Definately a scrapyard challenge

[motoxy]

Hi guys. This is my first attempt at building anything like this myself. I have a history in motorcycles for 45 years and used to be a mech eng designer. Its a bit diferant without a full blown workshop doing your bidding. This project has a limitation on funds but I will not skimp if possible.

As it is the first I have decided to make a torsion box base. If this all works then I can upgade to a metal frame later. I also thought that linear rail bearings would be better than bearings on angles.

I realise that regidity is essential so the y gantry has been constructed from 10mm Ally. Although it came cheap the angle was not exactly 90deg . Bit of patience and it appears to be fairly accurate. When the rails arrive for it the will be measured off the x rails to locate. If it ends up being too heavy then I can cut sections out to lighten the load. It rolls well but inertia maybe a problem.

I have ordered ballscrew, 2 for the x and 1 for the y. My next decision is stepper size (3nm maybe) and whether to build or buy the z.

Comments are always welcome. Already had great advice on spindle choice.

Bruce