Hello all,

I recently built a Prusa i2. I'm trying to print the pieces in the attached picture, but the quality is sub-par. Do you know why the pieces are so rough and uneven?

I'm printing with ABS, from 220-235 on the prints in the attached picture. The different temperatures didn't seem to make a large difference, so I feel like it must be something with the printer. I use Cura and Pronterface. Any insights would be greatly appreciated. Thank you.

Check to see that the hobbed bolt is clean. Use an exacto knife to clean the grooves. Also, make sure the extruder idler is tight when printing. If you are using the default setting for retraction, you may be getting some slippage which may cause your hobbed bolt to clog up with filament.

Have you carefully calibrated the e-steps yet? And correct nozzle size set in cura? looks like it is over-extruding, some of those layers are quite thick.

Bit more details about your setup would help. Hotend setup (bowden/direct), nozzle size, layer height etc.