SAJ Test

thingiverse

I wanted to boost my overall printing speed, but I couldn't find any test that would show me when I had gone too far on settings. So, I created this one - it prints fast, uses low material and shows what I think are the most signs of speed excess. Things that govern overall speed are: Acceleration, speed rate of change Jerk, speed "jumps" for short movements Speed, which is actually max speed. First make sure your belts are well tightened; if you don't know how, Google it. Also, check that all your printer's bolts and nuts are tight. It will be a good time to check that your bed and carriage move smoothly, again Google. If your printer has EPROM enabled, you can change accel and jerk from Control-Motion. If not, you'll need to modify your firmware - for Marlin 1.1.8 in Configuration.h Jerk: #define DEFAULT_XJERK 20.0 #define DEFAULT_YJERK 20.0 Accel: #define DEFAULT_ACCELERATION 1200 Also, you will need to configure speed from firmware. Another thing you may need to change is temperature - I ended up printing at 235°C in order to reach 120mm/s. You should look for layer miss aligning and ghosting, also missing layers and extruder skipped steps. Also, you may notice that when you print too fast, your prints will lose gloss. If you overstretch with speed, you may end up losing layer adhesion. In my case with my crappy but heavily modified Geeetech Prusa, I went from: 60mm/s printing and 80mm/s travel 20 Jerk 1000 accel to: 120mm/s printing and 150mm/s travel 30 Jerk 2000 accel Print quality decreased a bit, but print time went down by about 40% for large prints. Now the problem is noise jajajajja