Hi, I'm working on Cheap CNC

[njhussey]

Just from what I've researched so far.
As i'm not an engineer or electrician technical answer you wont get from me.
I've just seen a LOT of DIY builds with reasonable accuracy.

When i see parts i see things that i've seen it in or used often far from the field that i'm researching.
Example would be when i looked at my mates WP site and had to learn the tinyest amount about mild steel.

I started my build with the tiniest bit of knowledge (which can be extremely dangerous ) about CNC, after much research, and discussion on here, I came to the conclusion that to get a half decent CNC Router you need £1,500 (mine currently stands at £3k or just over) absolute minimum, and that's begging, borrowing (I'll not advocate stealing!!) materials to build the frame, wiring etc.

With this i know that for £20 i can get 6m of equal angle mild steel at 3 or 4mm thickness.
This is made straight and is strong combined with V Groove bearing with a 2.5mm Drop (groove) should work as the roller bed worked in the car garage i once worked in.

It might work for a garage door (or whatever) but believe me it's not straight, flat or even 90°. It won't give you any sort of accuracy without any sort of machining.

Belt or Chain above Ball n Screw so i've been told, so i'm going with it for now.

Belt is good for a lightweight 3D printer or laser or a very light small (think of cutting balsa, 3mm ply, or engraving or making PCB's on something with a cutting area of 400mm x 300mm) CNC router.

I have 3 steppers controlled with Gcode and a universal gcode streamer.
Software Easel.com
Simple Pi or Ardunio Set up
Motor Drivers Power supply with plenty of Ampage.

What steppers? What Ampage for the drivers, what drivers?

At the end of the day you can throw a CNC Router together using a cheap 3 axis board, cheap steppers, V bearings and unmachined steel and it will cut wood, however it will be slow and innacurate and if you're trying to do anything which necessitates a decent fit between parts then it will be frustrating.

If you're serious about CNC then read all the build logs and then ask yourself what you're expecting to do with the machine. Start a build thread laying out exactly what you want (materials, i.e. size, soft wood/hard wood/aluminium etc.) to cut/make, post up a sketch of what you're proposing and we'll tell you if you're on the right track and point you in the right direction. You might get a few very blunt answers but it's all part of the banter that goes on in this forum!!

Edit... seen you've already started a build thread...