yeah the ballscrews and stuff work well.
get him to make the ends on the shafts, they are some kind of bastard steel to work and he does it pretty cheap _________________ Mechanical engineers build weapons, civil engineers build targets
rhino preferably
's best if you can give us the whole assembly as well as the bit you want made so we can work out which parts to grab on to. _________________ Mechanical engineers build weapons, civil engineers build targets
Thu Feb 16, 2012 8:49 am
Knightrous Site Admin
Joined: 15 Jun 2004
Posts: 8511
Location: NSW
Rhino able to handle IGES (.igs) or STEP (.stp) files? Solidworks 2010 doesn't have a Rhino file format option.
thats it, enough of rhino 2.0 im downloading rhino 4.0 now _________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
Thu Feb 16, 2012 2:25 pm
Valen Experienced Roboteer
Joined: 07 Jul 2004
Posts: 4436
Location: Sydney
you mean buying rhino4 legitimately right? ;-P _________________ Mechanical engineers build weapons, civil engineers build targets
Thu Feb 16, 2012 2:30 pm
Nick Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
your file loaded ok, hit me up on msn or something for details _________________ Mechanical engineers build weapons, civil engineers build targets
Thu Feb 16, 2012 6:54 pm
Nick Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
Just out of interest, how would you go about fixturing that job? IMHO, cutting the front section and particularly the struts between the body and the weapon motor mount would be a complete bastard! Interested to learn something here...
Thu Feb 16, 2012 10:58 pm
Glen Experienced Roboteer
Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect
possibly use a bigger than needed piece of material and mill out the interior then carve the outside with a few little tabs of material on it, then just razor them off. That's what I'd do but i have no idea lol!
CNC fixturing and rejigging the work piece is still a mystery to me
Can't say I'd make the front structure that slight, but to each their own. The fun of robots is trying things out whether they work or not _________________ www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz
Thu Feb 16, 2012 11:15 pm
Valen Experienced Roboteer
Joined: 07 Jul 2004
Posts: 4436
Location: Sydney
first guess would be to drill the bolt holes then use those to hang on to it.
put some big bolts through the bits that will get totally eaten away (don't cut the bolts, that makes bad noises and dents the bearings), to stiffen it all up then cut it down in big chunks, then do a few shallow cuts at the end to release the part, take the bolts out through the holes in the frame then go from there.
With the camera we can generally line stuff up again but if you can do it in one pass even with hurdles, you do it in one pass lol.
Personally I'd be thinking of some triangulation in that sexeh curved bit coming out the front, or perhaps filling it with something to stiffen it up, but then gut feelings seem to not work too well at this scale as to whats needed or not. _________________ Mechanical engineers build weapons, civil engineers build targets
Thu Feb 16, 2012 11:45 pm
Nick Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
Great ideas and interesting to see two completely different answers; My first idea was to leave extra depth on the Z axis so there wa a flat plate to support all the wall parts, then cut of the base with a band saw. That has some drawbacks with the finish, so my other idea was to mill the part very undersized and fill the voids with wax or plastic before a final pass.
It just shows how many ways there are to do one CNC project.
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