Originally shared by pave_spectre
With my Printrbot simple about as calibrated as I can make it, I figured I would give something at lease mildy interesting a try.
So I downloaded this Android figure off Youmagine.
What you see here is about the fourth try which is mostly not a failure.
I think if it weren’t for the fact that the print bed slopes with respect to the y axis then the end result could have been quite respectable.
Due to work commitments however my printer is going to end up neglected on shelf for the next two months or so before I can even look at trying to replace parts/rebuild to correct its flaws.
And chances are it’s problems will be exacerbated by the damp air by the time I get back to it.
What problems do you have? Calibrating x, y, z and e is a good start. It’s easier than most think. Tight belts is a must too.
Also, if you don’t have a sensor, adding one will solve any sag, but just tightening zip ties works well too. You can adjust the bed or even shim it to help the y sag in older models… We also have an upgrade kit to fix all of these issues 
it adds belts, sensor, aluminum Extruder and bed. It’s nice.
Good luck!
Brook
Calibration took all of ten minutes once I knew how do it, and even with issues the resulting print was miles ahead of my initial print at first assembly.
The major problem is y-axis sagging. Based on some testing I have already done, tightening cable ties will get me part way to solving the misalignment, but there also appears to be some slight warping most likely due to moisture from my cruddy evaporative air conditioning over the past year.
The current situation is perfect alignment at the front of the bed, and about a 3-4mm gap at the back of the bed. Cable ties will get me to about a 2-3mm gap at the back.
I have seen the various upgrades available and am quite tempted :-D, but as it’s just going to be sitting on my desk unloved for a while, they will have to wait.
