build your own cnc

too big for my budget but still good inspiration
i have only seen this video but there are more of his project

https://www.youtube.com/watch?v=XNvoFTV5tIE

wondering if he will marry this with a lathe
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On Thu, 26 May 2016 14:36:35 -0700

he never says what the problem was that caused the entire steel frame to warp
not having done much welding i would have to guess that he should have clamped things to a rigid frame while it cooled so it did not warp
that is a guess but i cannot think what else would cause it to bow or warp like it did
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On Saturday, May 28, 2016 at 1:24:22 AM UTC-4, Electric Comet wrote:

Welding by itself can cause warping. Read up on it and you should quickly realize that welding is both a science and an art, not just a skill...
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On Thu, 26 May 2016 14:36:35 -0700

watched some more of the process of making his own cnc
wonder if he saved any money
buying a used cnc would make more sense
and if you need vertical ability maybe it could be modified for that feature
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wrote:

Absolutely he saved money but his machine won't be as accurate as one purchased. Buying something comparable to what he built would start at over $13k.

That's fine if you can find one the size you need. I searched for used for almost 2 years before I gave in and built one.

More vertical (Z) travel introduces Y & Z axis flex into the equation. Get only the height you need and nothing more. If needed figure out a way to remove the table and clamp the project below the normal table surface.
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On 09 Jun 2016 01:02:29 GMT

it is a big machine he built but if it is not accurate than how much do you save
maybe he can adjust things over time but not sure about that
maybe i missed it but i did not see any mention of leveling the table or any leveling features for that matter
i was surprised when he shimmed the table top because i thought he should have leveled the base to the floor
at least he did not let perfect get in the way of good enough though
can always tweak things as you go

i see a few here and there i noticed that lagunatools has some from time to time

i think that doing that makes it much more versatile and useful
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On Wednesday, June 8, 2016 at 11:03:20 AM UTC-7, Electric Comet wrote:

Rather, less sense. He had any size of his choice, capabilities (including vertial mount) that are unlikely to be available off-the-shelf, and all tolerances were his to specify and build to.
It's likely he is much happier with a custom tool, rather than whatever-is-available either COTS or used. He spent money, he got value for it. "Save" wasn't the goal; that oughtn't ever detract from the primary concerns.
I once chatted with a carpet-cleaner as he unrolled, washed, dried, and re-rolled a massive rug using a big motorized drum with excellent controls; he built it himself, and it was just about perfect for the job.
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