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Type: Posts; User: Nikolaguca

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    Re: Use for 850x3500mm CNC

    I could maybe make it 1200mm wide by having a moving table/fixed gantry design, I'm not sure about a moving gantry design...



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    Use for 850x3500mm CNC

    A friend of mine is selling 1000x3500mm bed for a cnc router made from very heavy steel profiles (double 200x100x10mm) with machined flats for linear ways.

    The construction weighs over...
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    Re: 150x100cm Steel frame router build

    Hello guys, I'm making some progress on the project but I have a question for you.

    I've mounted the ballscrew (2010) and when I put some force on the gantry side I get some movement along the Y...
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    Preloading linear bearings

    I've bought hgh25 lineqr bearings with z0 preload ie. no preload at all and I don't like the feel of them; the machine I'm building is heavy steel structure and I think the bearings would be the...
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    Re: DIY Fibre Concrete 40x30 CNC Mill

    Is concrete going to shrink during the following weeks and months as it cures completely?

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    Re: 150x100cm Steel frame router build

    As I'm waiting for the main frame to get machined I decided to continue with the design of the Z axis.

    I think I found the middle ground regarding Z carriage placement. What do you think? The...
  7. Re: ATC Spindle Assembly using a Chinese BT30 Spindle Cartridge

    I hope you'll record a video of the new spindle in action. I intend to use a bt30 spindle in the future as well and I would love to see it milling some aluminium and maybe even steel perhaps.

    Keep...
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    Re: 150x100cm Steel frame router build

    I thought about using thread loctite for all bolted connections to avoid such problems. Would that be enough?

    I experimented with this Z axis design in Fusion... it would be as compact as...
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    Re: 150x100cm Steel frame router build

    I'm having some trouble with Z axis design. As you've changed my mind regarding rail and carriage orientation, I now have no idea where to find space to make carriages fixed and rails moving...

    I...
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    Re: The 3d router for furniture processing

    Wow! Nice build.

    Did you have that Y axis (long axis) tube machined for mounting linear rails? And how did you attach it to the main frame?

    Do you think those 2kw servos are a bit of an...
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    Re: 150x100cm Steel frame router build

    Isn't that 50km figure if the bearings operate at their maximum dynamic load?

    At 10m/min you would go through that 50km in 5 days...
    ...
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    Re: 150x100cm Steel frame router build

    Can you re-ball the bearing blocks with bigger balls to get a higher preload just as you do with ballscrew nuts? Is it simple as that or not?



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  13. Replies
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    Re: 150x100cm Steel frame router build

    On some machines I saw that people put 3 bearing blocks on each side of the long axis...

    Is there any benefit in doing so regarding rigidity and life span on the bearing blocks?

    I'm using 25...
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    Re: 150x100cm Steel frame router build

    With the main frame fully welded I can now start working on the X axis. Since I'm not sure what I'll use the machine for, I'm not sure at what height to set the gantry at. I'm thinking 9-10 inches...
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    Re: 150x100cm Steel frame router build

    I went with this design because the gantry mill that will machine this frame is 100cm wide, and I had to put the rails below the table if I'm going to have a 100cm wide machine.

    Putting the rails...
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    Re: 150x100cm Steel frame router build

    Next weekend I'll send the frame for machining and that leaves me to start working on the gantry.

    The main concern I have right now is about how to connect it to the carriages below the table.
    ...
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    Re: 150x100cm Steel frame router build

    I've welded the construction today... just to figure out how to get it off my welding table and I'll send it to machining. It's around 200kg already.

    I didn't weld it fully and I did jump all...
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    Re: 150x100cm Steel frame router build

    NiC77:

    I've bought the tube today and I now realize what you are talking about... a 135cm piece of tubing is 220lbs/100kg

    I haven't bought the motors yet. I thought about putting a 2:1...
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    Re: 150x100cm Steel frame router build

    Omg! Thank you for your effort. Your posts are always very helpful.

    Unfortunately I can't go high rail. I've commited to have the rails below the table so I can have a 1m wide machine since that's...
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    Re: 150x100cm Steel frame router build

    I was at a scrapyard today and I saw a 200cm piece of square tubing thats 250x250x10mm. Thats 10x10in and 1/2in thick.

    Is that an overkill for this design? My main concern is the weight since the...
  21. How CNC lasers manage such high feed speeds?

    I can't find any info online as to what drive mechanism they use to achieve such high acceleration and speed (more than 100m/min) (could someone translate this to inches/minute)

    I've heard that...
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    Re: 150x100cm Steel frame router build

    I think Peter said in another thread that it's better to spend 500 hours in CAD than to spend that time in the workshop and thousands of dollars to figure out that something is wrong with the design....
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    Re: 150x100cm Steel frame router build

    I guess the easiest way is to laser cut all the parts and than weld them and heat threat it?

    Or maybe CNC bending a flat sheet while leaving the ends in such a way as to bolt them together...
    ...
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    Re: 150x100cm Steel frame router build

    An interesting gantry design I've found online.

    I haven't seen anyone use triangular gantry even though a triange is a strong shape that resists change in it's shape more than the...
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    Re: 150x100cm Steel frame router build

    I haven't really thought about local vs global rigidity. Thanks for that idea.

    I did some quick simulation in F360 to see what will happen if I used angle iron vs tubing. The results confirm what...
  26. Re: Why machine rigidity matter that much if the cutter is the least rigid part?

    If I change the rails orientation and stick them to the slindle plate, won't I lose clereance if I use longer tools?

    In the photo below the Z axis is in it's highest position, if I move the...
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    Re: 150x100cm Steel frame router build

    Oh I'm sorry I wasn't clear. By removing the raised Y beams I've made the machine 1600x1000mm which they can machine and I haven't lost any working area...

    I think they can machine the table top...
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    Re: 150x100cm Steel frame router build

    Right after I bough almost all the steel I need I decided to completely change the design of the router.

    I found out that the factory near me has a gantry router. I could weld and assemble the...
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    Re: 150x100cm Steel frame router build

    I've got a couple of questions for you guys. Hope everyone is doing good in these tough times.

    I finally started the build. I bought 200kg/400lbs of steel today.

    My Y axis beams are connected...
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    Re: DIY ATC Spindle design

    Any update? Did you make ATC work?

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