Odd question: I have z banding but only on one side of my prints.

Odd question:

I have z banding but only on one side of my prints. Specifically the right wall if I was to print a cube. The other three sides are completely fine but the one always has bands. The line up with the pitch of my threads on my two acme rods. Is it a bent rod? I have rigid couplers and no inserts at the tops I I don’t see an issue there.

Do you have an open printer? I had a similar issue and realized that the printer was getting a draft on one side - leading to banding. Placed a large cardboard - and the banding vanished.

Problems on one side are almost always cooling issues. Check for drafts or see if a fan shroud that circles the print would work.