If you plan on experimenting with the E3D volcano 1.2mm you better be prepared to use a lot of plastic. I have gone through about 1.5 kgs of cheap PLA this week. I had a lot of trouble actually getting this nozzle to make good prints. I had to slow down a lot. Which defeats the purpose in my opinion. I probably just need more practice and more modding
My extruder could not maintain the set temperatures. I guess the plastic was pulling so much heat out of the extruder the heater cartridge could not keep up. Yes, I ran PID autotune. I even turned off my cooling fan (which was a bad idea) and insulated the extruder with fiberglass (muffler packing). My extruder maintained 220/250 degrees C. It is rather cold in my shop making the plastic spool cold. The 24V heater cartridge is probably a good idea. A mod I will probably be looking into. This is one reason I had to slow down my print speed.
Printing at 45-60 mm/s with 0.5 mm layer height does not give the plastic enough time to heat up in the extruder. Even though the extruder was 220 degrees, which is still hot for PLA. The parts would have that flat black color, and horrible layer adhesion. I think for this nozzle the heater block needs to be longer to allow more time to transfer heat into the plastic. Again, another reason to slow down.
I found that printing at 20-25 mm/s with 1 mm layer height worked the best. Although it had horrible layer adhesion, the large print in the picture printed in 3 hours with these settings. I was also successful printing at 35-40 mm/s with a 0.5mm layer height.
Warping can also be very very bad. But this can be overcome easily. If you print the first layer with a brim at 8 mm/s at 250 degrees, You will need a jackhammer to get the print off the bed. But it wont warp
corner curling? Not sure what to call this. Just had to slow down. https://drive.google.com/open?id=0B9bHWj4YsPejeC1KSHQ1MmJBOWc&authuser=0
One thing worth noting. When a print does go right, it is incredibly strong.
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R. Kyle Gress
gMax Technical Support
3D Printing/Electronics Enthusiast