Having an issue and not quite sure how to proceed. After printing a test print (checking for electrical interference on this thread: Striping on prints) which showed that the heater was causing stripes, I printed the same test piece again, but with the heater on at half strength the entire time. That print was the first print I have had fail in months prior to this, and even though they were quite solid, they didn’t hold together. The prints were with Grey NEX resin at power level 52. With this resin I never had any problems with burning the PDMS. I had run liters through it, and I scrape it clean every time to make sure it is clean, unscratched, and nothing is sticking on it. It was very close to pristine. The next print I did was a few miniature figurines. This was also a failed print (much of the print peeling off of the build plate), and it was surprisingly delicate… easily breakable. Seemed to be underexposed. When I looked at the build plate afterwards, after this one print, there were big areas where there were very opaque burns in the PDMS where the figurines use to be. This is from a single print…
I am trying to figure out what happened, and if anyone has a clue as to why prints are now failing. I am able to print the ring pattern at 52 power, but it seems a bit weak, as well, and the supports fall apart to the touch. I printed the four pillars to make sure it was level, and they were all within parameters, but tended to break off at the shoulder between the base that connects to the build plate and the pillar portion.
I am wondering if it impossible for the laser to go bad? It clearly still does fire, but I suspect it may be underpowered compared to how it used to be. How do I test this? I switched build plates to a new one (shipped directly from Peopoly) and tried moving power to 59 and using black Peo resin, but I got only a small amount of polymerized resin on the build plate and some in the resin tank.
Should I just up the power to 65 and see? Is there a way to check the laser? The Machine has been well used and has probably over 500-1000 hours of printing. Could it be the laser power module? Do those go bad?
I checked the mirrors, as well, to see if the clouding issue occurred again-- it has not, as far as I can tell.