Need Help!- electronics

[dreamci]

hello i am building a cnc machine i have built the mechanical parts now i need the electronic parts i clicked one of the advertisement on this site and saw that there are lots of electronics and i am confused i want to ask if i need these parts all to use my machine

* Qty 3- Geckodrive 201 - 10 uStep/Step 7A Drivers
* Qty 2 - Stepper Motors - NEMA 34 - 450 oz-in Motors (S34HT450-S)
* Qty 1 - Stepper Motor - NEMA 23 - 260 oz-in Motor (S23HT260)
* Qty 1 - Power Supply - P500-3020 - 30 Volt 20 Ampere Power Supply
* Qty 1 - Breakout Board - S3BRK2 - High I/O Count Breakout Board

and if i need these all can u give me some alternative shops that i can buy thank you

[ger21]

http://kelinginc.net/

[dreamci]

thank you but can u also tell me which ones i should buy i dont have much money so i want to buy the only ones that makes my machine run. thanks

[blackbeard52]

Well you would have to tell us what machine you are building? A CNC is too broad of a subject.

[dreamci]

i am building a cnc router that i will use it to shape some woods

[neilw20]

dreamci.

Your list is about the minimum you need to do anything useful.
Cars have 5 wheels. Steering wheel missing means new concept required.

Don't forget a PC or Laptop, minimum 1Ghz, parallel port, 1/2G ram. and a Mach3 license if you run more than 500 lines of g-code, which you will unless your are making simple circles etc.

[dreamci]

thank you neilw20 that answer was what i needed i wanted to learn if it was minumum

[ger21]

Choosing the correct motors is not quite that simple. You need to take into account how the machine is driven (leadscrew, rack and pinion, belt drive), any gearing used, how much weight your moving, and how fast you want to accelerate and travel at. Only then will you know what motors you'll need for the machine to do what you want it to do.
You can find motor sizing software and formulas at motor manufacturers websites.

[dreamci]

can u give me an adress to calculate motor size . thanks

[acondit]

Originally Posted by dreamci can u give me an adress to calculate motor size . thanks

I am attaching a "Word" file that contains the text of a message that Mariss Freimanis wrote to help someone figure out what motors and gearing to use on a machine. You can learn a lot by studying the formulas that he used.

Alan

[dreamci]

hi i still couldnt understand which ones to buy. i know i have to buy three stepper motor,a power supply, a breakout board, and a 3 axis driver but i am confused which ones i should buy i know nothing about electronics these biopolor unipolor or something confuses me i dont want to buy something wrong bec i have very little budget
here is the cnc i am making can anyone experienced tell me exactly what i should buy(must be minumum bec i want it to be cheap) i have written the dimensions so you can help better. thanks (its made of mdf and the angles are aliminium)

[blackbeard52]

dreamci

While I admire your desire to build from a scratch design to save money, I believe you should use a proven design to save money for the first one you build. A Joe's design, Buildyourowncnc, or any other of a dozen free plans available on the web or on here is the best way to get your feet wet. There will definitely be another machine in your future no matter what size you build. Using a proven design lets you get in with the least amouont of money (no mistakes therefore scrapped ideas). There are even designs that give you all the supplies available for assembly. You know up front the costs. You arent giving us enough information to give much of a suggestion as to materials needed. such as construction materials for table, leadscrews, weight of gantry, materials to be cut. It appears that your design would fit any of the above mentioned machines. And those have motor sizes and screw pitches, ect in the Bill of materials.

Bob