The K1 is sold on a speed figure, and speed figures on 3D printers are close to meaningless in isolation. What decides how long a part takes is not how fast the head can move — it is how many cubic millimetres of plastic per second the hotend can melt. Past that ceiling, raising the speed setting changes nothing about the machine's behaviour except the number displayed on it.
This machine is a good place to prove that, because its hotend is genuinely high-flow and the point still holds.
A real part, timed
A 120 mm-tall part with a 4900 mm² footprint, 0.2 mm layers, 15% infill, 0.4 mm nozzle, head speed set to 300 mm/s:
1 hour 46 minutes, across 600 layers, extruding 120,062 mm³. The requested flow is 27 mm³/s against a 32 mm³/s hotend ceiling, so the machine really does run at the requested 300 mm/s.
Now double the head speed to 600 mm/s and re-run it: 1 hour 31 minutes. Fifteen minutes saved from a doubling, because at that setting the demand is above what the hotend can melt and the machine settles at an effective 355 mm/s regardless of what you asked for.
The 32 mm³/s ceiling is an input to the print time estimator, not an assumption inside it, which is what makes the second run worth doing: raise that field and the doubling starts behaving the way people expect it to. Its stated error band is ±30%, since no first-order model can know the shape of your part — but the two runs share that error, so the gap between them survives the uncertainty even where the absolute minutes do not.
The lesson generalises: on this machine, the effective speed upgrades are a larger nozzle and a taller layer, both of which move more plastic per millimetre travelled. Nothing in the speed setting does.
Power, and this one is measured
The figures here are not estimates. An independent review metered this printer through a monitored socket: about 20 W sitting idle, a peak in the region of 370 W while the bed and hotend come up, then roughly 100 W steady with spikes as the bed cycles to hold temperature.
That 370 W peak is the one people quote as though it were the running cost. It lasts minutes, and the average over a print is what your supplier bills. Put the steady figure into the cost calculator and the electricity term on the part timed above comes out at a few cents.
A 220 mm bed inside an enclosure
The K1's build area is modest for the money — the same plate as budget bed-slingers costing a third as much. What you are paying for is the box around it and the speed of the thing inside it.
Nothing heats that box deliberately — the plate does it, and the walls keep the result in. Across a footprint this small that works, and ABS and ASA are genuinely available in a way they never are on an open machine. Polycarbonate still is not, except on small parts.
The compensating strength is the hardened nozzle fitted as standard. Filled and abrasive filaments work from the first spool, with no purchase and no swap first, and on a machine aimed at functional parts that is more useful than it sounds.
Fast, enclosed and compact: the consequences
Enclosed, fast and compact is a combination with its own list:
- Heat creep on long runs, because a warm box softens filament earlier along its path than a cold room does. Owners handle it by leaving the door ajar once a tall ABS job is past its halfway point.
- Layer shifting when profiles outrun the frame. Fast CoreXY motion is hard on belt tension; a shift that appears at the same height every time is mechanical, and one that appears at random heights is usually the toolhead colliding with a curled part.
- Nozzle hitting the print, which at these speeds turns a small curl into a knocked-off part quickly.
Firmware, and the community that reflashes it
It was this manufacturer's first serious CoreXY consumer machine and has since been joined by a carbon-focused revision and by larger models in the same family. Firmware openness has been a running theme in its community, with rooting and third-party firmware widely used to get around the stock interface's limits — which tells you something about who it suits.
Buy it if you want speed and an enclosure in a small footprint and you are comfortable tinkering with a machine that is not entirely open. Buy the K1 Max if the 220 mm plate is the constraint. Buy something quieter and simpler if you want an appliance — this machine's fans are not subtle, and no firmware change makes them so.