Are you on the lookout for a reliable 3D printer with plenty of room for big projects and a gentle learning curve? Meet the Longer LK5 Pro 3D Printer with Dual Z-Axis Upgrade, a large-format FDM printer with a 300 x 300 x 400 mm build volume, a 4.3-inch color touch screen, a silent motherboard and filament run-out detection. Settle in as I take you through what this well-rounded machine has to offer.
Longer LK5 Pro 3D Printer with Dual Z-Axis Upgrade, 4.3" Color Touch Screen, Silent Motherboard, Large Print Size 11.8"x11.8"x15.7", Fully Open Source, Filament Run-Out Detection
Room to Create: A 300 x 300 x 400 mm Build Volume
Space is often the first thing makers run out of, usually halfway through designing something ambitious. The LK5 Pro answers that with a generous 300 x 300 x 400 mm (11.8 x 11.8 x 15.7 inch) build volume, which Longer describes as a larger creation space to meet more of your 3D printing needs. That extra height in particular is worth noting: at 400 mm, tall vases, lamp shades, cosplay pieces and full-size props can be printed standing up rather than split into sections.
A bigger bed also means you can fit several smaller parts onto a single plate, which is a quiet time-saver when you’re printing a set of game pieces, organizers or replacement parts in one go.
Steady Speed: 180 mm/s Printing
Longer rates the LK5 Pro for printing speeds of up to 180 mm/s, which it says is faster than the industry standard. It isn’t trying to win a drag race against the newest high-speed machines, and that’s perfectly fine. For a large-format printer aimed at dependable everyday work, a steady, capable pace is often the more sensible priority.
Large prints take time on any machine, so it’s reassuring that the LK5 Pro pairs its speed with features designed to protect long jobs, which we’ll come to shortly.
Dual Z-Axis Upgrade: Stability is Everything
A tall print bed and a single Z-axis motor can be an uneasy combination, and the last thing anyone wants on a 400 mm print is a gantry that sags or tilts. This version of the LK5 Pro includes a dual Z-axis upgrade kit, which Longer says enhances stability and accuracy while delivering smoother operation and improved print quality.
There’s a practical bonus too. Longer notes that the dual Z-axis setup reduces bed leveling effort, because both sides of the gantry are driven together and are less likely to drift out of alignment. For anyone who has chased a wonky first layer across a large bed, that’s a genuinely welcome improvement.
A Sturdy Frame and a Glass Print Bed
The LK5 Pro uses a reinforced design with diagonal bars that form a stable triangular structure. Triangles are nature’s favorite shape for strength, and here the aim is to minimize vibration so the printer stays steady as the print head moves, especially important on a machine this tall.
The print bed is a lattice glass plate. Longer says it makes finished models easier to remove and keeps the heated bed flatter, both of which contribute to higher-quality prints. A flat bed is the foundation of a good first layer, and an easy release saves you from prying at a finished print with a scraper and a prayer.
Filament Run-Out Detection and Print Resume: Keeping Calm Under Pressure
Few things are more deflating than coming back to a large print that stopped halfway because the spool ran dry or the power flickered. The LK5 Pro is equipped with filament and power detection sensors that intelligently pause printing if the filament runs out or the power unexpectedly fails.
Once power is restored or new filament is loaded, the printer can resume from its last printing position. Longer points out that this saves time and reduces waste, and on a print that has already been running for hours, that can be the difference between a minor pause and starting all over again.
The Breakdown: A Bite-Sized Table for Quick Reference
Reading through blocks of descriptive text can be a tad overwhelming, so here’s a neat table summarizing the key details of the LK5 Pro:
| Feature | Details |
|---|---|
| Build Volume | 300 x 300 x 400 mm (11.8 x 11.8 x 15.7 in) |
| Print Speed | Up to 180 mm/s |
| Z-Axis | Dual Z-axis upgrade kit included |
| Frame | Reinforced diagonal bars forming a triangular structure |
| Print Bed | Lattice glass plate |
| Sensors | Filament run-out and power loss detection with print resume |
| Drivers | Ultra-silent TMC2209 |
| Firmware | Open source, customizable via G-code |
| Screen | 4.3-inch color touch screen |
| Assembly | 90% pre-assembled |
Striking a Balance: Pros and Cons
Every printer involves a little give-and-take. Here’s how the scales weigh up for the LK5 Pro:
Pros:
- Generous Build Volume: 300 x 300 x 400 mm leaves room for tall prints and full plates of smaller parts.
- Added Stability: The dual Z-axis upgrade and triangular frame are designed to reduce vibration and keep the gantry level.
- Peace of Mind: Filament run-out and power loss detection let long prints pause and resume instead of failing.
- Quiet Operation: Ultra-silent TMC2209 drivers help keep noise down.
- Room to Tinker: Open source firmware welcomes customization through G-code.
Cons:
- Not Built for Raw Speed: At 180 mm/s, it isn’t aimed at buyers chasing the fastest possible print times.
- Manual Bed Leveling Likely: Longer’s listing doesn’t mention automatic bed leveling, so plan on leveling the glass bed yourself, with the dual Z-axis kit making the job easier.
- Some Assembly Required: At 90% pre-assembled, there are still a few steps before your first print.
Quiet, Open and Beginner-Friendly
A large printer can easily become a noisy roommate, which is why the LK5 Pro’s ultra-silent TMC2209 drivers are such a thoughtful inclusion. They’re designed to keep the machine quiet, making it far easier to live with in a home office, classroom or spare room. And for the curious, the open source firmware invites experimentation: Longer encourages you to try your own ideas by changing the G-code.
At the same time, the LK5 Pro remains approachable for newcomers. It arrives 90% pre-assembled, which Longer describes as perfect for beginners, and the 4.3-inch color touch screen gives you a clear, friendly way to control your prints.
That combination is what makes the LK5 Pro appealing: it’s simple enough to start with, yet open enough to grow with as your skills and ambitions expand.
In Conclusion: To Print Big or Not to Print Big
The Longer LK5 Pro 3D Printer with Dual Z-Axis Upgrade brings together a large 300 x 300 x 400 mm build volume, a stable triangular frame, a lattice glass bed, quiet TMC2209 drivers and sensible safeguards like filament run-out detection and print resume. It’s a practical, well-balanced machine for makers who value space and reliability over headline-grabbing speed.
If you’re like me and your ideas have a habit of growing taller than your current print bed allows, the LK5 Pro is well worth a closer look. It offers room to think bigger, with the kind of steady, forgiving design that lets you spend more time creating and less time troubleshooting.
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