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  1. #21
    JAZZCNC's Avatar
    Lives in wakefield, United Kingdom. Last Activity: 14 Hours Ago Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 5-6 years. Has a total post count of 5,880. Received thanks 915 times, giving thanks to others 37 times.
    Quote Originally Posted by reefy86 View Post
    slap in the face lol. thanks dean :)
    Was not my intention to slap ya mate.! . . . . I'll keep stum if you like.?

  2. #22
    I slapped my own face for being dumb I meant lol

  3. #23
    update :)

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  4. #24
    I love this forum. Had planned to make my x cars for the gantry in a similar way. After reading this I have to rethink to ;)

  5. Or all this is just an indication that at the end you fill finish with too much spindle Overhang on gantry. My criteria is that in a good design, when looked from side, the bit should stay in the bearing spread or the sall called gantry side legs. Or at least not be too far in front of it. I don't see what you will be saving here? 5cm of rail?
    project 1 , 2, Dust Shoe ...

  6. #26
    you mean keeping spindle bit more or less as centre to the bearing blocks or centre to the side plates as much as possible?

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  7. I mean D4 to be so long /260-300mm/ that router bit stays inside it. Its called -overhang/ how far from X rail is the spindle nose. There is center of gravity also. The nearest the bit to the center of gravity, the better. Ideally all should be designed so that is perfectly balanced .

    you could read basic info about forces there

    But you could do it out of this concept as you like, if using Hiwing 20 rails and carriages. They are so strong that overhang is not a problem. Just i like things to be perfectly balanced and engineered

    project 1 , 2, Dust Shoe ...

  8. The Following User Says Thank You to Boyan Silyavski For This Useful Post:

  9. #28
    thanks boyan, from spindle nose to x axis is 151mm, d4 as you describe is 215mm.


  10. #29
    im hoping im slightly correct but are these images right?

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  11. Hi, just answered your PM but could not upload pictures there. Just saw what you have posted as images .

    In short - NO. Dont despair, but this is not right. You will figure it out :-).

    Lets see:

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    This is how its the right way:

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    Look at the ideal/ my machine is on the extreme side so not necessary so much / but hence is nice for illustration:

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    Also this is the correct way, i would say the perfect way for the Z plate, so its naturally reinforced by the rails and the plates at the back and

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    And finally, design so much travel and space brackets so that at lowest position of Z axis the spindle still reinforces the Z plate. Ignore that the spindle is small , because its small one 0.8kw and Z axis real travel is 180mm . NOrmal 2.2kw or 3kw spindle is much longer. This just to illustrate eventual max. Position:

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    project 1 , 2, Dust Shoe ...

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