It is horrible what you are having to suffer. I know the feeling — you have so much work to do, but now you are getting bogged with machine failure after failure and endless repair cycles.
After having made the investment, it is probably best to just hang with Bambu Labs and let them replace your X2D printer.
The X2D was very tempting to me as it is ridiculously low priced and loaded with features for a dual nozzle printer. However, all that comes with exponential increases in complexity for its mechanics, electronics and workflow — and huge increases in mass (weight) on its printhead.
I thus decided to stick with my fleet of X1E printers since I do enormous amounts of full lifecycle work in rapid development, where a product has to go from concept to fielding in weeks — and to just observe what new users of the X2D are encountering.
Even with the X1E being the pinnacle on the X1C engineering and an absolute workhorse for printing engineering grade filaments as easily as PLA, my transition to them was not without the exact agony you are experiencing — and the root cause turned out to be something very small that the technical support (which is through the domestic vendor on the enterprise models) could never resolve.
Essentially, what was happening, was the X1E printers would each shut down, like clockwork, on achieving 850 hours of printing with PAHT-CF or PPA-CF.
The customer support was extremely responsive and would express ship to me new power switch assemblies and then new circuit board assemblies after the replacement power switches would also not resolve the problem, which would recur on the same precise milestone of 850 hours elapsed printing PAHT-CF and PPA-CF.
My entire lab looked like an X1E assembly line. With half the printers running, and the other half in various stages of disassembly for parts replacement — and my still living with the 850 hour time bomb ticking away on each X1E printer. You can imagine how stressful it was to have to redesign my lab workflow for production around the cascading 850 hour mean time between repairs metric.
I finally had to take the problem resolution into my own hands and deep dive into the electronics myself with testing gear. I pinpointed that it had to be a failure in the circuit elements of the power switch itself after exposure to the high, 60 deg F chamber heat needed for printing the carbon fiber reinforced polyamides.
Having gone through 40 of the ones supplied by Bambu Lab and receiving agreement that the vendor would accept returns on the X1E equipment for replacement with new units, I ordered new power switch assemblies from Amazon from a maker I knew had a proven track record for designing them for reliability in high temperature environments.
These things were very affordable too. I bought 50 of them for only about a dollar each.
Lo and behold these permanently resolved the mysterious X1E shutdowns.
Can you believe it was a $1 part that was the Achilles’ heel of the vaunted X1E all this time? I suspect you will discover something similar to your challenges with your H2D.
Now, here’s the thing I wanted to look out for on the H2Ds that work reliably — what losses in agility / print speed are realized with its massive print head?
I had a colleague that acquired the enterprise edition of the H2D and we did a runoff using my favorite “benchy” which is not the iconic “tugboat” but a model I designed of a condom (195 mm tall) to the exact industry average dimensions, but to be printed with 0.4mm walls and foaming TPU. One to be printed on the X1E and one to be printed on the H2D Pro, and then compared — for flawless walls (no blobs or zits) and overhangs, ability to be rolled up like a real condom and without breaking or tearing, and passing the water test of being inverted, filled with water, and looking at leaks through the walls.
Guess which printer pulled it off and which did not? The X1E sailed right through the condom benchy and passed every post test. The condom benchy printed on the H2D Pro failed on every post test.
There are things that the X1E with its light and agile print head and carbon fiber guide rods can achieve, requiring speed with finesse with extremely sensitive printing materials, that the H2D simply cannot achieve with its much heavier print head and rail system.
,The P2 X2 are still in their infancy stages.
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