Diameter, Pitch, Number of Teeth, etc. on Spur gear?

[TheNotchJohnson]

i appreciate your advice, and it was informative. but if it was you, and you had to choose the system, and controllers, steppers, what would you use? im understanding that there are negative flaws with the system i was looking at, but if you have any advice let me know. Im trying to accuratley mill aluminum castings. I have noticed that some people use screw drive systems instead of gear racks, is that a good idea? As of now i was going to gear up that motor with 1:3 ratio to give it extra tourqe, i did the timing with pinions and mounted bearings (designed a timing box in essence). Any help is appreciated. Thank You.

[Torchhead]

I'm confused. You posted in the Plasma Cutting section and the assumption was you were going to cut using plasma. Your last post talks about milling and accuracy...totally different subject and CNC approach. Leadscrews and plasma don't mix well. They work fine for milling. I won't give advice on controllers or electronics on list because those are products I sell.
So do you want to do milling (maybe in 3D) or cut flat casings with plasma?

TOM CAUDLE
www.CandCNC.com

[TheNotchJohnson]

Im interested in 3D milling. I work on motorcycles alot and want to be able to cut parts for certain applications. I am hoping to take aluminum castings and have a cnc machine do automated milling. I am very good with cad and have good math skills. I figure with the right resources I can build a cnc to suite my needs. I just dont want to invest in a design without confirming its going to work properly, in a mathmatical sense. At this point im looking for technical data and resources that will help me better understand the calcualtions on speeds and feeds, rpm and torque values, ect. maybee some charts explaining requirments on different alloys, things of that nature.
For example, when I am choosing a recirculating ball nut shaft, how do I choose the right diameter and pitch, ect. or when gearing up a stepper motor, how to determine the right ratios for the design.
The issue I am having is finding a resource for this information, if you know of a fourm, website, or even a book with such data, let me know. Thanks.

[dave22]

help please

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Im interested in 3D milling. I work on motorcycles alot and want to be able to cut parts for certain applications. I am hoping to take aluminum castings and have a cnc machine do automated milling. I am very good with cad and have good math skills. I figure with the right resources I can build a cnc to suite my needs. I just dont want to invest in a design without confirming its going to work properly, in a mathmatical sense. At this point im looking for technical data and resources that will help me better understand the calcualtions on speeds and feeds, rpm and torque values, ect. maybee some charts explaining requirments on different alloys, things of that nature.
For example, when I am choosing a recirculating ball nut shaft, how do I choose the right diameter and pitch, ect. or when gearing up a stepper motor, how to determine the right ratios for the design.
The issue I am having is finding a resource for this information, if you know of a fourm, website, or even a book with such data, let me know. Thanks.


All of the information you require is scattered throughout this forum - read read read!!!

Also check out the MechMate Forum, without a doubt the most complete and detailed CNC Router/Plasma Table plans and build logs on the Internet. Every detail of building a 4'x8' (size can easily be reduced or enlarged) gantry style router table.

http://www.mechmate.com/

I should also mention that the site is run by one of the most giving people I have ever come across on any forum.

Good Luck with your design and build.