I have a TAZ v1 that’s happily printing along, but one issue it has had since the beginning is that layers always make these little bands that you can feel. This happens with ABS and PLA. The banding pretty much mirrors the Z-axis drive screw grooves, so I’m assuming changing the Z-axis is pulling and pushing the X carriage just a tiny bit each time. Does that sound right given the attached image?
Any suggestions on to to fix this? I do want to upgrade to the better Z-axis drive system of the TAZ 4 eventually, but I know my TAZ v1 can definitely do better until I get around to that upgrade.