I've new to metalworking and haven't really done much until I bought a mini mill (Seig X2 variety) about a month ago. I've been having a number of accuracy/positioning problems with it though that I narrowed down to this simple example:
I put a drill chuck in the spindle and a piece of flat scrap stainless clamped to the table atop a 123 block. I lock the X & Y tables so they can't move. I load a #1 center drill into the chuck and drill a shallow hole (around 1/16 deep). I then raise the head, put a wiggler with a needle point in, turn the machine on and get the wiggler spinning straight by hand. I lower the needle wiggler down to the hole and it is very obviously not lined up with the hole I just drilled (by about .015 to the left). The X & Y slides were locked the whole time and I didn't lock the Z axis at any time nor engage the fine adjustment at any time.
It doesn't seem to be an issue with play in the vertial column. I tried moving it up an down and playing with it a lot while testing like above but it doesn't move by anywhere near .015.
Is it possible for a wiggler to be broken or defective in such a way that can be made to spin straight, but it is not spinning coaxial with the spindle? Is there anything else it could be? To my untrained eye the whole wiggler doesn't look right. The body of it wobbles back and forth as if not concentric (machine spindle is fine though) but the tip can be made to spin perfectly straight and it was like that when I ordered it brand new.