A cartesian printer, bed slinger or CoreXY, drives X, Y and Z as separate, independent movements. A delta printer hangs the nozzle from three arms and moves all three towers together for every single move, even a straight line along one axis. That shared math is why delta printers behave so differently once you start printing on one.
Build volume is a cylinder, not a box
A cartesian machine’s build volume is close to the rectangular box its frame suggests. A delta’s usable area is closer to a cylinder that narrows near the top, because the arms lose reach and angle as the nozzle approaches the edges of the towers. A delta with 300mm towers does not print objects the size of a 300mm cube. Check the printer’s actual published build volume, not the tower height, before assuming it fits a specific model.
Moving mass and top speed
Delta arms are light, and the motors that matter sit at the base of the towers instead of riding on the gantry. That keeps moving mass low even at the far edges of the print area, which is part of why delta kits built for speed (Kossel-style machines, some resin curing rigs) can hit high travel speeds. In practice, hotend flow rate and cooling still cap useful print speed on both layouts, so a fast delta frame does not guarantee a faster finished print.
Calibration has more moving parts
A cartesian printer levels with a handful of points and, on most modern machines, an automatic mesh. A delta needs its own calibration routine: tower angle, delta radius, rod length and endstop offsets all have to agree before the nozzle actually goes where the firmware thinks it is. Marlin and Klipper both support delta auto-calibration, but the printer needs several extra parameters set correctly first, and a single bent rod or loose magnetic joint throws off the whole print area rather than one corner.
Where you’ll actually find each layout
Cartesian and CoreXY dominate current consumer printers. Bambu Lab, Prusa, Creality, Anycubic and QIDI all ship cartesian or CoreXY machines. Delta printers are mostly a hobbyist and kit-builder category now, more common in DIY communities than in current retail lineups, and parts or community support for a specific delta kit can be thinner than for a mainstream cartesian machine.
Delta vs cartesian checklist
- Confirm the delta’s published build volume, not tower height, against the parts you actually print.
- Budget time for delta-specific calibration (tower angle, rod length, delta radius) before the first real print.
- Check parts availability and community support for the specific delta kit, not delta printers in general.
- If build volume needs to match the frame size closely, a cartesian or CoreXY layout is the simpler default.