operation cnc

[kingcreaky]

spent most of last night laying awake. I get a bit like this when im 'on one' with something like this.

The more I read, the more ive established that the cutting ali is all about getting the strength in the right places. You dont want things flexing. I fear this may be copying another idea ive seen somewhere, but instead of having big lanky gantry support uprights with the linears at the bottom... how about having the linear rail at the top. this way, I dont have to decide now what the maximum height I want to work with is, plus I think its likely it will be very rare that im dealing with anything 'deep' as such. therefore I can cater for bigger objects by lowering the cutting deck and from an amount of movement I have available in my z axis?

I have an abundance of wood available to me, so Im thinking the uprights and cross members that support the Y linears etc (the table as it where) is going to be made of wood. then the gantry out of ali... does anybody think this is a really bad idea?

anyway, ive made some more pictures available...


I think im going to have two ballscrews for the gantry (one at either side) with two steppers.