Epoxy granite vertical mill build log

[routercnc]

Would the blocks fit on a lathe cross slide to drill the holes using a bit or boring head in the chuck?
Or the other way around with the block rotating on a lathe face place and bit or boring head in the tailstock?

[Nick]

Quick update

That was a great idea with the lathe cross slide although I couldn't quite get it to work, having issues with its size. I ended up getting a mag drill... Drilled 60 holes and tapped for the insert bolts.



Mould made and epoxy poured, all 150kg of it. Got it done in about 90 minutes with two of us. Had some slight issues, no vibration, we ran out of pigment towards the end and the mould blew out on one side. But overall went ok, if anyone wants more details on how to go about this I could write a more detailed post / video.



Will probably de-mould tomorrow.

[Nick]

It looks bigger out the mold

[Chaz]

It looks bigger out the mold

Lovely. Keep at it ....

[Nick]

Small update

I've made a temporary stand and put the column on the base



I don't have a square big enough to see how perpendicular it is. Has anyone bought a granite square ? the only one I can find is this one
https://www.zoro.co.uk/shop/measurin...MaAg9CEALw_wcB

I have been making slow progress with the table, I have reduced the table width to 240 mm and I've got two ground 25x50x1000 mm bars to use as the rail mounts.

The table "offcut" from reducing the table size width has been cut into four and scraped flat and parallel to act as spacers. I was starting to scrape the table flat but the carbide came off my scraper...



I am slightly concerned that there isn't enough support under the steel bars and they will deflect. You can see this in the renders below, with the overhanging steel bars and the small amount supporting epoxy granite. I'm thinking about adding some threaded rod or increasing the thickness of the epoxy, i'm not sure if this is necessary though, thoughts on this?