Unresolved Gcode Question

OK, if the lines on the sides are the primary problem (the ribbing) have you tried this on another R1 (not the +, an R1) or was it another type of printer entirely? Some Z ribbing is actually 'built in' to the R1 (which is why the R1+ happened) due to the couplers and Z rods. However start with looking at the suggestions in the link. I don't think the Z ribbing was that pronounced. You can see it here on the forum by looking through the older Z ribbing posts like this one (where he actually fixed it too) : http://community.robo3d.com/index.php?threads/honest-critisim-on-z-ribbing.6890/

 

Pictures here too: http://community.robo3d.com/index.php?threads/z-axis-ribbing.6710/

 

It is not a crisis if you get it wrong and pretty easy to test on-the-fly to make sure it is right (the Z steps)
If you have leadscrews I would install them. You know the default threaded rods can cause this effect (maybe not to this degree, hard to say). If you really want to pursue it as-is sanity check that the couplers are both tight (on both ends). If one gets loose it will make the problem worse.

 

Given what you've been through so far, I'd be more willing to bet on it being the Z banding. Some folks had it more extreme than others. The R1+ has been out long enough that we tend to forget that this was ever a 'thing'

 

Gear ratio is irrelevant (direct driven)
your motor step angle is 1.8 (200 steps/rev)
Microstepping is controlled by the RAMPS and should be 1/16
Post a link to the leadscrews and we can get the threading/pitch/etc and run it through the calculator.

 

So 400