A small update on my DIY CNC project.
2 - 90x90mm profiles and 25mm rails (1210mm)
4 - 45x90 profiles
I think this part of the frame is the way I want it - now I`ll try to design the rest.
Including 25mm mdf
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Nice. I like it. I looked at a similar design but decided on a just stronger version of what I already had. Maybe the next one will be like that. You live and learn, don’t you? Let me know how you get on.
Most of my designs and project is based on “learning by doing”. This is my first DIY CNC project. When I start a project like this, I spend a lot of time getting inspiration/ideas… trying to find a setup that I think is ok. I have found that there is a lot of ways to build a CNC, so in the end I have to base the design on what I like/believe is ok. When the hardware is done I have to decide what electronics… to use…
Carry on the same way you started and I’m sure you will have fun with the machine. It is always a pleasure to see something coming to life. Specially when you designed it yourself. My first one was an openbuilds ox cnc router kit set. It did the job for a while but it came pretty quick on it’s limits. I redesigned it and used the same system and have now something I’m pretty happy with. Once you started building one you can’t get enough. It’s like a hug and there are always things to upgrade. Keep me up to date on your build.
Very interested to see how you handle the gantry. Looking great so far though.
Have started testing different design , but not ready yet.
I plan to mount the two X-rails on two 20x70mm alu plates.
Something like this? but with longer distance between the blocks. In this model I used 20mm alu. I may add a 45x90 or 40x80 Bosh alu profile…?? I have to spend some time trying to find a setup I like.
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Could you consider to turn the two top rails (with the slides) 90 degrees to move the slide/rail assembly a little farther out of the “dust-and-crap” that will be coming off the cutting tool? May not be a problem, but I feel better the less cuttings and shavings that get onto my linear bearing surface. Nice work, the design looks bullet-proof. Keep the photos coming.
Have been thinking on that as an alternative.
If I use the design like in the 3D model the X part of the gantry is shorter and the “legs” on the sides shorter - great for stability, but I may get a dust problem?
If I rotate the rails 90 degrees and move them to the sides, The gantry X length and the length on the “legs” increase - Less stable?
But I get less dust problem and it is simple to fasten the plate for the “legs” to the slides…
Which setup do you guys recommend me to use?
(Sorry – my English is not the best)
Turning your rails does make sense. I suppose you could always cover the linier guide with a brush. For that same reason I covered my guides. What kind of work do you wanna do with your new CNC?
Most wood, some plastics and aluminum
@Oyvind_Amundsen
I was also thinking, with your current design (rails on the top), it’s really designed to take a heavy load from the top down. However the majority of the load is going to be side to side , forward & backward, and pushing upward as the tool presses down into the stock. Another consider rails on the side.
I consider a gantry like this. The two Y bocks mounted on a 11mm alu plate. Then a solid 40x80 alu profile.
For the x rails, two 20x70 alu plates mounted on a 6mm alu plate (I may adjust the length between the two 20x70 plates)
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