Help Needed: Weird wobbly lines

Just did a test cut, and I’m getting these wobbly lines in some spots around the edges of the work surface. 8x12 anchor positioning, 4x8 plywood sheet. Any ideas?

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You can play around here to get a sense of which limitation might be the one you are seeing:

How does the tension in the belts feel when this is happening?

That looks like some of the trouble I had when I had too much friction between the spool gear and the holder. Pulling everything apart, sanding, and lubricating with paste wax solved things. You can look at some of my early posts for pictures of the issue I had.

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