obvious ones. Different parts of the printer move in different planes.

If you mean what are the advantages and disadvantages of the different systems.
I suspect it's mainly in print speed.

i3 type printers where the bed moves in the x-axis and the printhead in the z and y seem to have lower top speeds than systems where the prinhead moves in x&y and the printbed moves in the z axis.

In the case of delta machines where the printhead moves in all three axis, you seem to be able to have good speed and good detail as well.
But you are generally limited to a bowden system.

To a certain extent it depends how well the printer manufacturers design their machines. Some printers with the same layout will be able to print significantly faster than other less well designed machines with a similiar configuration.

The faster machines that I have seen all use the x&y movement for the printhead and the z axis for the printbed.
Speed is largely dependant on how solid the printer is and how heavy the extruder gantry is.
A lot of the newer faster printers are using bowden setups to reduce gantry weight and increase printspeed.

Hope that helps :-)

[Sahraeian38]

Mr @curious aardvark , Thanks a lot for your answer to my quesyion.
about differences that i said in my question, i mean this is difference between the feature's, application's, advantages and disadvantages of these configuration. for example see the address : http://3dprinting.stackexchange.com/...a5ad73f680b3ca
in this case of print speed, you are right and helped me a lot.
thank's.