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Thread: Squaring a VF2 and Vf3 table?
01-18-2012, 02:17 PM #1
Squaring a VF2 and Vf3 table?
We have a vf2 and vf3 at work, and when we put a granite square on the tables, they are out .003 and .006 over aprox 20". We'd like to try and adjust the tables, so we're looking for any advice we can get since I've never done it before, and we cant get a hold of the service guy that came in and did it last time.
I should mention, both machines are early 2000's.
01-18-2012, 02:22 PM #2
01-18-2012, 02:45 PM #3
We've actually already level'd both machines. We though that was the problem at first, but it turns out its not.
01-18-2012, 09:17 PM #4
Put an indicator in the spindle.
Move it to one corner of the table, zero the indicator. I also mark zero on the table with a sharpe so I don't get lost.
Move the table under the indicator to each corner and take a reading. Again I write it on the table.
As you adjust the feet the table will square up under the indicator, Just like your indicating a fixture in vise jaws, in this case you would use a shim to bring a corner up, or your dead blow to seat it better. Same principle. But now your shims are the feet on the machine.
Go slow, make a move with the feet, then check all four corners again. rewrite your new values on the table. Repeat.
Your total indicator reading should be .0005 or less, when you get there lock the feet down with the jam nuts, and recheck.
Level isn't important, it just dictates which way the coolant is going to flow in the bottom of the bed.
If you don't achieve the .0005 reading you run the risk of twist in the Y axis rails. This will cause premature wear or possible binding, both issue are not good.
This info was passed to me from a very knowledgeable Haas Tech sitting in the parking lot of the Haas factory waiting for parts just like me.
01-18-2012, 11:47 PM #5
Sorry guys, maybe I wasn't being as specific as I should have been. The table itself isn't out in the Z plane if you will. Its out in the xy plane. We have a large square granite block that you lay on the table, and dial it along the Y axis. Once its dialled straight in the Y, if you run the dial test along the X, its out .006 on one machine and .003 on another. So the x is out relative to the Y or vice versa.
We have ran a dial indicator along the top of the table, and its within .0002-.0003".
01-19-2012, 06:14 AM #6
Is this a granite surface plate that you are putting on the table?
01-19-2012, 09:50 AM #7
Post some pictures of your setup. Show how the block is located and how the indicator is held.
Are you sure the block you are using has perpendicular sides?
01-19-2012, 10:03 AM #8
What I am thinking is that the linear rails are not on perpendicular??
01-19-2012, 10:32 AM #9
01-26-2012, 08:20 AM #10
01-26-2012, 01:18 PM #11
Not much to update, we still haven't figured out how to square up the rails, but we haven't really had time to deal with it we are so busy. We've been using the machine to do work with large tolerances. If we get it figured out, i'll post up the solution for others.