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Prusa CORE One L+ review: More precise

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Why This Matters

Prusa's incremental $25 upgrade kit for the CORE One L 3D printer fixes a persistent nozzle-wiping flaw and adds sturdier belts, improving reliability without forcing owners to buy a whole new machine. This approach highlights a consumer-friendly trend in hardware where manufacturers extend the life and performance of existing products through affordable mods rather than pushing costly replacements.

Key Takeaways
Worth a Look

Prusa CORE One L+ 3D Printer — If you're intrigued by this precision upgrade to the CORE One lineup, the CORE One 3D printer itself is a fantastic entry point into Prusa's ecosystem. It offers the reliability and print quality Prusa is known for, with the added benefit of being upgradeable over time, just like the L+ mod discussed in the article.

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The CORE One L+ update is small, but important: a new nozzle wiper and better GT1.5 belts that adds quality and reliability. This update can be purchased as a mod and added to a machine you already own, so there’s no buyer’s remorse for current Prusa users.

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How do you make a really good printer even better? How about a $25 upgrade kit? Recently, Prusa Research rolled out a series of upgrades to the big three: the CORE One, CORE One L, and the XL 3D printers. Since the CORE One L is the newest printer of the batch, it only needed a tweak rather than a full overhaul to earn a “+” designation. No one was surprised by this update, as Josef Prusa has a reputation for upgrading his machines rather than letting them fall by the wayside. In fact, the CORE One L is only the third major variation of Prusa-designed printers since the company was founded in 2012.

As we were wrapping up this review, Prusa Research announced the CORE One L+ is now compatible with the Prusa INDX conversion kit , which is $799 for four tools, or $1,079 for eight. We’re currently reviewing the INDX on a standard-size CORE One + (Gen 2), and spoiler alert: it’s running spectacularly.

The Prusa CORE One L never left my workshop since its introduction nearly a year ago. In over 1000 hours of hard use, it’s been quietly printing abrasives like carbon and glass fiber, and even a pinch of Prusa Ultra Glow, with no problems. It’s been a real workhorse for practical prints.

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The “plus” upgrade removes a super annoying flaw that has spoiled an otherwise perfect machine: nozzle wiping failures. Before this upgrade, all Prusa machines would clean the nozzle before bed leveling by tapping the bed, leaving little dots of filament on the plate. When you’re running higher-temp filaments, oozing is a real problem and nozzle wiping fails are more frequent. The error itself isn’t a big deal, and I would often choose to ignore it as I still get excellent prints. The problem is the time I’d lose if I wasn’t watching the printer like a hawk, as the printer would shut down bed heating while it waits for you to come tend to it.

We’ve had nozzle wipers on other brands of 3D printers for years now, and it’s a relief that Prusa has finally gotten on board. With a simple addition of a silicone brush, the CORE One L+ is now one of the few printers I trust to set it and forget it.

The Prusa CORE One L+ upgrade also came with a set of GT1.5 timing belts. The tighter tooth spacing on the belts and drive gears makes an already precise system more precise, resulting in smoother surfaces.

(Image credit: Tom's Hardware)

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