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  1. 27-08-2018 #1
    Robin Hewitt's Avatar
    Lives in Seaford, Sussex, United Kingdom.
    Robin Hewitt
    Last Activity: 2 Days Ago Has been a member for 9-10 years. Has a total post count of 1,614. Received thanks 109 times, giving thanks to others 7 times. Is a beta tester for Machinists Network features. Referred 1 members to the community.
    A fast ticket to ridicule, according to some bod trying to do it on YouTube, but what care I?

    I had this notion that 30mm round rail bolted to RSJ's might just be rigid enough. I looked at what was available and went for 230x75 parallel flange channel at 25 kg/meter. The rails are all 50cm long.
    Click image for larger version.  Name: SG1.png  Views: 3296  Size: 849.0 KB  ID: 24719

    I machined aluminium blocks to connect rail to RSJ. These fit inside the channel. There's a thin slice of channel draped over one of my blocks in the picture.

    The idea is that misalignment is irrelevant, it is twist and flex that must be overcome. Do we agree?
    Last edited by Robin Hewitt; 27-08-2018 at 10:17 PM.
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