about to build my first CNC machine

[Sienci]

Hey there,

Don't be afraid to start your own CNC project! Even it doesn't work out, you can always use the hardware you get to build something new.

Luckily there's a lot out there you can use to build your own machines.

I have a couple of things I have in mind that I found work well in my experience building bits and bobs.

First is use a GRBL controller (I would suggest TinyG or a GShield, or even a CNC Shield V3.0 if you're on a strict budget). These are easy to program and have a lot of support available.

For CAD software, I use SolidWorks. SolidEdge, Catia, are all similar tools. These are all really really expensive, so if you don't have access to them or at least the education copies, something like Autodesk Fusion is a decent alternative. The closest cheap Solidworks alternative I have come across is Cubify 3D. A 3D modelling software is hugely useful if you can assemble your machine before building it, so you can see where you're going wrong.

For your linear drive systems, I would suggest sticking to one type on each axis (although threaded rods/ballscrews almost always used in the Z axis). I think ball screws is a pretty good choice.

Good luck!

Andy

[CHIpHload]

First is use a GRBL controller (I would suggest TinyG or a GShield, or even a CNC Shield V3.0 if you're on a strict budget). These are easy to program and have a lot of support available. i have not looked into electronics just yet , when i get to that i will probably build round digital drives like am882 or similar. so holding off purchase of anything like that just at the moment,though i am comparing some specs of controllers & drives as i go, thanks!

For CAD software, I use SolidWorks. SolidEdge, Catia, are all similar tools. These are all really really expensive, so if you don't have access to them or at least the education copies, something like Autodesk Fusion is a decent alternative. The closest cheap Solidworks alternative I have come across is Cubify 3D. A 3D modelling software is hugely useful if you can assemble your machine before building it, so you can see where you're going wrong. have noticed fusion mentioned though maybe there is something wrong with me , i am reluctant to use as along with other issue i have it is cloud based.maybe those who know will tell me this is the best option

[komatias]

Welcome aboard Chipload. Dont spend a dime unless you get a good design up. It will save you buying the wrong stuff.
There are now plenty of free CAD programs to play with but the one that I find offers the better deal/package is Fusion 360.

So best of luck with your endeavours. we will anticipate some photos in return for our collective wisdom.

Hey there,

First is use a GRBL controller (I would suggest TinyG or a GShield, or even a CNC Shield V3.0 if you're on a strict budget). These are easy to program and have a lot of support available.

Andy, with all due respect, Chipload wants to build a router not a 3D printer. And why program anything if one can just plug into Mach3 and be done with it?

[CHIpHload]

Welcome aboard Chipload. Dont spend a dime unless you get a good design up. It will save you buying the wrong stuff.
There are now plenty of free CAD programs to play with but the one that I find offers the better deal/package is Fusion 360.

So best of luck with your endeavours. we will anticipate some photos in return for our collective wisdom.

thanks komatias, so many options ! i am trying not to be too keen . now im back to my original idea for wood router birch ply torsion box build , with all internal structure of constructed something like this, as to build a torsion box with all internal squares the same will have more problems at a given freq according to what size squares and although while much easier in construction may not be ideal for this. i had thought same design as above hexagonal ribs for internal structure of bed, gantry also gantry sides and this appears to be backed up by by conclusion in Optimum column design using honeycombs (last link in first post) http://www.mycncuk.com/threads/5283-Interesting-Papers-on-heavy-duty-design-vibrations-composites-and-column-design. although i am far from being able to interpret if there is any actual construction detail (dimensional ratios). any interpretations welcome. i have also noticed CFRP (carbon fibre reinforced polymers) may be suitable skin for this type of construction and is also available as plate & woven carbon sheet although i'm not sure of methods of taking carbon sheet (pre pregnated?) wrap for gantry & resin up. has anybody tried this sort of thing or what do you think ?? the hexagonal parts could also be filled with say a mix of perlite and polystyrene balls. maybe also longways between two bed face's running through centre of hexagonal parts a bungee or some sort of rubber tubing (what tension?)