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spindle is chinese 1.5kw aircooled

originally part was too big for small cnc, so i gave a shot on this one, and boy was i impressed ;)

and just for comparasion, second video is with conventional milling (0.2mm DOC with multiple passes)
what's really interesting is temperature, with HSM i barely cooled the part (with air), and it...

i've just recently play with high speed toolpaths and achieved great results

here is a video of milling steel with not so capable or rigid cnc

what i'm wondering is there an effective way to...

It's roughly 12% by weight, about 10kg of epoxy was used (or less, can't remember)

kompozit-kemija.hr elan-tech epoxy EC157 + W152XLR hardener, about 100kn per kg of total mix

gravel and sand...

http://i.imgur.com/PeABr1y.jpg

If i would make it again, what would i reconsider is how to more efficiently enclose bottom part of machine where the ballscrew and linear guides are, on a image you...

some brass milling


https://www.youtube.com/watch?v=GS4bkpyMemU

Almost there ...
http://i.imgur.com/1abCn2q.jpg

2 RCaffin: i move it by hand at the moment, it's 40 and 30kg just epoxy pieces + few kilos of accessories attached, it would be manageable to move it around in two pieces when fully equiped, but i'll...

interesting calculations, but i think i'll have to live with "deformed" cnc ;)

and to be on topic ...

cnc is currently - everywhere ;)

http://i.imgur.com/WRr3ZrM.jpg

but i hope to get it...

interesting point ...
i've used aluminium because i could machine it with my own cnc ...

during last period it was cold here, and possibly hit a 0 inside workshop, however i haven't monitor, or...

yes it's a 500mm cube ;)

for rails i've resurfaced aluminum on which i'll bolt rails to ... but as i've measured about 0,1mm "sag" in the middle of surface, i've drawn the oposite curve and let...

http://i.imgur.com/b2lIesI.jpg

if you see this on your table, you've made a wrong step somewhere along the line ;)

pretty tricky to get it back in, but now i know balls circulate in three...

it's all about function, but it has to look pretty ;)

time to decorate it a little bit ...

http://i.imgur.com/TTkXMNK.jpg

http://i.imgur.com/mEhvTa1.jpg

http://i.imgur.com/sPDvvMq.jpg

feet were not flat right from the mold but it got cnced flat ...

but i have another issue, as it turns out my cnc is not straight enough for my liking ...

here is some testing, and at this...

rails are 20mm, but with diy supports, should go for real deal that support it whole length, that reversed "T" shape ... might upgrade in future

you've must done some cutting already ... pics please ;)

epoxy-ing is not done yet ... so let's prepare mold for top piece ...

you know the drill ...


some assembly required ...
http://i.imgur.com/s9vMBDG.jpg

done
http://i.imgur.com/dQzafRi.jpg

yes, good old cnc did the job of surfacing the alu pieces
http://i.imgur.com/kS7FNtl.jpg

pouring, or actually, shoveling the epoxy mix ;)
http://i.imgur.com/QjfOcnX.jpg

here you see the tools i've use to compact it between all those gaps ...
http://i.imgur.com/sjT3HXI.jpg

...done...

Thanks for interesting links !

to answer your questions ...
100mm of Z travel is more than i need, and i like how it looks in proportions, style at first place ;)

here are rails for X and Y,...

what flatness of epoxy surface you expect ? and can you (or will you) check it somehow ? i'm very interested in results

I, as many of you around here have build a simple cnc, then another more advanced, then i saw how it could be improved, and decided i have to build yet another cnc ;)

So, wishes first ;)
hiwin...

and epoxy granite mix is much dryer than regular concrete ... i've tried vibrating with regular motor with eccentric weight, and if mix is relatively wet it works, but when it's dry it separate into...

those small pieces are various ratios of epoxy to gravel and sand, and some are too dry so when you brake em you can clearly see that break line is around stones from gravel, and others (with...

idea is to test epoxy granite mix and process with small part and if succesfull, to make something usefull ...

so first i have to make a mold, simple wooden pieces glued together, like this...

here is some aluminum cutting with belt system

to be honest, i like the screw type more, but this will have to do for some time, because i don't want to pour more money in it ;)

and i have new...

did some work on belt drive ...

http://i.imgur.com/faD3JWz.jpg
http://i.imgur.com/sySSu9V.jpg
http://i.imgur.com/ekJYA7x.jpg
http://i.imgur.com/Buis31j.jpg

how it works at the moment

i've never seen it been used in such a way, so is it worth it ? double the problems, or double the stifness ?

space is empty and beside extra cost is there another downside ?

what you think ?...

here is the video ...


http://www.youtube.com/watch?v=ZbvKO4pPxUk

it's been awhile since my last update, so let's fast forward to current state, shall we ?

start of assembly ...
http://i.imgur.com/VZjVbIF.jpg
http://i.imgur.com/S8me1Co.jpg...