This machine's defining number is its 500 mm Z travel, the tallest here. Height is the specification people buy on and the one they think about least carefully, because a print's difficulty does not scale with its height — it scales with the hours the print spends unattended, and hours scale with volume.
A tall column, timed
A 460 mm column with a 12,000 mm² footprint, 0.28 mm layers through a 0.6 mm nozzle, 10% infill, head speed set to 200 mm/s:
12 hours 43 minutes, over 1,643 layers, extruding 814,498 mm³ of plastic.
The instructive part is what the machine actually does with that speed setting. The requested combination demands 38.08 mm³/s of flow against a 24 mm³/s ceiling, so the printer runs at an effective 126 mm/s instead. Doubling the commanded speed to 400 changes the estimate by nothing whatsoever, because the hotend was already the limit.
Raising the layer height would help; raising the speed will not. Both are visible in the print time estimator, which carries a ±30% band because no first-order model knows your geometry — the comparison between settings is far more trustworthy than the absolute figure.
What twelve unattended hours means
A print of that length on an open machine is a risk position, not just a job:
- The room changes over twelve hours. Doors open, heating cycles, the sun sets. Every one of those is a draught across a tall part.
- The spool must last. Weigh it first and convert to length with the length and weight converter; running out at hour ten is a specific kind of avoidable.
- A single knock ends it. A 460 mm column on a plate that reverses direction on the Y axis is the most leveraged version of the bed-slinger's central weakness.
The most effective mitigation is design rather than settings: split tall parts at a natural joint and glue them. It converts one long risky print into two shorter safe ones, and it usually finishes sooner because both halves print with a bigger footprint and better cooling.
The plate, and what it does to running cost
420 mm square, open to the room, and it must be held at temperature for the whole job. That is the most expensive arrangement here to keep hot, and this machine's wattage figure reflects it — as an estimate derived from comparable large open beds, not a plug-meter reading, which the specifications state rather than imply.
Even so, the electricity term on a twelve-hour PLA print at this size is well under a dollar at the US average, and it stays under a couple of dollars at the dearest rate in the regional table. Put your own tariff into the cost calculator and it will be the smallest line in the result.
Levelling a plate this size
A 420 mm bed cannot be assumed flat, and it changes shape as it heats. Two habits make this machine much less frustrating:
- Probe the mesh at printing temperature, not cold. A cold mesh describes a surface that no longer exists once the bed is hot.
- Re-probe after moving the machine, and after a large temperature change in the room.
Skip either and you get a first layer that is flawless across the centre and lifted at one corner — which presents as an adhesion failure and is really a geometry one. The uneven first layer page has the full diagnostic order.
Materials
PLA and PETG are the honest list, with the same 260 °C hotend ceiling as the smaller machines in this family. High-shrinkage materials are a poor idea at this footprint regardless of temperature: warping force grows with distance from the part's centre, and this plate is mostly distance from the centre.
The case against buying one
If height rather than area is the appeal, the CR-10 Smart Pro gets close in a machine that occupies far less room. If area in warping materials is the appeal, an enclosed large-format machine is the only thing that delivers it. And if you have not yet run a twelve-hour print and enjoyed it, because that experience is what this printer sells and it is not to everybody's taste.