Require help on measurement please

[devonwoody]

Thanks Chris, I've got that in mind when I go out to the cold workshop this morning.

I kept those dummy run bits so I should be able to knock up a jig.

 

[woodbloke]

how would you go about doing that Chris? Out of Interest

I'd make a simple cradle jig to hold the box so that the joint was touching the surface of the table saw, then run it over the slightly elevated blade, using the fence as a guide. It would only take a few minutes to make the jig I envisage.

If you want to do this, I'll try to make a sketch of it.

Chris - hope Scrit's not reading this 'cos you've got to take off the riving knife to do that - Rob

 

[wizer]

Thanks for the explanation Chris.

DW if you go down this route i'd be interested in seeing a pic of the jiggery.

 

[devonwoody]

OK here how I made the jig.

made sure the blade and mite frames were square.

Got a piece of scrap (again from the skip 5 years ago I knew it would come in handy one day.)

made the jig and then ran it over the blade. (riving knife on the triton is still there, but splitter removed)

Six slots cut at corners satisfactorly.

AND THEN DISASTER,
Tapping the stringers in with pva glue it broke the box apart, I think the pva expanded the stringers because I dry fitted each one before starting glue up.

So what can I do now?

Very little surface timber to glue to and they have a dry coating of pva & superglue.

Has it got to go in the scrap box?

 

[StevieB]

DW, can you get a biscuit in there, or possibly a loose tongue if you rout a slot in each side?

Steve.

 

[Lord Nibbo]

If you glued it to the base one section at a time each time you fitted a section you have ony one joint to worry about untill the last section of course then it's only two joints, would this not be easier?

 

[jasonB]

You could put the sides back into the chopsaw and skim 1mm of each end and try again.

I would fix the top & bottom before adding the inlay to the corners, as it will give the structure some strength.

Jason

 

[devonwoody]

Went back in this afternoon (crawled in) and then did this as an experiment.

Not fixed, just playing around. I think to rechop and get perfect lengths might turn me from white hair to ???????

Anymore ideas welcome.

 

[Anonymous]

DW

I think your wood is too thin to get any stronger joints where the ends meet. I would cut a base from MDF or ply to avoid movement and then glue that in to provide strength to the joints

 

[devonwoody]

An Australian friend suggested this advice for future gluing up of hexangonal boxes.

Quote


When I glue up the hexagonal boxes, I lay the sides out end to end outside up, and stretch a couple of pieces of masking tape across each end. Put glue on all ends, then close it up and stretch tape across the remaining corner. Check that all the diagonals are equal, and push them in a bit if necessary. A big rubber band cut from an inner tube can help to clamp it together if necessary.

Hope this helps,

Alex