Double indicator arm really helps tramming this kind of milling machines. Same procedure, first make the sideways rotation straight and zero the indicators. Now the tilt with the offset pivot point is much easier. Turn the head until both indicators show exactly same value.
If you're mounting something to the table itself then this is exactly how I'd do it but if your mounting a vise then I always tram the machine to the vise itself.
6:20 the machine has notches on the quill housing(above and below the depth screw) to use a square specifically for that setting. You don't have to use the quill like that. Likewise the same notches are used to set the nod too.
Nice to see that good old machinist know it all attitude in the comments. “Its not vernier” “i do it this way so this guy is wrong I’m better” Shit never ends.
Excellent Video! What about squaring the x-y table to the machine? In other words, how do you assure that the x-travel and y-travel at one extreme is the same at the other extreme?
I swing 20” and indicate 3 points’ 3-6-9 o’clock on the table. The table is 10” in Y. This gets you closer than splitting hairs in that radius. Once you have zero on all three points, your dialed 👌🏻 Old guy turned me on to this.
The red flag warning was in the beginning when you were leaning on the machine. Fully extend the quill. Why? To magnify the error from tilt vertex. Then proceed with a precision parallel. No need for that ring ding. Pay attention or pay cash!
Very true, the quill should be extended out for maximum accuracy. The nomenclature needs a bit of attention. There are no Vernier scales, just scales. The combination square has no ruler it is called a rule. - It is engraved to the ends. There are no rack and pinions, they are worm drives. The forward tilt is called the nod.
2:14 " so you can see there's a vernier scale for both dimensions" Nope, I can't see a vernier scale on either BECAUSE THERE ISN'T ONE. How did you get the job ?
I suppose for a technical college, that's good enough. Any students going on into the real world can learn later how to do it professionally - and using the correct tool.
