General Table Question

[Greg J]

Gerald,

I'm getting ready to weld up my table and I noticed that some people have bolted connections for the cross bearer (10 10 302) to the main longitudnal beam (10 10 320).

The plans call for a welded connection. I prefer the welded connection, but my table is approaching 500 lbs (226.8 kg). I was actually wondering how J.R. moved his table outside for painting, when it occured to me that the cross bearer channels were missing.

Anyways, bolting the channels makes life allot easier, but won't the table "rack" (go out of square) over time? Is yours bolted? Is there a unit in operation that has bolted connections? (you get my question :))

Greg

[J.R. Hatcher]

Greg don't forget you've got a 4' X 8' sheet of MDF with 40 bolts that is going to hold everything square. I measured the diagonals on my machine and the difference is about 1/16" so I'm out of square half of that or 1/32". That's more accurate than most framing squares. That's my take anyway, But then I'm partial to a bolted frame so.......

[Greg J]

Good point J.R.

I'm sure I'll be visualizing it tonight.

My channels will show up next Tuesday. But, I'll start welding up the sides and legs (2" x 3" x .120" thk rectangular tube) tomorrow night (and you thought you had fun on a Friday night :)).

Time to start "wrapping my head" around this part of the project.

Greg

[GregW]

Just a quick question. What should the over all table size be to cut a full sheet (4' x 8') of plywood with the least amount of waste? Thanks,

[Bill McGuire]

Greg...
1 inch more and you can cut melamine (97" X 49"). You might want to think about the extra inch... just in case.

[Gerald D]

Greg W, have you looked at this thread?:
http://www.mechmate.com/forums/showthread.php?t=63

[GregW]

Greg...
1 inch more and you can cut melamine (97" X 49"). You might want to think about the extra inch... just in case.

So, Bill have you built one of these machines? If so, what are the dimensions of your axis? I can make this just about any size for the standard cuts of plywood and particle board here in the U.S.A. Some plywood sheets come in 4' x 12' pieces.

[GregW]

Greg W, have you looked at this thread?:
http://www.mechmate.com/forums/showthread.php?t=63

I'll read through it but I'll have to get out my metric to imperial measurement converter. :D

[Gerald D]

. . . . . . but I'll have to get out my metric to imperial measurement converter. :D

Is that what you wanted us to do for you?

[GregW]

Is that what you wanted us to do for you?

Oh no, it was a joke. :) I even have a tape that has metric on one side of it. I guess I'll do some more reading and then build so I have an over-run of about 6 inches all the way around. I won't be using the 12 foot sheets of plywood any way. Not much call for something that long.

[Gerald D]

In that thread you will see that I have already allowed for a 2 inch overun all around.

[GregW]

In that thread you will see that I have already allowed for a 2 inch overun all around.

Thanks Gerald. That would be enough. Thanks. No need to have too much table.

[turnerseng]

What size steel is used to make the rails. I have looked on 10 10 246 but cant see the size???

[Alan_c]

Its on the small drawing upper right corner 60-65mm x 6mm equal angle, most of us have used 60x6.

[turnerseng]

Allan
What drawing no. or page no on which download. I still cant see it.
It must be because of the blur from the weekend- knocking the stormers out always gives me a kick. we owed you one remember.

[Alan_c]

Be nice, or I wont help :p

Part 4, Page M1 10 110 M

[Marc Shlaes]

OK... is this Cricket or Rugby or Football (soccer)?

[Alan_c]

Rugby, we're very passionate about it here, remember we are the World Champs... and our Cricket is not bad either.

[ghostlx]

hello to all , This is my first post to your forum. I have been readin for a couple of days and working on the table for my machine and have a question.
#1 :) would someone be so kind as to review the drawing that i have made to see if my table is correct and that i have not misenterpeted any of the dimininnsions as they are a little confusing. i just want to make sure before i start to cut the steel.
thanks
ghost

[Gerald D]

From your picture, I can see your Y dimension is 1830.

From 1010302S, the cross bearer must be Y + 420mm, which is 1830+420=2250 and not equal to 2208.

From 1010300W (top right), the width of the welded table is Y+430mm, which is 1830+430=2260 and not equal to 2222

The X dimension is missing, so there cannot be comment on whether the 3160 is correct?

[ghostlx]

thanks gerald my x length for the table is 3160
yello is mdf 10 10 123
red is 10 10 302
magenta is 10 10 310 which is a length of 3160
thank you very much I will adjust for dimn. you gave to me
thanks
ghost

[Gerald D]

Ghost, you don't seem to understand how the "X" and "Y" dimensions work? You need to figure this out for a couple more drawings . . . . . .

X and Y are the dimensions of the MDF on the table. The total length and width of the steel table is quite a lot more than the MDF.

[ghostlx]

yes i understand this , and i thank you for your help
so for pc. 10 10 320 its oal should be x (2750 + 600= 3350) so that would make me 190. short on table length
thanks so much
ghost

[Gerald D]

That's it! You got it now! :)

[sailfl]

Gerald,

I know some where there is a drawing that talks about the location of 0,0 on the table. Looking at drawing 10 60 100, where is 0,0 located? Looking at the top figure in the drawing, is it located on the left or right side opposite the cable chain?

Or point to the drawing or thread.

Thanks

[kaartman]

Hi Nils
Have a look at drawing 10 10 300 WA, on drawing 10 60 100 top drawing I see 0,0 right far side of the gantry and bottom drawing left X rail far side of X rail,I use the X cable chain as reference.
Ragards

[Gerald D]

0,0 is generally taken where 10 10 300W shows it (dankie Koning) and that puts it furthest away from both of the cable chains.

However, you can decide to put your 0,0 where you like. My machine destined for home will have "strange" things like 2 y-motors under the gantry and a single x-motor on top. My 0,0 will nearer to the lower cable chain side, which will still be called the x-chain although it will flex when the y-motors run . . . . . .

[isladelobos]

Hello, i seeing the plans and this are my conclusions.
This is OK?

Total Y table is --------------> Y+430mm ¿+30mm rack? Total:460mm
Cross Bearer ----------------> Y+420mm
Cross Granty Member tube ---> Y+500mm
Main Beam ------------------> X+600mm or X+500mm

Thanks.

[Gerald D]

Total Y table is --------------> Y+430mm ¿+30mm rack +12mm welding errors, or 34mm rack with 8mm welding errors? Total:460472mm
Cross Bearer ----------------> Y+420mm if welded - allows 5mm weld space each end - Y+430mm if bolted - then level with beam outside
Cross Granty Member tube ---> Y+500mm Correct
Main Beam ------------------> X+600mm Correct . . . . or Y+500mm ????

[isladelobos]

Thanks Gerald.

I calculated that I need steel for the table.

I need two 6 meters Main Beams for a 3050mm x 2050mm table.:o