fv-320t Mill

[Ian PParticipant @ianp]

Posted by Graham Meek on 31/03/2013 10:31:13:

With the milling head just nipped up vertically you need to perform the following task, many will fight shy of doing this task at all costs, why I do not know, but once you have mastered it you too will wonder what all the fuss is about.

 

Gray

I know what all the fuss is about! ! ! !

I know the theory, I know the practice, I know the principles, I know how to do it, I've got the equipment, and I've done it, The problem is not the fuss, its just how long it takes!

You hinted at one of the problems (things change when the bolts are tightened) but tapping with a mallet, the palm of your hand, a fist, or whatever is not a precise science and sods law dictates that the one point where the the two halves of the head are in alignment gets skipped over every time a small movement is made.

The whole process boils down to trial and error and to get the best result needs a lot of luck or a lot of time. The last time I went through the procedure I spent a full hour before I decided I could not get it any better. The worst thing is that I know that no matter how tight I make the two 'T' bolts the alignment might be disturbed if a cutter jammed or I took too heavy a cut.

Ian

Edited By Ian Phillips on 31/03/2013 15:24:55

[Ian PParticipant @ianp]

Gray

I'm not lacking in experience (of tramming/aligning) but the sheer inconsistency of the trial and error process becomes very challenging.

On my machine the other complication is that to correct a head 'nodding' error I have a 0.07 shim positioned at the lower third of the head rotating joint.

Because of the difficulty of getting the spindle vertical I doubt I would ever tilt the head to do a particular machining job, I would look to find an alternative way of milling at an angle.

Ian

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