I switched from Simplify3D to Cura early this year when I also switched to a 0.6 ruby tipped nozzle and have been happy with it up very recently, perhaps when I updated to 5.3.1. I am having an issue with my first layer lines not being connected for the most part anymore. I have tried all kinds of changes with initial layer line width and flow percent, trying up to 115% and not had any luck changing it. It almost looks like it starts out with proper flow/width/squish then tapers off on each pass, but this only seems to effect the first 1 or maybe 2 layers and the model doesn't matter.
I don't believe there is a clog in the nozzle as the rest of the print comes out fine, my manual start code lays down a line that seems to be fine and my code for loading new filament runs fine with a nice clean extrusion. It doesn't look like the nozzle is clogged or off, but before I order a new one I wanted to check if there is something I am missing settings wise.
This is printing on a Maker Select V2 frame but the controller is a Duet 2 WiFi, Flexion extruder and a magnetic build plate among other mods.
I started looking at this last week when I had my first real issues in many years using this printer. One of my prints shifted about 10mm only on the Y axis about 7mm from the top. I thought maybe something odd happened so I tried the print again with the exact same results. I decided to finally print a different belt tensioner to see if that would make any differences and had a similar Y axis shift but this time about 20mm at about 2.5mm height. I checked the z-axis, y-axis and all the screws and everything was good. I then re-printed the same tensioner gcode and it had the exact same shift at the exact same place. All of the gcode previews look fine though. I did hear some skipped steps as it happened, sounding like it was trying to drive way faster than normal but I haven't had a chance to step through the gcode to look at the speeds. I have a new y-axis motor to install but it just seems odd that 2 different models have had the same issue at different heights, but at the same heights within their given model. On the first one I had resliced it before reprinting as I had made some minor changes to the design by repositioning a couple of holes.
Thanks
WDI3_xyzCalibration_cube.3mf