I'm having a roll-up problem where the Carver carved to the letters and then rolls the wood up at the edge of the letters Plus carving seems to be less detailed on optimal than usual. Seems to me I'm getting a irregular death issue as the bit goes across the wood and I have been using a sled but it does the same with just a regular piece of wood. It has changed my sanding from about 10 minutes to over an hour and I can't figure it out. I posted a couple of pictures so you can see what I mean.Click image for larger version. 

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Maybe a z truck encoder problem?