I appreciate your response!
I releveled the bed and checked the Z axis 0 point. Those seemed to be in adjustment but didn't hurt to check.
I did discover that the Longer LK4 is a rebadged Alphawise U30. So, went into Cura and created a new printer and replaced the model.
That seems to have corrected the Z Axis printing in air issue.
The other strange thing is the way it prints models downloaded from the net. All the files included with the printer printed perfectly. No skipping while printing.
I've tried 5 different models downloaded and sliced in Cura and outputted as gcode. All skip as illustrated in the attached image.
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Guest maht
Could be an unlevel bed, or it could be that you need to calibrate your z offset from your bed. the z0 point might be a few mm higher than the bed itself.
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