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  1. 21-09-2014 #5
    irving2008's Avatar
    Lives in NW London, gateway to A1 & M1, United Kingdom.
    irving2008
    Last Activity: 17-03-2017 Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 2,849. Received thanks 179 times, giving thanks to others 5 times. Referred 6 members to the community.
    Your original plan was to weld 2 bits of 100*100*3 together to give 200h*100w gantry. You then decided for some reason to use 2mm wall section which is lighter but not as rigid. I'm not saying anything about what you should do, just that you can't make random choices without understanding the impact of that decision. You reduced the weight because of limitations elsewhere (although weight can be beneficial against resonance) but you did it in a way that reduced rigidity and it's not clear you understood that.
    Last edited by irving2008; 21-09-2014 at 11:32 PM.
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