Please help: keeping MFT flat on wavy floor?

John Stevens

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Jan 16, 2007
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Ahh, my wavy basement floor.  It slopes in two directions toward the sump in the corner, dropping as much as an inch over four feet.  Back when I kept my jumbo MFT stationary, I had six leveling feet on the cabinets underneath, and that was that.   Now my space is much more cramped and I need to be able to move the table around on wheels.  The base for the table top is a typical workbench-type thing made of four 3x3 oak legs held together by dimensional hemlock studs that I jointed and planed flat and square.  The long sides are about 42" and the short sides are about 39"  On the uneven floor it twists like it was made of cardboard.  I want it to stay dead flat.

Okay, I shoulda known better before I built the thing, but I was in denial.   ::)  Now here I am, looking like a jackass and toying with three possible solutions--

(1)  Mount the whole thing on a deep torsion box, but then I'd need to cut down the legs, too.  A fair amount of labor there.

(2)  Run plywood braces in an "X" pattern between the legs, with the edges of the plywood running vertically.  The legs are about 20" tall, so the plywood could also be 20" tall (except, of course, at the edge lap where the pieces would cross in the middle).  I think that would be pretty strong, but I've never tried anything like it, so I'm not sure.

(3)  Ditch the short sides of the base, treat the two long sides like a pair of trestles, and join them together with a plywood box like a cabinet, but without a door--all screwed together.  Reinforce the box inside sorta like a torsion box, but about 36" x 36" x 20" high.  It would be pretty easy to screw the long sides to the faces of the box.  How well do you think the box would resist wracking?

Your thoughts?  Many thanks in advance, folks.

Regards,

John
 
John Stevens said:
......  The long sides are about 42" and the short sides are about 39"  On the uneven floor it twists like it was made of cardboard.  I want it to stay dead flat.

Your thoughts?  Many thanks in advance, folks.

Regards,

John

John,

It sounds like you need some leveling pads like these

Scott W.
 
Hi, Eiji and Scott.  Thanks for the suggestions.  I may go that route, although I think with that solution I'd have to manually level the surface of the table each time I move it.  Certainly with the Lee Valley product, and if the ENCO product works like the self-leveling feet on my washer-dryer combo, then same with that.  IOW, the ENCO product will ensure that four feet remain in contact with the ground even if the ground & the four points are not coplanar, but won't ensure that the four feet (and what's attached to them) lie in a single plane.

Regards,

John
 
Here is a set of casters/levelers from Bench Dog. They are pricey at $60 a set but may work well for you. I am in the mddle of making an MFT base and I don't plan on getting down on floor to level out. I will run the threaded rod right up to the MFT and work it from there. 5/16 rod and couplers will do it for me. They will couple with the leveler on the other side...not the caster side.

fes-ca4.jpg


The partial story is here:http://www.woodshopdemos.com/fes-cab-1.htm
 
.....and on the 8th day He made shims..... :o

OK, so shims arn't shiney or sexy or high tech, but they are cheap and get the job done.  I marked my floor for my TS and I know how much I have to shim up the two legs when I move it out to use.  Wrote the measurements on the legs.

Steve
 
To add to Steve above,  I too use shims.  I mark the floor for saw placement, and have small blocks (shims) cut and attached to the table saw legs with small chains.  No thinking involved, and I can't missplace the shims. 

Dan
 
Dan Rush said:
To add to Steve above,   I too use shims.  I mark the floor for saw placement, and have small blocks (shims) cut and attached to the table saw legs with small chains.  No thinking involved, and I can't missplace the shims. 

Dan

Awww, what a GREAT idea!  I'm gonna do it!  :D
 
downtheroad said:
Saw this idea a while back and was thinking of using it on a worktable. Anyone see any negatives?
mobile base caster idea

Hi, guy.  I actually have made two of those, one for my table saw and the other for one of my old jumbo MFTs.  They work fine if the top is rigid and flat, like the table saw, but not so well if the top can flex, like the MFT.  If it can go out of level, it will, over time.  You can always pull or push it back to level and then lock it in place with little bolts (I didn't check to see if the wood mag model has them, but I made mine that way), but then you've either got to accept the level of accuracy you can get by eye, or you get out your level or laser or winding sticks or what have you, and then it's a tedious process, IMO.

I'm looking for a way to keep the top flat even if one leg is hanging up in the air.  I don't really care if I use a wedge or shim or adjustable foot after that.  I think I'll just suck it up, make a strong torsion box with real wood and epoxy this weekend (I'm tired of MDF torsion boxes that warp after a couple of years' heavy use) and be done with it.

Thanks to everyone for the ideas.  I definitely appreciate learning about all the different options for raising the legs up off the floor to compensate for the difference in floor height.

Regards,

John
 
woodshopdemos said:
I will run the threaded rod right up to the MFT and work it from there. 5/16 rod and couplers will do it for me.

Wow, John, even with all the other good suggestions here, that one really stands out.  Need to order some more stuff from LV this week, so I might see if I can adapt your idea to the LV legs Eiji mentioned.

Regards,

John
 
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