If you want exact dimensions to model them let me know and I can measure some I have here.
I would like to add that in terms of precision welds, I am most likely going to be taking the parts to a machine shop where they will have all the nessesary jigs and fixtures to avoid distortion if i were to tackle this myself. The ideally make the holes for the rails ever so slightly larger than required to give some wiggle room :)
04-06-2014 #43I would like to add that in terms of precision welds, I am most likely going to be taking the parts to a machine shop where they will have all the nessesary jigs and fixtures to avoid distortion if i were to tackle this myself.
Epoxy does most of the rest,
I can't really recommend an epoxy as I haven't used this particular technique, but as I understand it does need certain properties for it to work..
Firstly, to be clear - I'm not talking about the method used on this build:
My First Router, Built in Steel - Page 17
The method I'm referring to is the one where once the frame is assembled/welded, a couple of channels are built onto the rail bearing surfaces (the channels don't need a bottom as the surface of the frame will serve that purpose) these channels are joined by a bridge (probably more than one, which will - of course - need a bottom). Once the frame is reasonably level and the epoxy is poured in, the bridge(s) ensure that the epoxy on both sides of the frame sets at the same height. Once everything's hard, take away the channels/bridges, scrape away the meniscus and voila - parallel, same height rail mounting surfaces.
A few folk on here have used this method and will be able to elucidate further.
Last edited by Wal; 04-06-2014 at 02:23 PM. Reason: Added info.
This is my frame in my works...you can see the epoxy on the top...my problem us that I was a numpty and was rushing and got the mix wrong so its not hard enough.....
Sent from my Galaxy S5
Last edited by njhussey; 04-06-2014 at 07:08 PM.Neil...
Cool guys, How deep are those channels? Epoxy can be very expensive...and sueply you'd only need a couple mm max!
Can you guys please point me in the direction of linear guider off 1000mm x 600/700mm please :)
Seems not many people know where to find em
>Cool guys, How deep are those channels?
They don't need to be as deep as I've illustrated 'em - I think 2mm would be under-doing it a bit - mix too little (or if the frame's level is slightly off) and you're maybe gonna end up with bald-spots... I'd calculate for a 5mm thickness of epoxy and don't forget to make the channel wide enough so that the resulting strip of epoxy supports the full width of the rail.
That's about the extent of my knowledge regarding this technique - someone will be along soon to better advise!
Last edited by Wal; 04-06-2014 at 07:25 PM.
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