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  1. #1
    Join Date
    Jan 2019
    Location
    Torquay
    Posts
    3

    Default Mill head adjustment (Tramming)

    G'Day All,

    I have a ZX-40A Mill which I am slowly getting to grips with. Just been a matter of finding time in between customer jobs. I decided I need to tram it in as I want to be able to surface Motorcycle cylinder heads etc. using a fly cutter. The mill has a tiltable head on the Y axis so getting that square was not a huge issue. Without using a dial indicator I got that to 1.5 thou over 10" using a feeler gauge. The X axis is another matter, I appear to have a difference of 7 thou over 10 inches.
    As far as I can see there is no adjustment for the head in the x axis.Tramming Mill copy.jpg
    Anyone been down this path and have a solution for me?
    Thanks, Alan
    PS: If anyone knows how to post these images the right way up that would be good too. My apologies. AlIMG_8016 copy.jpg
    Last edited by Grahame Collins; 18th Nov 2019 at 09:07 AM. Reason: Photo rotated by Mod

  2. #2
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

    Default

    Hi Ozzyal,
    Welcome to our MetalWork forum.
    Can I suggest that you go over to the Welcome wagon sub Forum and introduce yourself?

    https://metalworkforums.com/f300.It Helps the rest of us to see where our latest members come from.

    Take the time to have a good look through the all sub forum.Go to the FORUM box.From the drop down selection choose Forum Home and from there you can scroll down and see all the different sub forums we have plus the forum Rules right at the top. We do expect members to read these TOUs -Terms of Use which
    determine whaat the forum owner expects of us.They are fairly typical for most other Forums.

    You will find a bunch of highly skilled and knowledgeable folk here who are eager to help one another.


    If you need to post a pic,please note that the first ten posts (pics) are moderated. Nothing to worry about ,it is the way the anti spam software is structured.

    If you post a pic and it is not visible in a day or two I have probably missed it, so just PM me and tell me where it is - ie what forum, and I"ll sort it.

    Videos are different with vids and U tubes going in to the applicable forum. Your personal videos or personal U tubes need to go in in the Members Videos section.
    To have a look at all the sub forums we have, go to the LH top corner and click FORUM.


    If there anything about the forum you need to know just ask.

    Welcome again.

    Grahame

  3. #3
    Join Date
    Apr 2018
    Location
    Drouin Vic
    Posts
    633

    Default

    G'day Alan, others with much more experience and knowledge may chime in with a contradictory answer but I get the impression you already have an inkling of the answer which is that without a 'nod' adjustment built into the mill the only way to adjust that angle is by changes to the mounting between the head and the column, dodgy way would be with shims but the proper way would be grinding and scraping. Even if you were to shim the mounting of the head, you may well find that the error is actually in the relationship between the column and base, so that the table falls away from the head as you crank it out from the column.
    The good news is that you can get away with what you want to do, by having a flycutter with a diameter that will sweep the surface in one pass, and do the machining in the X axis (left - right) without stepping across in the Y axis (in-out).

  4. #4
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    6,443

    Default

    Hi Guys,

    I added about 2.5 thou in shims under the top pair of column fastening bolts to push the head back about 5 or 6 thou. Aluminium cooking foil works well for this !
    Best Regards:
    Baron J.

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