[Don Kellogg]

I'm starting a 4x4 build and I'm going all out 3 1/4 porter, with gecko 203s and 570 motors. But I've run into an issue what PSU should I use for those drivers and motors?

Is this one big enough

http://www.antekinc.com/PS-5N70R.pdf

or should I go with

http://www.antekinc.com/PS-15D70R.pdf

Or maybe something on this page.

http://www.kelinginc.net/SwitchingPowerSupply.html

I'm eyeing this one KL- 7220 Specification: $189/pcs
Unregulated Power Supply 1440W, 72VDC/20A ,120VAC or
230VAC

This is the one area I'm not really sure about. I'm not really too worried about the price just want to make sure I have enough power and a little head room.

[CNCfun&games]

HI
More info req'd to determine PWR Supply spec's.
Please post the Motor Amps, inductance, and qty used.

Regards....W. Smith

[Don Kellogg]

Hope this helps.

4 Motors
4 Gecko 203vs
Not sure of the BOB just yet.

[ger21]

If you wire the motors parallel, you want a 48Volt supply, and about 4 amps per motor will give you a little headroom. Parallel will give the best performance.

[Crevice Reamer]

All of the power supplies that you list are too large for those motors. The motors best voltage is around 49 volts. The Keling KL-5020 should be fine.

CR.

[CNCfun&games]

Jerry & CR are right!!!

Here are the calculations so you can verify your assumptions.
Current: 5A x 4 motors=20A x .67% =13.4A
Vmax(Motor)=(SQ RT of Inductance) x 32=1.516 x 32= 48.53Vmax.

In some cases the Pwr Supply Capacitors may not be sufficient for your application.
so check total Cap, against this formula.

Capacitor Selection:C=(80000. x 13.4A)/48.53V = 22089uF

Good luck....W.Smith

[Crevice Reamer]

I should have mentioned that, (Because steppers at rest are drawing current and this lowers the output voltage somewhat.) with three or four motors connected--NO individual motor will receive more than 48V from the 50V power supply.

CR.

[ifeliciano]

Jerry & CR are right!!!

Here are the calculations so you can verify your assumptions.
Current: 5A x 4 motors=20A x .67% =13.4A
Vmax(Motor)=(SQ RT of Inductance) x 32=1.516 x 32= 48.53Vmax.

In some cases the Pwr Supply Capacitors may not be sufficient for your application.
so check total Cap, against this formula.

Capacitor Selection:C=(80000. x 13.4A)/48.53V = 22089uF

Good luck....W.Smith

Resurrecting....So to drive the Green Monster stepper from Probotix with Gecko 203's, I'll need an 83V power supply ?

6.8mH inductance

[Crevice Reamer]

Yep! The Green monster is not very efficient.

What is it that you want to power with your motors?

CR.

[ger21]

Yep, that's correct. If I recall correctly, the motors Probotix sells have rather high inductance. This is because they are low current motors to work with their lower current drives.
The best performing motors have high current and low inductance.

[ifeliciano]

Yep! The Green monster is not very efficient.

What is it that you want to power with your motors?

CR.

Im looking into Joe's 4x4. Have not bought plans yet. I want to get the electronics chosen and built first.
Would like to use the Gecko 203 drivers and have a 48VDC 15amp P/S.

Any recommendations on motors ?

[Crevice Reamer]

You haven't said anything about how you are going to drive the axes so this could change but generally you can probably use a G540 controller, 270 oz N23 motors for X and Y, a 387 oz motor for Z and a 48V 7.3A power supply.

$299 G540 http://kelinginc.net/GeckorDriver.html
$078 Two $39 KL23H276-28-4B 270 oz motors for X & Y
$049 One KL23H284-35-4B 387 oz motor for Z
$060 One KL-350-48 48V/7.3A power supply.
$010 Estop switch
$007 3 Home switches
$009 Straight thru parallel computer cable.
-----
$502 Total electronics cost.

$149 Mach3 cost with above purchase.

$651 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

CR.

[ifeliciano]

Thanks for the information.

$299 G540 http://kelinginc.net/GeckorDriver.html
$078 Two $39 KL23H276-28-4B 270 oz motors for X & Y
$049 One KL23H284-35-4B 387 oz motor for Z
$060 One KL-350-48 48V/7.3A power supply.
$010 Estop switch
$007 3 Home switches
$009 Straight thru parallel computer cable.
-----
$512 Total electronics cost.

$149 Mach3 cost with above purchase.

$661 To spend at Keling. http://kelinginc.net/

The power supply, Estop, home/limit switches, and cabling I have so that is some savings there. I believe I need an extra motor for either X or Y not sure, but I read that Joe's 4x4 hybrid has two motors on one axis.

Mach 3 maybe down the line. I'm looking into public domain software now. Either DOS or Linux.

Thanks for the link, it is very usefull information for us noobs

I figure this is what I would need for the moment.

$299 G540 http://kelinginc.net/GeckorDriver.html
$117 Three $39 KL23H276-28-4B 270 oz motors for X & Y
$049 One KL23H284-35-4B 387 oz motor for Z
--------
$465 Total electronics cost

[Crevice Reamer]

Keling gives a $10 discount on G540 when purchased with motors, so $455 Total.

If you are slaving 2 270s on one axis you will need 48-50V PSU to be at least 10A.

Mach3 download is free, with only limitations on max lines of code, (500) and max PPS. (25K)

CR.

[ifeliciano]

Will Auto Tool Zero work with the built-in BOB of the G540 ?

[Crevice Reamer]

Will Auto Tool Zero work with the built-in BOB of the G540 ?

G540 has 4 TTL inputs.

CR.

[ifeliciano]

G540 has 4 TTL inputs.

CR.

Awesome ! I really appreciate your help.

:cheers:

[ifeliciano]

G540 has 4 TTL inputs.

CR.

I jump the gun on this one. TTL 0-5V, so is that a yes it will work with Auto Tool Zero ? :drowning:

[Crevice Reamer]

I jump the gun on this one. TTL 0-5V, so is that a yes it will work with Auto Tool Zero ? :drowning:

Inputs are inputs. You have 4 to do with as you choose. It SHOULD work. What does the Tool Setter require?

Can you give Tool Setter Link?

CR.

[ifeliciano]

Inputs are inputs. You have 4 to do with as you choose. It SHOULD work. What does the Tool Setter require?

Can you give Tool Setter Link?

CR.

The erniebro http://www.cnczone.com/forums/showthread.php?t=56079
Or the Ausie. http://www.cnczone.com/forums/showthread.php?t=36099

I know it will be a while before I buy Mach 3, but I just might get the demo and play with it a bit.