The Two Trees Sapphire Pro is a type of printer that I have not yet tested. With a complete cage and a pressure bed that only moves up / down but not forwards or backwards. This means that the notorious layer shifts should no longer occur and printing should be carried out more calmly and with less vibration. Despite the full cage for stabilization, you get a usable printing area of at least 235x235x235mm. You can currently get the printer at Aliexpress.
Unlike the conventional printers we know, the Two Trees Sapphire Pro has a slightly different structure and works differently. Here only the extruder moves in the X and Y axes instead of only in the X axis or upwards on the Z axis. However, the heating bed now moves down for each shift. Otherwise it normally acts back and forth on the Y-axis. But I have to admit the construction of the Z-axes with the connected print bed / print surface looks great.
Due to the aluminum frame, there should be a much more stable housing that should also deliver correspondingly clean prints. There should also be significantly fewer vibrations and movements during the printing process. Silent driver stepper motors were also installed for this purpose. The printing area is 235x235x235mm and easily covers the most common prints that you will need in everyday life. Should it get bigger, the 3D models can also be split up using software and printed individually. Because we are currently working on software, here you have the free choice whether you want to use Cura, Repetier-Host or another software. In addition to the autolevel sensor there is also a filament sensor been integrated.
The printing accuracy is ± 0.01mm, the Z-axis accuracy is 0.0025mm, the X / Y-axis is 0.01mm accuracy, the nozzle diameter is 0.4mm, the filament used is the usual 1.75mm. The layer height can be adjusted to 0.1 to 0.4 mm (via software). The consumption during operation is a maximum of 360W.
The test device has arrived and should be put together in a 2.5 hours. To begin with there was not enough time and the cabling is not yet in the way it is needed to function properly. You have to plan more time here, depending on your level of knowledge. The current price is $299, which is basically very good price for this kind of 3D printer.
The basic structure of the frame is less of a problem, the quality of the selected material and also the stability after construction are convincing. Two screws are required on each side to attach the Z-axis structure very quickly, and the printing platform can also be attached quickly and well described in the instructions. Even if screws are already screwed in here that would have to find their way there according to the instructions, well no thing can be seen. Even if it is a bit confusing at first.
Once you have put the lid on the 4 arms and screwed it on quickly, the real work begins. The printhead is still the pleasant part to be attached to 3 screws, also already attached. Well, you can see the 3 screws, loosen them and screw the printhead to them, tighten.
First, I would like to briefly say a few words about the structure. This went off without any major problems. The few assemblies (struts, threaded rods, linear guide, print head and cover) are assembled within half an hour. Then you should take enough time to properly lay the tapes and, above all, to tension them properly. It helps that the belt is of good quality and can be tensioned properly and tightly even under the greater tensile forces of the Core-XY system. It took me most of the time personally to properly lay the wiring harness. There are only a few connectors, but I wanted to lay them as neatly as possible (inside and outside of the printer). However, this wasn’t too much of a challenge, as the cables are well labeled and thus each cable had its place on the main board without any problems.
Once you’ve done that, all you have to do is install the cabling and the rest of the accessories, neatly packed in bags.
Well, according to the instruction promo pictures, there is a cable hose above the printer, you can’t see more cables. Only the circuit diagram of the mainboard on the underside of the printer is described.
Fast printing without ghosting must be possible. In short: yes it is! The speed is not limited by ghosting that occurs but by the possible printing temperature or the melting behavior of the filament. Technically, at least 300 mm / s are possible, realistically more real 200 mm / s are possible. Here, too, if necessary, I can’t get enough material melted without having to go up with the flow. The printing results are impressive.
The bed can be fixed with three or four screws. I recommend the 3-point assembly. As a first print I would not recommend the included lighthouse (in the Model File folder). That is in my opinion not meaningful. You’d better start by checking the extruder steps. The adhesion on the supplied bed is extraordinary. Forgives leveling mistakes (therefore very suitable for beginners). I tested the printer extensively with PLA, PETG and TPU. Everything is perfect. ABS shouldn’t be a problem because the “cage” makes it very easy to enclose.
A bench with a length of 8mm is no more a problem than a 25cm long cathedal. The extruder was a problem, but it was quickly replaced upon request. Is striking, that the bed temperature after heating is about 5 degrees higher than the specified. You should keep this in mind when slicing.
PETG held up very well at 60 degrees. (Otherwise the same filament gets at least 75 degrees on my glass plates. The supplied Bowden is very long, but can easily be shortened. Operation with the touchpad is simple. However, don’t be confused by the WiFi display IP address displayed, but this is a “placeholder” because the hardware is not installed. With the TMC 2208 on X and Y, the printer is pleasantly quiet. Thanks to the X-Y core structure, hardly anything vibrates. A tip: treat the top of the Z-axis with silicone oil, which likes to squeak.
All in all, I’m very happy with this 3D printer. The parts are very high quality and the print quality remains consistently good. I think the SAPPHIRE PRO will be my new permanent workhorse in terms of quality and speed.