Comments on: What size does my gantry tube need to be for a DIY CNC https://cncrouterinfo.com/article/what-size-does-my-gantry-tube-need-to-be-for-a-diy-cnc/ Fri, 10 Mar 2023 10:28:57 +0000 hourly 1 https://wordpress.org/?v=6.4.5 By: Spikee https://cncrouterinfo.com/article/what-size-does-my-gantry-tube-need-to-be-for-a-diy-cnc/#comment-349 Fri, 10 Mar 2023 10:28:57 +0000 https://cncrouterinfo.com/?p=404#comment-349 In reply to cocktails.

Thank you!

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Thanks!

]]> By: megavolt https://cncrouterinfo.com/article/what-size-does-my-gantry-tube-need-to-be-for-a-diy-cnc/#comment-71 Tue, 18 Oct 2022 06:17:46 +0000 https://cncrouterinfo.com/?p=404#comment-71 I aⅼways еmailed this webpagе post page
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]]> By: Spikee https://cncrouterinfo.com/article/what-size-does-my-gantry-tube-need-to-be-for-a-diy-cnc/#comment-27 Wed, 05 Oct 2022 20:08:13 +0000 https://cncrouterinfo.com/?p=404#comment-27 In reply to Andrew.

Hi Andrew those are great insights. X/Y deflections are the highest because it is basically a big mechanical lever. Double carriages (with a big as possible distance between) can help to limit this.
In addition to oversizing gantry/riser construction. I have not done the full calculations for my new build yet. But it is something I’m working on.

]]> By: Andrew https://cncrouterinfo.com/article/what-size-does-my-gantry-tube-need-to-be-for-a-diy-cnc/#comment-25 Wed, 05 Oct 2022 18:11:39 +0000 https://cncrouterinfo.com/?p=404#comment-25 Its great to see someone putting in some design effort into a homebuilt router instead of just eyeballing everything! Simplifying systems into something easy to model (like a beam) is key.

Something that surprised me when I did the math on my own router design was that the x/y deflections of the gantry tended to be much more significant than the z axis deflections. This is driven not only by the horizontal cutting forces but also the dynamic loading from accelerating the spindle around. If you want to check out the specifics you can take a look at my post here: https://burksbuilds.com/2021/12/20/cnc-router-stiffness-analysis/#Results

You have a later blog post on millalyzer and mentioned that you bought a license. For the cutting cases that you expect to encounter on this machine what kind of loads are you expecting? How does that new information impact this beam model?

Thanks for all the great content!

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