Bambu Lab H2D AMS 2 Pro 3D printer in test – Two nozzles in long-term perspective

1 - Introduction and technical data 2 - Assembly 3 - Comissioning 4 - Elektronics and features 5 - Test prints 6 - Summary and conclusion

Electronics and features

With this 3D printer, Bambu Lab has reached a new level of complexity that is not usually seen in these devices.

Before you can even take a look under the hood, there is a whole army of different screws in the way.

The lockable exhaust air system, power supply unit and mainboard are located in the rear part of the printer. The air pump is located in the large gap at the bottom right of the laser version.

The many sensors, relays, switches and other components have to come together somewhere, so the board has a correspondingly large number of connections.

The H2D is so packed with functions and intelligent little things that I can’t possibly list everything here in a reasonable length. I will therefore limit myself to what I consider to be the most important or most frequently used features. For example, I found the LED strip underneath the print bed practical so that I could see the progress at a glance as I walked past.

Bambu Lab also offers an optional “Motion Accuracy Calibration”, which requires an 82 Euro Vision Encoder.

In my before and after tests, I did not notice any significant improvement because the printer already delivers very accurate results out-of-the-box with a deviation of less than 0.10 mm. I therefore consider the extremely exaggerated illustration shown here to be more of an aid to justify spending money.

With older firmware versions, a message with hard results probably also appeared at the end, but this no longer exists. I also find it very strange that you can’t run a calibration, turn off the printer, run a recalibration and then get a large gap between the dots again. How can that be?

Perhaps it makes more sense to use the plate if the printer has already had a few thousand hours behind it or in combination with the laser attachment, but I would simply save myself the money.

However, the “High-Precision Nozzle Offset Calibration” makes more sense and, thanks to the built-in cameras, is possible without any additional purchase.

This ensures that the distances are correct when printing with both nozzles. I didn’t have any problems with this ex works, but I have heard from some users that a run-through was necessary for them.

An integrated camera with full HD quality is also available, which automatically creates time-lapse recordings and lets you check the progress. The video quality is good, but please bear in mind that I have cropped the recordings shown here and re-encoded them in a smaller file size.

Here we see another thermal image taken at a set temperature of 60°C, on the left an image immediately after reaching the target temperature and on the right after 10 minutes.

And here again for the maximum possible 120°C bed temperature. Overall, the uniformity is quite good, but if you give the printer a little time, it is of course even better. Nevertheless, the 120°C are not reached. The images were taken using the GOYOJO GW340 and with the print surface applied, which can distort the measurements due to reflections.

Thanks to the integrated installation space heating, warping can be avoided with ABS, for example.