I manufacture sight pushers for auto pistols. Most of my designs require a series of holes drilled on the centerline of 1-1/2" bar stock. In reality, the same sizes of steel and aluminum are several thousandths different in width. When mating the two, the holes really need to be centered.
Anyway, I have a Grizzly 1007 equipped with a DRO Pros glass scale 2 axis DRO. A friend who is a professional machinist helped me set it up. We tramed the table and the vise and found it to be durn near perfect. Out less the than .001 for 360*.
When I use the DRO to find center I use an electronic edge finder mounted in a collet. When I drill a hole, I also use a collet. I'm still ending up 10-15 thousandths off center.
Any idea what I'm doing wrong?
I want to talk to you. I am a gunsmith and most of the sight pushers are not what I call "good or universal". I have spent well over $1000.00 on pushers and I still don't like what I have. Please text me at 336-325-6938. Thanks, Phil (Ustawuz)