Best posts made by Zimm

Ok to start I have a Creatbot D600 Pro that I have now upgraded with a Duet Wifi and duel E3d Hemera extruders. All calibrated to E3Ds spec and running perfectly except for what I can only describe as a consistently inconstant print problem. See attached photos. my prints end up with a consistent banding through them. At first I though it was a Z hight problem but on closer inspection the banding changed depending on the distance printed per layer so there for it had to be an extrusion issue. Yesterday I printed a large prototype for a client and I noticed the problem on a large base layer. Also see photos. I can not find anything on the net to explain this problem. Has anyone had or seen this issue before?!