T300 3D Printer Max Speed up to 600mm/s, Klipper Firmware 300℃ All-in-one Hotend 30s Preheat Time 81-Point Auto Leveling 95% Pre-Assembly All Metal Body 11.8 * 11.8 * 13.8in

I suppose quality control issues are to be expected at this price point, but I was one of the unlucky ones that got a unit that had a couple of issues. The first problem was the X-gantry (the horizontal rail that moves up and down on the 2 vertical rails, and carries the print head side to side) being significantly tilted. You could even notice it by eye. The right side of the rail rode about 2-3 mm lower than the left. I even checked the level using a good bubble level, and while the table and bottom rails were all perfectly level, the X gantry was way off. This necessitated, when it came time to level the bed, that the bed leveling adjustment thumbwheels on the left side be almost to their extreme clockwise position, while the 2 on the right be at their near-extreme counterclockwise position. It also meant that the Z-limit switch be positioned in an exact spot that had to be arrived at with iterative adjustments of the thumbwheels and limit switch. I should note I also tried turning the Z motor/threaded rod coupler, but it would slip back to the non-level orientation. Not a good way to spend an afternoon. But I finally made it work. Then problem 2 (after spending so much time bed leveling): the SD card would not go into the reader slot. Turns out the tiny slot on the metal case was misaligned with the actual SD card socket, presumably soldered to the motherboard at an angle. The socket plastic actually cracked when I tried to pull the crooked SD card back out after managing to insert it, at the angle it demanded. So that's as far as I got, and set up a return to Amazon. I was also concerned that when I ordered the unit there were, and still are as of the date of this review, two listings on Amazon, both from the Sovol Store, for the SV01. This one, at $285 with a $25 coupon (so $260 net) with a bonus 5 extra nozzles. Then the main listing (it appears first when you search on Sovol SV01) for $305 with a $40 coupon (so $265 net, but no extra nozzles). Is the "better deal" $260 unit B stock? Hmmm, my one data point would indicate as much - but you know where one data point will get you. Other than these quality control issues (and it could have had something to do with shipping as well - though the unit is very well packaged in custom cut stiff foam), the SV01 appears robustly designed and manufactured, with a good feature set for the money. I hope my replacement unit allows me to actually use them. I will update my 1 star initial review, hopefully, after successfully setting up the replacement and using it. Update 9/24/2020: Received a replacement unit, but the X-gantry was also out of level by the same amount. Seller had contacted me in the meantime and opened a dialog. The sent a quick video on how to adjust the level on the X-gantry. This was a different procedure than was described in a few posts on the Facebook Sovol Group, and involved an adjustment of the eccentric nut that holds the gantry. Easy adjustment, but the procedure should be described more widely since quite a few people struggle with the leveling of the x gantry it seems (and hence bed leveling). Also it is worth noting the SD card slot accepts the card in the upside-down orientation (contacts facing up), so keep that in mind! Once I got the X-gantry level, bed leveling was a breeze, got the printer talking to the latest version of Cura (which now includes a file for the Sovol , so no manual changes needed), popped in the SD card and selected the XYZ cube file. Off it went, and made a perfect XYZ cube right off the bat! So great support from Sovol via Amazon, a great printer (after an easy adjustment - it just needs to be more available), equals 5-stars.

Background As a field service technician with nearly a decade of experience working on industrial CNC machinery, I have extensive knowledge of precision mechanical systems. I’ve been using the Comgrow T300 3D printer for four months, and this review reflects my experience with its performance and reliability. Initial Impressions The T300 is marketed as a budget-friendly 3D printer with a large build volume, but its reliability has been disappointing. Despite my technical background, I’ve encountered persistent issues that have made this printer frustrating to use. Issues Encountered Y-Axis Tensioner Failure: On the first day, the Y-axis tensioner snapped. While Comgrow sent a replacement part, it took weeks to arrive from China. I designed and printed a replacement myself, rendering the shipped part unnecessary. Y-Axis Layer Shifts: For prints longer than 5–6 hours, I noticed significant layer shifts in the Y-axis. After troubleshooting, I determined the stepper motor was overheating, losing torque, and missing steps. I upgraded to a stronger stepper motor, added a heat sink and fan, and reduced max acceleration to 3000 mm/s² and print speed to 80 mm/s to prevent overheating of the motor and driver. Extruder Tensioner Failure: Shortly after resolving the Y-axis issues, the heated insert in the extruder tensioner failed. I purchased a new tool head from Comgrow, which was easy to swap since it’s sold as a complete unit. However, the PTFE liner in the new heat sink was warped or crushed, preventing filament loading. I reverted to the original hot end, managed one successful print, and then encountered further extrusion issues that remain unresolved. Ongoing Reliability Problems: The T300’s stock components, particularly the tool head and electronics, have consistently underperformed. I’m now planning to replace the stock tool head with a custom Stealthburner setup and may overhaul the electronics entirely. Performance When Functional When the T300 works, it produces high-quality prints with good detail. However, achieving consistent performance requires significant modifications and constant troubleshooting, which is unacceptable for a consumer-grade printer. Pros Print Quality (When Working): Capable of producing detailed prints with proper calibration. Large Build Volume: Suitable for larger projects, a plus for hobbyists. Affordable Price: Competitive for its size and feature set, though reliability issues diminish this value. Cons Poor Reliability: Frequent hardware failures and overheating issues. Slow Support and Shipping: Replacement parts take weeks to arrive from China. Subpar Components: Stock tool head and electronics are prone to failure and require upgrades. Time-Intensive Fixes: Requires advanced technical knowledge to maintain functionality. Final Thoughts The Comgrow T300 3D printer has potential but is plagued by unreliable components and frequent failures. While it can deliver good print quality when operational, the constant need for repairs and modifications makes it a poor choice for most users. Even with my extensive experience in CNC systems, I found the T300’s issues excessive compared to other 3D printers I’ve used. Unless you’re prepared to invest significant time and money into upgrades, I recommend looking at more reliable alternatives.

Goes off calibration easily in my case. I do not recommend for beginners.

No fuss, easy setup. Works great very reliable. Just use purple glue on base mat and works great every time. Very good quality.

I am amazed how well it prints out of the box. And easy to assemble too! The thing I love the most on this printer is its huge build size, that I printed my whole Spiderman face shell with it. Ease of use and the UI is easy to understand and very straight forward. I am still new to 3d printing but I’m glad I had this as my first printer.

Got it and it had a thermistor error. Tried contacting the company, no response

Impressora muito boa, fácil de montar, ótima área de impressão, vem com todas as chaves para fazer a montagem e a regulagem da impressora, só o cartão micro SD que deu defeito recomendo a quem for comprar ter um cartão reserva pois a impressora parou de imprimir no meio da impressão e o problema era o cartão micro SD troquei por outro e acabou o problema.