I’ve been building a cartesian printer with a single z rod (printrbot simple style) and getting this uneven side wall, i have check from :
step value,
putting some anti backlash spring,
putting the right layer height value
printing it slow, 20mm/s
but none of those seems to work
any suggestions? thank you!
What material is it?
You could check:
He’s right. tight tight tight belts. And tight tight tight zip ties on x, y, and z bearings all absolutely critical.
The speed doesn’t have to be slow I print at 60-100. Are you certain the filament is high quality (it is if it is ours 
I print out PLA at 195-200
Regards
Vrook
my belts twang like guitar strings. Any tighter and I figure it will rip apart the plastic extruder.
I agree with @Daniel_Wood , check extruder temp, gear tension, filament diameter. If belts are loose, they feel sloppy, so that’s a really quick diagnosis
left edge on first photo is because slicer starts printing perimeters with slower speed then inside perimeters and accumulated pressure of filament blobs out.
overall this print looks ok, I think there might be some wobble either from construction or belts - if you are referring to horizontal lines
Thank you all for the tips.
the print improve after I tighten belt, but still a sliight inconsistency.
Now im suspecting a wrong e step value on X-Y axis since its outputing a smaller box on XY axis.
could entering the wrong e-step value also affect this?
Cheers
E step generally means extruder steps. So are you saying that the x is fine but the x and y are wrong? If so by how much. The steps per mm should be a function of your mechanical parts, I.e., teeth power pulley, motor steps per rev, and micro step settings. If it’s off my hundredths of a mm, you probably need to calibrate your extruder, which would be esteps, temperature, and filament diameter settings
Oh Im sorry what i mean is my step for X-Y is off, its printing a 31mm cube that should be 35mm.
what I want to know is that, can a wrong step value create this inconsistent wall problem?
since I have learned that a wrong Z value can create a rib effect.
regards
A wrong step value should simply scale up our down the x or y size of everything. It’s as if you scaled the entire part… which is literally what it’s doing now that I realize it
