[The CNC Man]

Hello
I building a 4ft X 4ft CNC, I'm going to cut wood and aluminum, I was thinking about the HobbyCNC 305oz #23-305-DS8A http://www.hobbycnc.com/products/stepper-motors/
Does anybody know if steppers will work with Gecko G540 and if thy are good motors? if any one knows of a better stepper or a better place to get them I would appreciate it. also do you think 305oz-unipolar 4.2v 3A 8 wire will be enough power.
Thanks very much

[SORCHEROR]

the 540 driver is a bipolar driver,so the stepper motors need to be 4 or 8 wire,i would go to
kelinginc.com they have great prices and good motors

[automationtechinc]

the 540 driver is a bipolar driver,so the stepper motors need to be 4 or 8 wire,i would go to
kelinginc.com they have great prices and good motors

check here
http://www.kelinginc.net/NEMA23Motor.html

[ger21]

Choosing steppers is more complicated than "will these work"? Most 4 or 8 wire Nema23 motors will "work", but for optimum performance, you need to tell us how you are driving the machine, and how fast you want to rapid and cut at, and how much force do you need at those speeds. Different motors can give you very different speeds.

[The CNC Man]

Hello
I'm new to CNC, this is my first build, my ballscrews are 5/8 -5 turns per inch, I think I'm going to use a Hitachi M12VC router or maybe a Spindle from Kelinginc.net or fleabay, I like the idea of the spindle but not sure what I would get into with the water cooling, Kelinginc.net has some package deals with the G540 and four steppers with power supply for $544.95 http://www.kelinginc.net/CNCNEMA23G540Package.html Thats with a 7.3 amp power supply for $80.00 more I can get a 12.5 amp not sure if I need it or not, and I'm in the dark on how much force I need, I know I won't to make some guitar body's and cut some aluminum parts out.

[jschmitt]

this link may help to you an idea as to the force needed and options
http://pminmo.com/mechancial-power

[leggazoid]

www.cncrouterparts.com has pre-wired steppers for a few more $.

[Crevice Reamer]

Hi CNC Man.

Here's my recommendation for your electronics:


$289 G540 http://kelinginc.net/GeckorDriver.html
$147 3 $49 KL23H2100-35-4B 381 oz motors for X, Y & Z
$060 One KL-350-48 48V/7.3A power supply.
$010 Estop switch
$007 3 Home switches
$009 Straight thru parallel computer cable.
-----
$522 Total electronics cost.

$149 Mach3 cost with above purchase.

$671 To spend at Keling. http://kelinginc.net/

This most likely will be the best electronics for your router.

Start by reading this:

http://www.cnczone.com/forums/showthread.php?t=76865.#3

You may also need some other stuff:

You can use THIS wire for motor cables and home/limit switches. Ground the drain wire ONLY at the driver end. (Pins 3,4,5 for motors, PSU Ground for homes/limits)

http://cgi.ebay.com/Stepper-Motor-Wi...item45ecb75966

It also comes in 100 ft roll.

BELDEN 8723-100 STEPPER MOTOR CABLE WIRE

$32 http://www.fullcompass.com/product/305455.html 3 WK SHP

$33? http://www.jameco.com/Jameco/catalogs/c273/P101.pdf

$38 http://www.mcmelectronics.com/produc...100-/36F1033WA

$39 http://www.jameco.com/webapp/wcs/sto...oductId=734180

$40 http://www.markertek.com/Product.asp...&utm_campaign=

$44 http://www.alliedelec.com/Search/Pro...SC=8723+060100

EUROPE http://www.cable-world.co.uk/online.htm


You won't need any db9 motor connectors with the G540, as they come WITH it. The G540 also has circuitry for simple spindle speed control and outputs for dc relays to turn coolant pump (Or router motor) on or off.

These inexpensive relays are very good :

https://www.surpluscenter.com/item.a...tname=electric

You will need one of THESE 1/4 Watt 3.48K resistors for each 381 or 387:

3.48KXBK-ND

Or one of THESE 1/4 W 2.8K resistors for each 270:

2.80KXBK-ND

They only come in a pack of five, so about $1 for 10. With shipping it's about $3.50

http://digikey.com/

Or, in Canada:

http://digikey.ca/

You will also need an estop switch, Home/limit switches, Helical couplings and a 6 foot "straight thru parallel port cable. These are all available from Keling:

http://kelinginc.net/CNCPackage.html

The G540 is so small that many are mounting theirs INSIDE the computer case.

Camtronics has a case MADE for the G540:

http://s120220635.onlinehome.us/stepper-components.asp

CR.

[Praymond1209]

I am building a Router using the G540 Drive and see reference to a Set resistor installed on the G540 Drive but i also see here reference to a resistor installed for each drive?
Any help would be appreciated.
Thanks, Pat

[rowbare]

Pat,

Each drive needs a resistor to set the current limit for the motor. This resistor is installed between pins 1 and 5 on the DB-9 connector that you will plug into the drive. There are no resistors installed on the drive itself.

bob

[Praymond1209]

Bob,
Thanks for the info, I should nave read the Gecko info better, you explained it very well.
Thanks, Pat

[Tommangod]

I've been struggling with a similar issue re the G540.
Now that I got my resistors correct, I don't think it matters much. It's more about your jobs and what material you are working on.
And you PS
I'm just using some poor and medium quality 2.0A Nema 23 steppers right now, and a 24v 12A PS, and they will push through soft wood just fine, a bit slowly.
I plan on using a cutting laser, so they will be perfectly adequate for my application.

[Tommangod]

I've been struggling with a similar issue re the G540.
Now that I got my resistors correct, I don't think it matters much. It's more about your jobs and what material you are working on.
And you PS
I'm just using some poor and medium quality 2.0A Nema 23 steppers right now, and a 24v 12A PS, and they will push through soft wood just fine, a bit slowly.
I plan on using a cutting laser, so they will be perfectly adequate for my application.

Oh. I wanted to add. The machine I bought had the wrong resisters on the original POOR quality 2.0A steppers. So they were running at 3.5 amps and one burned out, and caused the G540 to blow its fuse.
I had a pretty good quality Nema 23 sitting around, that I got for 17 bucks(You can get steppers for almost literally nothing on eBay). I fused it at 2.2A(and I'm a e-dummy) and it's like cold unsalted butter, and stronk as a dairy cow.