I'm in the sign industry & bought the open build's lead 1515 thinking that I could put a 4'x8' sheet of substrate on the router, cut half, shift & register the material & cut the other half ( I have done this on other CNC routers)... Two problems.. 1st problem is It didn't occur to me that the X access was limited to 46", but not a huge deal, I can work around that. The second problem I would really appreciate some suggestions... On some of my 4' x 8' sheets, I need to create V cuts most of the way through so I can fold the material & have seamless corners, which means the table needs to be perfectly level... but the router won't level a 4' x 4' area , let alone the bed size, it leaves a lip... Any ideas of how to create a bed that will hold a 4'x8' sheet & keep it level to the router? I tried placing a sheet of 3/4" maple plywood on top of the cutting area and it still was way too far out of level.. I really don't need more than 1" of z clearance. Thanks
Put down a actual working envelope sized 1/4" piece of MDF on top of the main spoilboard. It's small enough to surface completely. Deck it off with the Surfacing wizard to be perfectly true. Make sure machine is square and trammed first. Or, surface the main spoilboard, then knock off the unwanted edges in more conventional ways (hand held power plane, sander, etc - doesn't have to be perfect, knock it down just a little below the surfaces section)
