Yet another guy tries to fix his Sieg SX2 looseness

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velocette:
Hi to all
Sharing Info from another forum for those interested in X2 column improvements

http://www.homemodelenginemachinist.com/f28/mini-mill-spindle-column-alignment-5337/

or

http://www.homemodelenginemachinist.com/f28/reducing-mini-mill-column-flex-column-y-axis-alignment-5401/

masses of ideas here for those interested

Eric

superc:
:bugeye: :worthless:

Check the height of your column nut when on the bolted down mill before drilling the plate. On the drawing I posted it shows as 3.25. However, I just measured the actual height on my own SX2 mill and from the bottom of the mill to the center of the whole is 3.68" That's a whopping difference!

:Doh:

superc:
Also someone else advised theirs is 3.5 to the column nut center, so this means the height of the x2 bases are not consistent which translates to measure, measure, measure.

superc:
:update:
Although I don't seem to need it, since I did go to the trouble of cutting the T out of a heavy plate for use as a column backstop, I decided to go ahead and place the column hole. I clamped the plate down and drilled the 15/16 hole.

You can't see it, but there are some 1" blocks under the plate to keep the drill from marring the table upon penetration.

I have more plates, so if I messed the placement of the column bolt hole up, I would be real angry at myself, but would somehow cope. After I had drilled the hole as a quick test I slit the plate over the column bolt without taking the M24 nut off. I am pleased to report I got the column bolt hole placement exactly right and the plate fits perfectly on my mill.

The next step, if I decide to proceed past this point would be to drill holes in the short leg of the T, and corresponding holes in the base which I would then tap and of course holes at the top of the plate and into the column, again which I would tap. I am thinking short pieces of small steel pipe could be used as spacers for the bottom bolts. In any case, from my perspective the hardest part was making sure the column bolt hole went into exactly the right place.

I am not happy about the idea of drilling and tapping the base, but now that the column backplate can be placed against the column the holes can be located then drilled in the backplate, then the backplate itself used as a guide for locating exactly where the holes should go in the base and also as a tap guide/block to aid in hand tapping the holes in the base.

RussellT:

--- Quote from: superc on February 24, 2014, 12:53:18 AM ---
I am not happy about the idea of drilling and tapping the base

--- End quote ---

If you're not happy about drilling and tapping the base why not use the holding down bolts. You could make a plate to go under the base with tapped holes under the lugs and fasten that to the plate you've already made.

Russell

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