step in what direction

[craftech]

I am building a gantry style CNC it is all aluminum with a 36''x24'' work surface the type of work will be wood and aluminum sheet metal and the odd aluminum plate 1/4'' milling work i will have coolant for that aplication
My question is wat tipe of steper should i spec out
Voltage , unipolar ,bipolar vextra ,Amperage degrees, and steps this is confusing because there are so many out ther and i want something strong and easy to configure or replace I a good metal worker but the electronics !!!!
Thanks
craftech

[ger21]

Maybe something like these:

http://www.orientalmotor.co.jp/cgi-b...K&frameSize=85

Use Geckos, wired bipolar parallel at around 30V.

If this is in your budget, you'll get quite a bit of power for a very reasonable price. You could probably get away with a little less power, but you can never have too much power either.

[craftech]

Hey Gerry thanks for the advisse i will look for these type for the project and yes it in the budjet OK and will post the picture and devellopement of the machine

Thanks again

[ger21]

If you look at the thread for InventIt 's router, he uses these motors and can get over 300ipm with 1/2-10 5 start acme screws. If I ever finish my first router, I plan on using those motors for my next one.

Here's the link to InventIt's thread:

My first Router / Plasma Table Buildup...

[craftech]

hey cool pictures what is a 1/2'' x10 5 start 2 pich meen or is this just a threaded rod

[ger21]

Instead of a single thread wrapping around the screw 10 times per inch, there are 5 seperate threads that wrap 2 times per inch. So you still have 10 threads per inch, but you only have to turn the screw 2 times to move one inch. Screw with multiple starts are more efficient than single start screws, sort of midway between single start and ballscrews.