Giant 20' x 3' x 2' router build

[Blackrat]

gotta say that looks pretty good !

to locate the board ....

you have to have references cut into the foam block from the top side ... this is because the block is not accurate enough to flip over and carry on cutting

so instead of cutting the whole of the top of the block, id cut 6-8-10 (as many as you need to support the foam block) square patches into the block ... then when you flip the foam block over these machined patches locate onto the table by mean of MDF pieces that are the same size as the patch that was cut

hope it sorta makes sense :D

what software you designing the board in ?

[charlieuk]

That does make sence and is a good idea I have been thinking along similar lines but drilling some large say 1" dia holes in the table then using the cnc to drill some matching holes in the blank and using a large dowl to locate. Like you say it would be nice not to have to worry about the block being perfect. I guess I should try both and see

[Blackrat]

yup, thats exactly what im getting on at .... dowels in a blank that locate on the table sound good ... maybe machine round patches into the foam , and have the blank circular in shape

[Blackrat]

summing like that ?

[charlieuk]

Not sure I quite under stand ?