Ultimaker 2 prints much faster though, the link below shows the stats the American company claims for its Copperhead printer.
Does this mean the Copperhead 3d printer will have better printing resolution than the Ultimaker 2 or are their more variables that account for print resolution?
As Valcrow wrote, there are other factors to consider... The positioning precision is certainly good enough on both UM2 and Copperhead. Using 5 micron layers is far from meaningful - you'll probably seldom use 50 microns. What comes to x/y precision, Copperhead's advantage might be its smaller nozzle diameter - the positioning itself is again more than good enough on both. However, smaller nozzle means slower prints and more risks for clogged nozzle.
I didn't find any information on Copperhead's feeder and extruder designs, but I noticed this on their printer manual:
"Temperature for the first layer should be 180 (PLA) to make the first layer stick. Other layers are lower than that around 175 to 170."
To me, combination of 0.3mm nozzle and 175C temperature with PLA sounds quite unrealistic.
In general, the printer seems to be "work in progress". When you look at their time lapse video on YouTube (on max resolution), the result doesn't look very impressive to me:
Entering their forum requires registration, so I couldn't see how active it might be. You'll need an active community to support you, as none of the 3D printers is really free of (quite) some quirks.
I understand the need to look for numbered statistics when you're shopping for a new printer. Most people do including myself. But once you get to play with one, you'll realize soon that it's almost irrelevant. There's no way to really know if the stated precision is practically achievable or even remotely accurate. The table it sits on has more influence on the print quality than the 0.8 micron on paper difference.
I always recommend to people to look at examples of prints online (not from the company). Prints don't lie. I couldn't find much on the copperhead which makes me a little weary about their claims but they could just be too new.
I think the biggest quality factor is how consistently every subsequent layer is put down. The layer resolution and XY precision, not so much. You could get really nice prints at 0.12mm/layer printing relatively slowly to ensure consistent layers. A far shot away from the 0.02mm/layer marketing would like to tell you.
Peruse through here to get an idea of the stuff UM people are making:
If you have specific things in mind that you intend to make with it you should post here, and someone here will have an example for it I'm sure.
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