I think its fair to say that making it a box and filling it would be of more benefit to the machine.
Hehe, what's new .
Last edited by Lee Roberts; 26-06-2014 at 01:49 PM..Me
Hmmm yeh true i will add a back the column now, but im not sure on the ribs as if i weld these it may upset my ground face, i may add a couple bars inside to act like rebar. I will get some info on the z axis as im not sure weather to make them out of steel or ally for acceleration.
Ballscrews are 1605 on all axis.
Toroidal transformer is the way i am going for now, just need to do some research.
A bit more work done tonight, the beginning of the bed. This is the main body where steel strips will sit creating the t slots, coolant channels on either side. This will eventually be ground.
steel has better damping properties so I'd prefer steel. Although as Lee has pointed out, there are other ways to solve the damping problem.
Last edited by Jonathan; 27-06-2014 at 04:53 PM.
Not quite sure what you mean there? Would it be a good idea to add a plate to the back of the column and fill it with resin, or concrete?
Steel it is then! Cheaper too! Does anyone know the realistic weight of a 2.2kw spindle?
I will hopefully be goin to have a bt30 cartridge and motor, but i suppose it wont be too difficult to change the stepper motor of needed in the future.
I think the problem with concrete is that it’s relatively brittle (though I note your suggestion of using rebar), cracks could form in the concrete and over time it may break down inside the column, I don’t know enough but I’m guessing that it doesn’t really have the same dampening properties as other materials, epoxy resin is a favourite but so is kiln dried sand and the sand is cheaper in comparison.
I think what I will do with mine is to, reinforce the column on the inside, use a mix of aggregate (different sizes, type 2, pea shingle and so on) to then fill the column, then backfill the lot with epoxy resin (filling up the leftover voids) all the way to the top, hopefully creating one solid mass. The idea being the aggregate is just away to use less resin (cost vs. cost) but also brings back the properties of using sand.
Right okay i see now, i think the plan will be to enclose the section in the back which isnt being used by the stepper motors, and fill it with sand, i can always use a resin afterwards if i change my mind.
Back to work with my column to drill more holes haha. The bloody thing is heavy hahah!
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