Carve King 2 fine tuning

[Dennis]

I purchased a second hand Carve King 2.  It was fully assembled, but barely used.  The previous owner only made a few test cuts.  Looking at the machine and bits that came with it, it is obvious there was little, or no time logged on this machine.

So, I got it up and running, made a bunch or carves.  I started out with Easel and graduated to Vetric Vcarve Desktop.  As I get into more advanced or more technical carves, I am finding that the machine is not "square", for lack of a better word.  I have done a few v-carve signs and I am noticing some misalignment is the cuts relevant to the Z axis.  

I have probed the bed in various locations, I have found that the base is not flat.  For instance, if I probe in the upper left call that 0, then probe the other corners and midpoints.
0           +.012     +.016

-.007                  +.010      

+.002    +.012    +.016


I am on ~1/64 inch, pretty good if I am using my table saw or hand plane, not so much for a CNC machine.  Or am I expecting too much from this entry level CNC?

I have read through the assembly manual and verified all connections.  The manual does not say much about adjustments or fine tuning.  I have searched the internet and not found any relevant guides.  Is there a resource for tuning the carve king?

I have also tried to tram the machine, anther internet search.  What I found is that the spindle is off about 1-2 degrees (tilted to the right). 

My questions are:
Do I have unrealistic expectations for the precision of this machine?
Is there a guide to help me dial it in with in its limits?

Thanks for any help that you can give me.

Dennis

[tbyer]

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[MillRightWes]

There are a few things you can check. Make sure the frame is not tilted slightly, or the extrusions for the bed are not lifted. There may be some free fitment with the holes on the frame letting the arms higher up not be parallel. You can also check the Y extrusions to make sure they are not high in the frame hole compared to the other side that might be low in the frame hole.

The most likely problem is the bed sections themselves. MDF is not uniform across the sheet, much less between two different sheets. You may have to set up a spoil board that is decked down to be flat to the router.

To tram the router, you will need to shim the router in the mount.