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Posted by Ignoramus7760 on July 22, 2007, 1:08 am
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Updated pictures here
http://igor.chudov.com/projects/My-Bridgeport-Mill/Adjustable-Machine-Feet/
I welded those feet that I made, onto the mill's movable base. While
one stud became hard to turn, none became stuck. It was the first one
that I welded. After some thinking, I realized that the decision to
weld along the whole length of the bar, was wrong. I welded the rest,
with four 1" long welds, along where the nuts are attached (most rigid
areas). Remaining ones were not stuck at all.
Then I used a 12" Starrett precision level to level the mill. The
level turned out to be very sensitive. After about 45 minutes, if not
more, I finally got the mill leveled. It was a "step forward, two
steps back" kind of procedure. But finally it worked.
At the end of leveling, I realized that the mill was only standing on
three legs, with the fourth not touching the ground. Very
embarrassing. I then slid a piece of paper inderneath that leg, and
gently lowered that leg to the point where the paper just became
firmly stuck underneath it.
I verified that the mill remained true.
i
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Posted by Carl Boyd on July 22, 2007, 6:47 am
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Iggy
It look's good, but I was surprised to see the end of the adjustment screws
directly on the concrete rather than on some kind of steel pad.
I would worry that with just the end of the allthread resting on the
concrete and nothing to "spread the load" vibration during operation will
crush the concrete and you wil constantly be re-leveling. It looks like
there was some spalling just from the initial leveling, That may have been
part of the reason it took 45 minutes to level.
Carl Boyd
> Updated pictures here
>
>
http://igor.chudov.com/projects/My-Bridgeport-Mill/Adjustable-Machine-Feet/
>
> I welded those feet that I made, onto the mill's movable base. While
> one stud became hard to turn, none became stuck. It was the first one
> that I welded. After some thinking, I realized that the decision to
> weld along the whole length of the bar, was wrong. I welded the rest,
> with four 1" long welds, along where the nuts are attached (most rigid
> areas). Remaining ones were not stuck at all.
>
> Then I used a 12" Starrett precision level to level the mill. The
> level turned out to be very sensitive. After about 45 minutes, if not
> more, I finally got the mill leveled. It was a "step forward, two
> steps back" kind of procedure. But finally it worked.
>
> At the end of leveling, I realized that the mill was only standing on
> three legs, with the fourth not touching the ground. Very
> embarrassing. I then slid a piece of paper inderneath that leg, and
> gently lowered that leg to the point where the paper just became
> firmly stuck underneath it.
>
> I verified that the mill remained true.
>
> i
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Posted by Gunner Asch on July 22, 2007, 12:33 pm
Please log in for more thread options On Sun, 22 Jul 2007 10:47:51 GMT, "Carl Boyd"
>I would worry that with just the end of the allthread resting on the
>concrete and nothing to "spread the load" vibration during operation will
>crush the concrete and you wil constantly be re-leveling. It looks like
>there was some spalling just from the initial leveling, That may have been
>part of the reason it took 45 minutes to level.
>
>Carl Boyd
No pad? No...I didnt look at the pictures.
Pad is 100% necessary! 1/4" may not be thick enough as it may over
time turn into a bowl. 3/8" minimum strongly recommended, with a
shallow depression for the levelers to rest in.
Gunner
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Posted by Ignoramus23517 on July 22, 2007, 3:10 pm
Please log in for more thread options wrote:
> No pad? No...I didnt look at the pictures.
>
> Pad is 100% necessary! 1/4" may not be thick enough as it may over
> time turn into a bowl. 3/8" minimum strongly recommended, with a
> shallow depression for the levelers to rest in.
Gunner, i will definitely put it on pads when I find something
suitable. I appreciate your word of wisdom.
i
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Posted by Gunner Asch on July 22, 2007, 5:01 pm
Please log in for more thread options On Sun, 22 Jul 2007 14:10:31 -0500, Ignoramus23517
wrote:
>> No pad? No...I didnt look at the pictures.
>>
>> Pad is 100% necessary! 1/4" may not be thick enough as it may over
>> time turn into a bowl. 3/8" minimum strongly recommended, with a
>> shallow depression for the levelers to rest in.
>
>Gunner, i will definitely put it on pads when I find something
>suitable. I appreciate your word of wisdom.
>
>i
Just stuck some 3/8" plate under the levelers..they really dont need
to be more than 3"x3". Some misc. scrap would be hunky.
Gunner
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