The Shop > Tools
WM14 Mill spindle issue/adjustment
RussellT:
13 thou is more or less the same as 0.25mm as mentioned in your first post.
Are the z axis gibs tight and both swivel bolts tight. Is there anything in between the swivel mounting faces?.
The surprising thing about this is that the axis of rotation is right.
Russell
picclock:
@RusselT
I've known about this issue for a number of years, and have set up the spindle axis of rotation to be true to the table. I have put a 5 thou ( I think - was a long time ago) feeler gauge shim at the top of the head to correct a small y error which was present without it. However, this corrects a 2thou error across the table width and has no bearing on the gross error or quill issue. At the end of the day if I need to get get the spindle/quill concentricity issue sorted. I will post pictures of the spindle accuracy to the bed for any 'unbelievers ??' when I have the machine in a state to do so. Even if the gibs were lose, which they are not, I always lock the Z axis when working and that jams the gibs into the column. Swivel bolts would only affect the x axis not the Y, and they are tight. I used to tighten them so much I stripped the lower locking bolt thread and had to make a new one - I think I modified a set screw for the purpose. Either way all very tight.
Best Regards
picclock
Arnak:
Hi Picclock,
I would talk to Warco as they are very helpful and may have come across this problem before.
Martin
modeldozer:
hi Picclock,
Had the same problem with my Wiess equevelant of the ML18 and the problem was with the back face of the head where it mounts to the slide, where it moves to tilt the head. Had to take off the head and scrape the surface true to the spinle axis. Not a very easy opperation as the head had to come off various times to scrape, refit and test and repeat.
Cheers.
Abraham
RussellT:
Hi Picclock
I was asking about the swivel bolts and gibs because if they were slack then the head could droop and then lowering the quill would tend to move it toward the column.
I assume your shim is in the gap between the swivel faces. That does explain this a bit. I couldn't understand how the axis of rotation could be right.
If it were mine, I would take the shim out and see what the quill did then. I would first want to get the quill moving vertically and then tackle the axis of rotation which I think will need the spindle stripping.
Russell
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