Today I measured the different heights on my wasteboard with UGS and a bit of melamine and found a difference of up to 1.2mm in different places. I made a skim file in easel and cleaned off 1.2mm on a 75 x 71 cm square. It’s now much better,
BUT I got the washboard effect where the bit ran in the x axis, although it looks pretty good in the y axis direction cuts .I remember from another post (that I couldn’t find again just now) that this means the z axis needs a piece of aluminium can to shim the bottom out a fraction. However, in the meantime, Question 1 will the ridges have any effect on carving? I can see that the board looks much closer to level, i.e. the edge nearest my zero is now a bit over a mm into the mdf and on the far corner and back the bit barely scratched the surface. (This was where I was 1.2mm lower). Question 2, would rerunning the skim cut but only going up and down in the y axis on my free day of Easel pro make it smoother? Is there any point in that? Question 3. the mdf is now kind of hairy, would a coat of varnish (not water based) help keep it from sucking up humidity? Is there any point in this?
And question 4, if I do manage to tram it up a bit or re-run the cut, how fast could I run it as watching the skim cut while breathing in mdf dust was possibly the most boring hour and a bit I’ve spent this year. (I used an 18 mm flat bit, 1016mm/min, one pass of 1.2mm)
Thanks for any suggestions!