Torsion LR4 table generator

Here it goes! Table time!

48x96, 1.5” Overhang, 2 inch buffer on rail, 6 inch table thickness, 3/4ish thickness

Ignore the 100mm y axis cut and the mess in the top right. Im still learning lol

Maybe I’ll get super lucky and the 100mm cut i did will be BETWEEN boards…I know, no chance

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You really should cut and install your struts before you start cutting out parts like that in the middle of the beam.

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Oh, yeah, I totally agree (sorry to kill your buzz!), the twist in the gantry can really mess with parts.

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:sob: I’m not sure if I should stop it and basically rebuild the machine? Thats kind of why I didn’t put the strut plates on…it requires to start over

Sorry boys, with this luck Im going to finish the table and then strut plates. The 100mm mistake landed right between the parts!

I take full responsibility if it doesnt work out without the strut plates.

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I’m sure it’s in here, but I can’t find it and I want to confirm before I secure things. Since one side is about an inch longer than the other, which side of the X-spar gets the conduit rail?

Conduit rail goes on the shorter side (you can figure this out by thinking of the machine at each extreme. The non-conduit side has the motor – so the offset is larger than the conduit side.)

I hope it works for you!!

Why does it require you to start over??? You cutting the parts out like that are most likely going to mean your parts aren’t accurate. The machine will be ok at the extremes where your temp struts are but it will be a limp noodle in the middle.

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It’s relatively easy to pull the core by loosening the top clamps on the braces and sliding the top rail over, then walking the core off. This provides plenty of access to install the strut plates without a complete teardown.

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I figured as much, but I was starting to second guess myself as I get to final assembly and making my head spin.

Thanks for the help and the tool.

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I can get 18 mm MDF, what bit diameter would I need/want for 18mm MDF?

EDIT: I have two bits, 1 that is 3.175 mm and 1 that is 6.35 mm.

Both work well. I think they are just about the same speed as well, you can push a 1/4" faster but it has to remove twice as much material. Lately I have been using the 1/4" more often.

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A dumb idea I got yesterday…
I won’t be cutting the whole table, but the generator may still help….

Small template/helper for the rail clips and belt holders

The idea is to used this with 2 thin strips of MDF - like a plinth - as a guide to drillthe holed, and use the plinth as “rails” to align the machine on the table

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Looks like it’s working…

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Any ideas on the y clip distances?

Maybe this should be added to the temp struts.

I love this idea.

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I just finished installing the Y belts and this method really makes things a lot simpler and error-proof

  • Grab 2 plinths (or directly on 2x4 on the sides of the table…)
  • Mark and drill the holes at both ends
  • Mark and drill Y clips holes
  • Install the “XMax plinth” screwing through the parts and marked holes
  • Align the “XMin plinth” relative to the inner side of the Xmax plinth
  • Same thing, screw through the holder into the marked holes
  • Shoot a few brad nails through the xmin plinth along its length

I think the template can be a bit improved because you need to flip it to do the xmin side, which is not really clear by the markings
Also it won’t give you the spacing between the last Y clip and the ymin holder as-is

Don’t know if it would be better to just have multiple thin card printed or a single template with different sides…

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I’m thinking about using this generator to put torsion box on top of new bench @vicious1 created from OSB. Two big projects, but before I commit - who already generated this torsion box and how it went? I mean cutting and assembly?

I love the idea of the template! It was difficult to do when having no previous experience.