One side lower than the other, Solutions?

[Big Man Black T-Shirt(Patrick)]

I just ran a Sharpie trace test and found that one side drives the Sharpie into the table and the other side it barely makes contact with the bed. 

(See photo below)

So what needs adjustment most likely, the X/Z carriage or the Y table?

Thanks!

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[Derek the Admin]

It's either one side of X rail too high, one Y rail higher than the other, or the bottom of each frame piece not being on the same plane (meaning if you sat it on a dead flat surface then the bottom of the left frame is higher than the front and rear, for example)

[Big Man Black T-Shirt(Patrick)]

Would that account for this odd pattern of dropout, though? It seems to be in part of the X and the Y both but not in other parts of the same axes.

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[kevin]

I'll leave the tech support to Derek, but your Screaming Chicken drawing reminds me how much I miss my Trans Am. Good luck on getting a solution.

[Derek the Admin]

I think it accounts for the preponderance of it, even given the odd pattern. Generally speaking, your right is higher than your left and the front is higher than the back. Some people just face a spoilboard off with the machine so the bed is (practically) coplanar with the tip of the end mill as it moves in the XY plane.

Edit for clarification:
by "right is higher than the left" I was referring to the plane of the bed.

[Derek the Admin]

Also, are you sure your paper was dead flat to the bed or spoil board? Might want to confirm that before you make any adjustments.