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I've put off assembling the gantry parts for now and moved on to making the bed rail supports. Here is the basic bed structure and the parts I'm making now are the large RHS sections on top of the...

As I feared the return to work after Christmas means workshop time has significantly reduced. For various reasons I've only been able to get about an hour in there.

But I have been able to get a...

Hi Jonathan,

If you look at the last photo in post 19 you can see that I generally use an 18mm piece of chipboard if I need to cut all the way through. The part I cut out in the last photo does...

Another interesting paper here, showing equations to determine most effective means of layer damping with different geometries.

http://www.dtic.mil/dtic/tr/fulltext/u2/a088200.pdf

I've come across a few interesting papers on machine design that other people might find a useful source of ideas for new builds:

Excellent and lengthy paper detailing a heavy duty design:...

For those interested, I thought I'd post my updated stiffness calculation spreadsheet in a new post. This spreadsheet is intended for a typical moving gantry cnc routing machine, and may help with...

Ok, so maybe that was too much of a mind dump!

In summary, for the machine being considered:
There seems to be some benefits to the lean back style of gantry where the C of G ends up in the...

Attached are my thoughts on CNC design, looking at forces, moments, inertias etc.

Would be interested in thoughts on these ideas, and whether I'm missing anything in these considerations. Some...