So, I have a second hand Lulzbot mini and I am still trying to get familiar with the printer. First, I do want to ask opinions on calibration/what to check since it’s second hand. Secondly, I am puzzled by a recent experiment I performed. I printed 12 20mm test cubes and recorded their actual dimensions with calipers in excel. My goal was to find an average dimensional error so I could determine my printer’s accuracy (eg: my printer can print to +/- 0.15mm). Instead, I found that my printer was pretty consistent but not accurate. My X axis was biased too large while my Z is biased too small. It might be easier to take a look at the screenshot I attached to see what’s going on. I’m curious if this is normal, just my printer, all lulzbot minis, or if there is something I can tweak physically or in software.
I appreciate the help. Thanks!