Re: 30x30" open source CNC machine design
Quote:
Originally Posted by
aluminumwelder
sorry your assumptions are incorrect. The z axis does not use Vbearing slides it using linear bearings. And if your material is pine wood and depth of cut is only .062" then 3kg is adequate, heck it might be adequate for 1/4 Depth of Cut. the fact that you do not give material or depth of cut specifications with your above assumptions makes it looks like you work for a competitor trying to bad mount the competition.. IMHO.
The Z axes in the Video is using V-Bearings 4 of them for the Z axes he states this in the video, the whole machine is using V-Bearings, I will tell you again you are wasting your time with this design, even with 1Kg this design is a fail
If you want to build junk then go ahead, there is a new one that pops up everyday but most don't stay very long in the market place
I'm sure you can find an extrusion that you could epoxy some steel tube into, you have to do your own home work for that, most aluminum extrusion manufacturer's give all the profile dimensions how hard could it be to size some steel tube for what the profile is
Aluminum Extrusion can be manufactured to any spec's you want if you want to buy 5ton for your first order, which some machine builder do have there own Extrusion Profile
Re: 30x30" open source CNC machine design
THE X & Y USE V WHEEL BEARINGS, THE Z AXIS USING LINEAR RAILS. THE V SLOT ALUMINUM ON THE Z AXIS IS FOR ADJUSTING THE DUST SHOE UP AND DOwn. i see a ton of nice hobby stuff made on youtube using v wheel cnc based machines. 1/2 a thou for hobby work is necessary. LOL, you think i am making swiss watches as a hobby. lol.
most aluminum extruders require about $1500 to $2000 die fee and only a 1.5 ton minimum order, kind of silly suggestion for someone just looking to make a hobby cnc.
if it's so easy to find a cnc appropriate extrusion to put a steel tube in then google it and show me.
sorry your replies are just flippant.
Re: 30x30" open source CNC machine design
Quote:
Originally Posted by
mactec54
[U] most don't stay very long in the market place
shapeoko and x carve have been around for years.
Re: 30x30" open source CNC machine design
Quote:
Originally Posted by
aluminumwelder
THE X & Y USE V WHEEL BEARINGS, THE Z AXIS USING LINEAR RAILS. THE V SLOT ALUMINUM ON THE Z AXIS IS FOR ADJUSTING THE DUST SHOE UP AND DOwn. i see a ton of nice hobby stuff made on youtube using v wheel cnc based machines. 1/2 a thou for hobby work is necessary. LOL, you think i am making swiss watches as a hobby. lol.
most aluminum extruders require about $1500 to $2000 die fee and only a 1.5 ton minimum order, kind of silly suggestion for someone just looking to make a hobby cnc.
if it's so easy to find a cnc appropriate extrusion to put a steel tube in then google it and show me.
sorry your replies are just flippant.
Yes your are correct, in the Video though at 2.32 he is calling the Linear Bearings (A 4 Wheel configuration ) someone that builds a machine like this and does not know the correct names of the part he is using is not someone you want to be buy a machine from, they also must be very poor quality Linear Bearings to have that much slop in them
The normal Z axes build with Linear Bearings will have no more than .0005" to .001" of movement depending on the grade of bearing being used, so he has a big problem with his Z axes
At that point of a Z axes you want it to be as rigid as possible and .0005" is quite normal for any of these machine, this has nothing to do with machine accuracy, it is a rigidity requirement
If your cutter can move around +/- .010 you are going to be breaking cutters, that is why the Z axes has to be rigid
There is no die fee if you do a 5 Ton deal, I have done it this way, and it works out better, ( have you ) :)
Do your own home work Google the aluminum extrusion manufacturer's yourself I have no need to use extrusion to build a machine which I would not use for a machine like this unless it was just a 3D printer or laser
Re: 30x30" open source CNC machine design
Quote:
Originally Posted by
aluminumwelder
shapeoko and x carve have been around for years.
Yes there is a market for suckers and those that don't know any better
Re: 30x30" open source CNC machine design
LOL, there is no die fee, or maybe the economies of scale make it cheaper so instead of just reducing the price they keep the price the same and tell you its' free, when one spends $25,000 or more it is easy to throw in "free stuff"
anyways I can tell you are a perfectionist with no real solutions for a lame hobby person like me, so you make your swiss watches, and I'll make my birdhouses OK?
Re: 30x30" open source CNC machine design
Quote:
Originally Posted by
aluminumwelder
LOL, there is no die fee, or maybe the economies of scale make it cheaper so instead of just reducing the price they keep the price the same and tell you its' free, when one spends $25,000 or more it is easy to throw in "free stuff"
anyways I can tell you are a perfectionist with no real solutions for a lame hobby person like me, so you make your swiss watches, and I'll make my birdhouses OK?
The are hundreds of hobby guys that have built simple machines to start with and then built better machines once that see the short comings of the first build, just trying to move you past the first stage so you don't have to do it all over again
If you did spend $25,000 and made $60,000 from that $25,000 investment I think that would be a successful outcome, If a design requires you to do this then some of us do this to move forward, there is a Zone members that did do there own Extrusions for there CNC Router machine builds
Re: 30x30" open source CNC machine design
so I want to buy a hobby machine and you are telling me I could get my own custom extrustions made if I only spent $25,000? LOL talk about not understanding my needs. Some people just go way overboard. The only people that are going to pay to get custom dies made and stock pile 5 tons of aluminum are cnc manufacturer's not hobbiests, I thought that would be obvious !
only machine I could find that uses rack and pinion and is under $2000
https://millrightcnc.com/product/mil...router-bundle/
not being sold till spring of 2020 anything that is currently available less then $2000 and around 24x24" at least , 30x30" would be better?
Re: 30x30" open source CNC machine design
Quote:
Originally Posted by
aluminumwelder
so I want to buy a hobby machine and you are telling me I could get my own custom extrustions made if I only spent $25,000? LOL talk about not understanding my needs. Some people just go way overboard. The only people that are going to pay to get custom dies made and stock pile 5 tons of aluminum are cnc manufacturer's not hobbiests, I thought that would be obvious !
First off you said you could make it for X amount of dollars, then you complained that you could not find extrusions that you could epoxy steel tube into, I gave you some choices did not say you had to have your own extrusions made but what is possible
Quote:
Originally Posted by
aluminumwelder
only machine I could find that uses rack and pinion and is under $2000
https://millrightcnc.com/product/mil...router-bundle/
not being sold till spring of 2020 anything that is currently available less then $2000 and around 24x24" at least , 30x30" would be better?
So why do you keep looking at the same kind of junk !! build your own most people can do better than what you can buy the cheap junk for figure out a design type you want and go for it
Re: 30x30" open source CNC machine design
Anything under $5K-$7K is a tradeoff, price vs performance.
The only thing that matter is if it meets YOUR expectations. For most of the members here, those cheap machines are just not good enough. Some people take their hobbies more seriously than others.
Re: 30x30" open source CNC machine design
nevermind you have not helped me at all , you just like arguing bye.
Re: 30x30" open source CNC machine design
Quote:
Originally Posted by
aluminumwelder
nevermind you have not helped me at all , you just like arguing bye.
Just for you here is someone that is having a problem with his machine, just the type you have been talking about https://www.cnczone.com/forums/uccnc...br />
cnc.html may be you could solve his problem for him