Newbie question on steppers

[Galdrin]

Hi,

I've just discovered this world of DIY cnc routers as I was searching for a better way to make foam models for lost foam casting and this seams to be the way to go.

I've managed to find some Sanyo Denki steppers and have some questions about them.

They are 4.1 V DC, 1.1 Amp and 1.8 deg/step. 6 wires.

Would feeding it with 5 volts kill the engines? (I'm really not good at electronics) And are they sufficent for cutting foam with no time restrictions?

/Galdrin

[buscht]

You can feed these motors 24 volts without any problems. You should plan on at least 12 volts. Just don't exceed the 1.1 amps.

They would be strong enough to cut foam no problem. Its more a question of whether they are strong enough to move your mechanisms and overcome any binding in the system.

Here's some links
http://www.8linx.com/cnc/cnc.htm
http://www.rcfaq.com/answers/modelbu...ting.htm#LINKS

[Ralliowiec]

Hello,

I was interesed in pc-cnc dremel/router xyz table for quite some time now and this summer I finally decided to get it done. I have my physical layout all drawn up in Solid Works so I know what parts I will be using. Anyways, recently while discussing my xyz table with my boss he remembered of a failed student project that involved an xyz table. The kit, a "Neuractor CNC-II" by Cyance Kit (A Division of U.S. Cyberlab, INC. is a joke, but it did have 4 stepper motors and lead screws that I could use so I decided to take the whole thing. The kit is circa 1992.

Now, my problem is with the stepper motors. They are:

Sanyo Kenki Co., LTD.
Step-Syn
Type:103g770-2516
DC: 4.1 V, 1.1A, 1.8 Deg/Step
Lot No. 8642

From the documentation included with the Cyance Kit it says they are 58 oz/in. My question, with a lead screw setup, is it capable of providing me with enough torque to drive a router on its own base and axis with 2 steppers for my y direction? My idea was to not have a moving table, btw.

Second question: I know what a stepper is and how it works. I (hope I) understand the difference between a uni-polar and bi-polar and phase motors, but, deciding what this stepper is proved to be a challange. Maybe somebody can help me with it. Here are the result of my investigation with an Ohm-meter.

Stepper has six wires: Black, White, Blue, Red, White/Red, White/Blue

Resistance readings go like this:

Black <-> White: 0.6 Ohm
Black <-> Blue & Red & White/Red & White/Blue all roughly 4.0 Ohm
White <-> Blue & Red & White/Red & White/Blue all roughly 4.0 Ohm

Any pair consisting of Blue, Red, White/Red, and White/Blue all read about 8.0 Ohm, no matter which pair.

Can somebody please tell me what type of stepper this is?

Also, based on the wiring how are the phases aranged, eg. ABCD.

Thanks to all for putting up with my lengthy post.

Ralliowiec

[H500]

Looks like a unipolar. Black and white is common. The other are the phases.

[James Newton]

There is a "wizard" at
http://www.piclist.com/techref/io/stepper/wires.asp that guides you through figuring out the wiring based on your measurements.

[zovass]

I have come across on of these kits "Neuractor CNC-II", only the manual is missing.
Does anyone know where I can find the manual? A paper or scanned version would work?

Zovass