Can't cut squares

[WillAdams (William Adams (Carbide 3D))]

First, is the machine mechanically sound? All tighteners fastened? If you put a probing pin in the spindle and push/pull on it, does anything move?

If the machine is mechanically sound what material are you cutting? Using what tooling at what feeds and speeds? To what depth? If cutting deeper than half the endmill diameter, recommend adding offset geometry and cutting as a pocket down to tab height or the penultimate pass:

Best Bit for full cut through

One which has a cutting flute length equal to or greater than the thickness of the stock — pretty much any tool should work. Big thing is the toolpaths — if cutting out, rather than just cutting a slot: [image] Offset to the outside by endmill diameter plus 10% or so: [image] [image] [image] Then cut as a pocket: [image] down to tab height or the penultimate pass: [image] then move the contour down to below the pocket and start cutting at the bottom of the pocket: [image] and…