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Three motion architectures dominate the hobbyist market and each one has different strengths. The architecture sets your speed ceiling, your noise floor, the shape of your print volume, and which categories of artifacts you'll fight. Pick a printer (or upgrade path) without understanding this and you'll buy the wrong machine for what you actually want to print.
How each kinematic system moves the print head.
CARTESIAN (bedslinger):
X motor moves the print head left-right.
Y motor moves the BED forward-back.
Z motors raise the X gantry.
Example: Ender 3, Prusa MK4, Bambu A1.
Pro: simple, cheap, easy to repair.
Con: bed inertia limits speed; tall prints wobble; large build volume = larger machine.
CORE-XY:
Both X and Y motors are stationary at the frame.
Two crossed belts move the print head in the X-Y plane.
Bed moves only in Z (slow, vibration-free).
Example: Voron 2.4, Bambu X1C / P1S, Prusa XL.
Pro: fast (can hit 500mm/s+ with input shaping), good for tall prints, low inertia.
Con: belt routing is finicky; harder to DIY; needs square frame to print square.
DELTA:
Three vertical towers; print head suspended on three arms.
All three motors cooperate for every X/Y/Z move (parallel kinematics).
Bed is fixed; head moves in all three axes simultaneously.
Example: FLSun, Anycubic Kossel.
Pro: very fast Z moves, tall print volume, beautiful to watch.
Con: calibration is harder (delta radius, arm length, tower lean), build volume
is cylindrical (corners often unusable), repair is more involved.
For a beginner: Cartesian is the cheapest entry; CoreXY is the modern sweet spot.