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Discussion in 'CNC Mills/Routers' started by HC.Carbo, Jan 31, 2018.
The search for an affordable hobby 5 axis machine.
HC.Carbo published a new build:
Read more about this build...
Only guessing, and at the risk of seeming exceedingly thick, but I assume the spindle/router goes on the black plate, pointing towards the six sided plate, but does that plate rotate?
It must be an age thing!
Good so far but now comes the hard part. How do you plan on controlling it?
GrayUK, yes pointing towards the plate & i hope it will rotate
Rick, i know, f360/pokey/mach3/4 only the post i'm not sure yet.
This is going to be a fun one to see in action! Keep up the good work
almost there...will it move ?
(forgot to mention, my first cnc maybe better ad the limit switches before firing up )
Oooooo! I'm sooo excited!!!!
Trouble is....... if it works, I'M going to have to build one!!!
Her indoors, just won't go for it.
Just curious - are you going to have another Y gantry to replace that short support piece on the right? Super build, btw!!
Limit switches...why limit yourself. Be free.
think not needed, (weight of the table is on one side)
my aim was if...if it works, move it over to a c-beam xl.
at other hand, this is a cool small setup that fits the size of the turn table
not to fast Garry, run already in some troubles
instead of 8 axis, my board is only running 4
Have to send it back.
But, it seems to run very smooth
I distinctly remember the post saying something about a video somewhere???
BTW, this is freakin' awesome!!
no video so far it's just bad ad from openB team.
sadly had a bad 8axis board, hopefully the company will give me a new working one.
meanwhile hook it up on a 3 axis gbrllll thing & playing around to get used to it
What's the total usable volume on this thing? Or do you not know what your spindle setup is going to be yet? The machine itself looks really clean so far!
I also have 5-axis plans, temporarily on hold because it'll cost about $6-8k or so (turns out, BT30 spindles, not so cheap... ), but it could be nice to have a cheap'n'easy option for non-metals in the meantime to start attacking that infamous 5-axis learning curve....
The table is 15cm & fits perfectly the minimill size spindle, will go for a small one 500a800W before i buy...want to be sure if it works
Thinking to change the setup (table weight 8kg) instead of the table on the y gantry >> table fix on the floor & put the y on the z axis for the spindle
Hope to get it running this weekend. (seems a had a bad stepper driver)
learning curve: think i saw every video(tut's) on small 5 axis machines
Big Q: will this work or do my cheap Chinese table end up somewhere in the corner (as many)
Another important Q: will F360 stay free ?
I think the way you have it is perfect, personally- you don't want to pile up too many axes on one chain or you end up with hefty cumulative tolerances that can be hard to chase down. Y-table with rotary and z-x for the spindle is my plan too, since it keeps things balanced on each side. Originally I was going to flip the x and y and keep it like a rotated vertical machining center, based on this image of an Okuma:
But once you add the tombstones for the trunnion, you've lost a LOT of x travel- a big deal when you're talking 25mm rail and epoxy pours- and it's clearly visible that each moving body would be dimensionally better on the opposite axis. You don't lose any rigidity, but you gain a fair bit of working travel.
I'm also thinking 500w for a non-metal machine. 800W would comfortably do aluminum if you set up the rest of the machine appropriately.
It's not the building or the understanding of 5-axis that's difficult, it's actually running them. The CAM for true simultaneous 5 is a whole 'nother world, apparently. A lot of highly experienced machinists avoid them where possible and stick to 4-axis or 4+1 for multi-sided parts. That's probably more my plan too, sticking to 4+1 as much as possible, but I'm there would occasionally be a part that really would benefit from simultaneous 5 (impellers, sculptures, etc). When you're trying to keep the side of the ballnose end mill in the work rather than the tip for better chipload, it somewhat limits your kinematics and you end up forced to use the fifth axis.
The trunnion assembly? Looks fine to me. I'd just be wary of overloading the belts (I'm assuming it's belt, not chain) on larger diameters where you might have nasty torque multipliers, especially if you're trying to plough through with 800W.
F360 will likely stay free for hobbyists. Autodesk can make some dubious decisions like any other software company (*cough*Adobe*cough*) but I think they're best served by keeping people coming into their pipeline so they'll end up paying customers. Since F360 Ultimate is about $6k a year or whatever, the $100k business threshold makes sense. Seems likely they're gonna keep it rolling how it is. The backlash and loss of goodwill if they change it might be difficult to bear if they're aware of any competition.
ah, new stepper driver & everything works
running a first toolpath with the e-stop in the hand
mmm, this going way too easy. as far i can see, indexing (3+2) works fine.
The reality was very different...
changed the x/z to a 50cm gantry(cbeam xl) for safety (maybe not needed when u know what you are doing)
post: there are few that are working
running a toolpath, 6*face & adaptive on top worked fine (table turns 6 times & flip over for the adaptive)
toolpath in mach 4 not really useful, but it works
Come On!!!! Where's the video??
need to clean my desk first
just done a "flow" also this seems to work... all axis simultaneous, not sure what was coming out of the machine
video on my fb page...be prepared
"flow" with multiaxis checked
not yet there, measurements need to be tweaked
for sure now, the minimill is way to small
Wow, Looks awsome,