Hi Dustin,
Thank you for your suggestions. Currently, I'm using CURA 5.5, which features enhanced speed profiles for the Ultimaker S Series printers. These profiles reduce print times and if I am not mistaken one way they do that is by speeding up infills. However, the issue I'm facing was also present in CURA 5.4, which I believe predates these faster profiles. However if nothing else works I will revert to an older CURA version or reduce the print speed manually.
I have previously adjusted the feeder tension to both 3/4 and full, starting from the assumed default halfway point. Unfortunately, this adjustment hasn't had any impact.
Today, I updated the printer's firmware. While I'm certain it will not resolve the issue, it seemed worth a try. Additionally, I've cleaned both print cores and replaced the bowden tubes for print core 1. I've left the feeder tension at 3/4 for now and I'll conduct three test prints at the temperatures of 200°C, 210°C, and 220°C and will update you on the outcomes.
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Dustin 160
The gaps look like one of a few things.
Printing too cold on the extruder (or too fast)
Feeder tension not set correctly (guide: https://support.ultimaker.com/s/article/000002935)
Print core needs cleaning (guide: https://support.ultimaker.com/s/article/1667337928445)
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