Aluminium profile cnc build

[routercnc]

Welcome to the forum.

My experience is 600mm is the maximum width for single central ballscrew. Even then you have to be mindful of hard cuts at the ends of the travel, but in general it's fine. Above that it is double ballscrew all the way (or drive from each side anyway).

As Clive mentions single or double motors will work. Draw it out and take your pick. I like double motors as then you can buy lots of the same motor spec and driver and use them on every axis. Not a strong reason, but can make things simpler.

Something to point out is that in post #1 the last picture (5-8.jpg) shows a better machine in the top corner with double ballscrew drive. This will cut wood and plastic well, but you can go a step further than this and remove the gantry sides (weak point) and raise the X axis rails up to meet the gantry cross beam. Use a series of legs to support the raised X axis connected back down to the bed and for not much extra effort you will have a much better machine.

Good luck with the project . . .

[valdis034]

Hi again. After a I while now i am going to put my free time into designing as much as possible. For now i have just several main extrusions with rails and blocks on them. Now want to start to count what exact lenght I need of extrusions, where to place rails and ballscrews, which is quite confusing to start with. I am considering if it is worth to buy custom made rails and ballscrews lenght to my exact dimensions, or it is cheaper to have a bit smaller work area than I wrote in my first post and to go with standard lenght which is 1500mm and 1000mm? I mean how expensive it can be to have those lenghts of rails and ballscrews at those dimensions, which could let me have exact 1500x1000 work area.

Here is the picture how it looks at the moment.


All the corners i am going to join with 90 degree L shape brackets. Do i Need the legs? If yes, then probably it would be nice idea to have a pair of legs in the middle yes?
Thanks a lot! :)