Alu hextrudort, Dragon HF, CHC 0.6mm, getting odd extrusion pattern

Should be visible in the pictures. The lines are not smooth lines, but look like it's repeatedly pausing briefly during extrusion. It makes no unusual sounds or anything. Any ideas? That's the top layer pictured.
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like-gold
like-gold11mo ago
Apparently this was down to a clog in the CHT nozzle.