L gantry design with 2 aluminium beams bolted with T nuts inside...

[pierantoine]

Hi Pierre

This is exactly what I did on my build (see my build here post #10) . My Gantry is 700mm wide so I think I spaced them at between 120 - 150 mm apart, drilled through the profile so I could tighten the bolts. I was using much heavier material than you are (4 kg/m) and only 80 x 40 profile. The L shape inspired by Jazz gives great resistance to torsion. What type of spindle will you be using? The spindle I have weighs over 2kg hence the use of the heavy gauge profile to resist torsion. I have some concerns about the thickness of the material you are using for your gantry if you have a heavy spindle plus the weight of your Z axis ballscrew, bearings and stepper/servo motor?

Kind Regards
Michael

thanks !
80x120 profile
15mm ground aluminium and 20mm alum plate
2.2kw chinese spindle water cooled
i would buy the 3nm from zap or cnc4you if i had to rebuy instead of 4nm from cnc4you.

my log here
http://www.mycncuk.com/threads/8717-...c?goto=newpost