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Stilldrillin:

--- Quote from: bogstandard on March 16, 2009, 07:12:57 PM ---Remember this, that bolt is forever gone. The scroungers are everywhere. :lol:

http://madmodder.net/index.php?topic=894.msg6120#msg6120

--- End quote ---

 :lol: :lol: :lol:    :clap:

Darren:
John S,

Bolt arrived this morning, looks perfect. I shall fit it later and then I can get on with tramming and stuff....... :ddb:
Many thanks for sending it, really appreciated  :thumbup:


Bogs, a quick question, with your old miller did the tramming alter when you changed height settings. Or did it behave and stay true?

bogstandard:
Darren,

I didn't alter the tram on mine because it was so close, it didn't need it. When I checked it, it was only about a thou out over a 6" split in the X axis, the Y was perfect, so I left that on, as it gave a wonderful superfine back cut when fly cutting right to left in the X axis, and the Y axis cuts were well within expected tolerances even though it was slightly out in the X.

If the column is straight and true, and you shim it up to give a perfect tram in both directions, then there is no reason for it ever to go out of tram.

What I would suggest is carry out your tram and adjustment, give it a little time to settle in, say a week or so, then recheck, just to see if it is remaining stable after a bit of use. Mine never altered all the time I had it.

If it takes a few hours to do, then do it to the best of your ability. This is an important part of getting your machine running correctly. Don't take the 'that will do attitude with it'. Time spent getting it right will be repaid many times over in accurate results from your machine.

Because I expect you to only be doing very minor adjustments, even that brass shim I gave you might be too thick. You should really use shim steel for doing the job, but if you only need very thin shimming, the average cooking foil is only 0.001" (0.02mm) thick, and that hasn't got much compression in it at that thickness, so would be fine.

John

Darren:
Thanks John, that settles my mind somewhat as I had visions of the tramming going off when the head height was adjusted.

I don't think it can be far out as I tried a bit of flycutting and it did a light back cut that seemed quite neat.
Also the QCTP I made is perfectly sq on all sides, mind you that could be the shaper except I didn't cut every side with the shaper.
All the same I got a surprise when I put a square to it.

I will get to the tramming shortly. But it will have to be the bent bar method for me.... :(

bogstandard:
Darren,

The bent bar method is all you will ever require with this mill, just for initial set up.

You only go for a tramming tool when you have an articulated head or column that gets changed occassionally, and as you know, yours is fixed.

Best of luck with your straightening exercise.

John

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