Azteeg X5 GT on Smoothie stuttering/odd behaviour

Hi there. I have an Azteeg X5 GT running the CNC firmware from smoothie.

Everything connects wonderfully in Lightburn and the fire button works as expected based on the % input.

Where I am having trouble is that when I start a cut (I’m testing a simple square shape) the laser head will operate normally for the most part but will occasionally just come to a near standstill (and the power output does not lower) and creeps along for 5 or ten seconds before resuming normal speed.

I’ve been playing around with the Smoothie config and I am finding that reducing base_stepping_frequency lower seems to help improve but not totally eliminate the issue.

Any ideas or thoughts on what would be causing the dramatic slowing of the tool head?

Thanks.

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