Corners and circles are not good

[jheikkila54]

Hey Guys!

New to 3D printing, new to the MakerFarm i3v, new to the forum, and loving it all. I bought a MakerFarm i3v 12" from a local who had built a month ago, claims he didnt have time for it, my guess is he was tired of chasing problems, and there are/were many. After using my buddies 3D printer to replace/upgrade many parts, a new nozzle, and LOTS of alligning/leveling, I think I have it printing fairly well (in comparision to how it was running.)

I have 3 issues left, and I think 2 are related. Circles are not circular and 3 out of 4 corners are over shot. My first thought is the belts, the y-belt seems fairly tight, the x-belt seems fairly loose. I also think that the top layer looks a little funny, like the nozzle is to close or to warm or something. I have included a couple pictures to help show the issues.

I currently have the following upgrades printing to replace tonight, unless others have better ideas or think it is another issue:
https://www.thingiverse.com/thing:796250
https://www.thingiverse.com/thing:790207
https://www.thingiverse.com/thing:612584
https://www.thingiverse.com/thing:359773

I appriciate all the help I can get! I am hoping to have this fixed by the end of the week as I should have all the hardware for the the Itty Bitty Double Flex extruder, and would like to get the printed parts printed.

[AbuMaia]

Circles are not circular and 3 out of 4 corners are over shot. My first thought is the belts, the y-belt seems fairly tight, the x-belt seems fairly loose.

I think you've nailed it.