Design a CNC Mill Machine - Guidelines & Resources

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Discussion Overview

The discussion revolves around designing a CNC mill machine, specifically focusing on the structural frame. Participants seek guidance on initial steps, resources, and considerations for their designs, including load calculations and material capabilities.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant emphasizes the importance of determining the loads on the structure as a starting point for design.
  • Another participant highlights the balance between cost and capability in DIY CNC machines, noting that the choice of materials and resolution is influenced by the budget and the quality of linear bearings used.
  • Questions are raised regarding the intended application of the CNC machine, with suggestions to consider materials such as PCBs, foam, wood, fiberglass, and aluminum.
  • A specific size for the machine is mentioned, with dimensions of approximately 4 feet x 4 feet x 5 feet, and the intended use as a CNC laser machine.
  • Participants are encouraged to conduct preliminary research online, as there are many documented designs available for various applications.

Areas of Agreement / Disagreement

Participants express varying levels of agreement on the importance of load calculations and the balance of cost versus capability, but no consensus is reached on specific design approaches or resources.

Contextual Notes

Some limitations include the lack of detailed specifications for the linear actuators and the absence of specific load calculations or material choices that could affect the design process.

Who May Find This Useful

Individuals interested in DIY CNC machine design, particularly those focused on structural considerations and material capabilities in engineering applications.

koolraj09
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Hi guys.
I want to design a cnc mill machine. I have to design it's structure (frame), the other things are taken care of. For this I need your guidelines like from where to start etc.. Any resources,links would also be helpful.
 
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koolraj09 said:
Hi guys.
I want to design a cnc mill machine. I have to design it's structure (frame), the other things are taken care of. For this I need your guidelines like from where to start etc.. Any resources,links would also be helpful.

First find the loads on the structure.
 
I'm also interested in building my own as well. The primary concern with every diy CNC machine (IMHO) is going to be a balance between cost and capability. Cost obviously being how much money you're willing to put. This directly translates to your capability, which mainly consists of what materials you can machine and what resolution you can machine it too. Because everything in series will deflect in series, your resolution will be highly dependent on what linear bearings you use, their deflection, etc.

That being said, what is your intended application? PCBs, foam, wood, fiberglass, aluminum? Also what size of each axis are you looking for? e.g. 12"*5"*3"?

This will be the driving factor in your design, hardware, and cost.

A good start would be to try google first. It doesn't seem like you've put too much research in yet, but there are dozens, if not hundreds of documented, open source, and even full CAD downloadable designs already out there for the full range of applications.
 
Hi guys!
Thanks for your replies.
Actually I've 3 linear actuators. I am going to use them as usual for x,y & z axes. And the Z axis will be on a gantry. We're going to use the machine as CNC laser machine. The size is approximately 4 feet x 4 feet x 5 feet. Can you please post or mail the google links?
It would be nice of you!
 

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