Router 'lifts' on x-axis when moving
I had set up to plane a new spoil board I noticed that after I aligned the cutter to just touch the high point of the spoil board. Then I double checked it by running the x axis the full length its travel. What I saw was that when moving to the right the cutter just touched the spoil boar at it highest point, just as it should. However, when I moved the x axis to left the cutter was about 0.03125 higher than it was when moving to the right.
Any ideas or thoughts on what might be causing this? I have attached some picture of the axis to give a reference of what I have.
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Custom 24x24 MDF, 1/2-10 5 start,425 OZ KL steppers, KL-4060, C10 BOB, 48v PS. VCarvePro V7, LinuxCNC, Craftsman 1.75Hp 1/4" router.