Hi Guys,
I have one of those Chinese 6040 machines and I made a spoilboard for it which I then levelled however I still get variation. I tried making circuit boards and in some areas of the table the variation is quite significant. My PCB was around 15cm wide and it was taking a decent chunk of material on one end and then pretty much not even skimming the surface at the other end. This is WITH the spoilboard. What am I missing? Why do I have such a warped work area even after levelling?
I have done quite a bit of work from large 12mm sheets that cover the whole work area and in some areas the 12mm depth of cut makes it all the way to the spoilboard, in other areas I need to cut the piece out with a knife. It's not a massive cut mind you, it's not like I have to cut through a mm of material, probably no more than 0.5mm but still, that's quite a lot especially for PCB making. (I did manage to find spots on the table where I could make PCBs without a problem)
Why is a levelled spoilboard producing such results?