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level head
04-08-2006, 12:56 PM
can somone please tell me how much holding ounce this kit has
-would the motors be strong enough to retrofit a small mill


link
http://cgi.ebay.ca/3-Axis-CNC-Stepper-Motor-Driver-Power-Supply-System_W0QQitemZ7606738118QQcategoryZ78196QQrdZ1QQ cmdZViewItem

John Stevenson
04-08-2006, 01:28 PM
He lists two motors but doesn't say which they are.
The Vexta 266 is 83 oz/in and the 268 are 125 oz/in.
The first motors are a bit small for anything and the 268's would do a sherline and that's about it.
A Taig mill usually uses 200 oz/in to give you an idea.

Evan
04-08-2006, 01:58 PM
I'm using 280 oz motors on my mill project and they will be geared two to one. Those are too small for much of anything except a small engraving machine maybe. As an example, I just scrapped a 11x17" HP 8 pen plotter. It uses 85 in oz steppers.

level head
04-08-2006, 03:58 PM
evan do you know of a good 4 axis driver boards out there

-i cant find much on internet

John Stevenson
04-08-2006, 04:22 PM
There is the Xylotex board.

http://www.xylotex.com

Dan Mauch at Camtronics used to do a kit but he's now only selling Gecko's in a box

http://www.camtronics-cnc.com

level head
04-08-2006, 04:33 PM
i would like to have a 3 axis board for this stepper motors


http://cgi.ebay.com/3-640-oz-in-Bipolar-Stepper-Motor-s-CNC-Nema34-New_W0QQitemZ7607444775QQcategoryZ78196QQssPageNam eZWDVWQQrdZ1QQcmdZViewItem

does anyone know were i could find this board driver

John Stevenson
04-08-2006, 04:45 PM
Whoa.
Take a look on the Camtronics site I listed These motors are $159 each plus $6 shipping.
Those Ebay motors are way too dear.

For a driver capable of running these correctly you will need a Gecko
http://www.geckodrive.com

level head
04-08-2006, 04:51 PM
what do you mean by those motors are way too dear
-at geko website i dont understAND WHAT board to use can you help explain.
thanks

John Stevenson
04-08-2006, 05:01 PM
What I mean by too dear is that are asking too much money.
The ones on Ebay are $267, the same spec motors on the Camtronics site are $159
I make that $108 too dear.

On the Gecko website any of the step motor drives, G201, G202, G210 or G212 will drive this motor

level head
04-08-2006, 05:07 PM
those stepper motors are for 3(ebAY)

so for geko drives you listed i will need 3 of them or 1

i couldnt see any that is all in one board

Rustybolt
04-08-2006, 05:13 PM
Google ClickAutomation for new motor prices.

John Stevenson
04-08-2006, 05:15 PM
those stepper motors are for 3(ebAY)

so for geko drives you listed i will need 3 of them or 1

i couldnt see any that is all in one board

Ooops, smack around the lughole Sir John.
Note to self read ALL the advert :eek:

In which case they are good value :D

Yes you will need three of them.
One problem with the combined boards like the Xylotex is that if you blow a drive and that can easily happen, drives are the weakest link in the CNC chain, then you have lost all three.
On seperate drives if you blow one then you only have that one to replace.

Leigh
04-08-2006, 05:28 PM
Practical Micro Design has a nice 3-amp single motor controller for $73 http://pmdx.com/PMDX-150/index.html
You can download the manual from the site.

John Stevenson
04-08-2006, 05:52 PM
Leigh,
Unfortunately these drives are 3 amp max.
The motors on Ebay that level head is looking at are 5.5 amp.

There are quite a few drives out there rated at 2.5 to 3amp but not many over that, it seems to jump from 3A to 7A in one go.

level head
04-08-2006, 06:00 PM
so what do you think would be my cost after all the motors and drivers are bought .

i wanted to price around $600

John Stevenson
04-08-2006, 06:06 PM
Well doing the sums off the web site we have $267 for the motors and three G201 drives at $114 each comes to $609 I don't know about shipping and sales tax.
Using the G202 drives which are the same as the 201's but have some protection built in we then get $669

Leigh
04-08-2006, 06:09 PM
Hi John,

I hadn't looked at the ratings on the motors in question. PMD does have other driver models.

You'll find a lot of steppers within the 3 amp limit in NEMA 34 size, with substantial power. Power requirements depend a lot on the vintage of the motor. The newer ones are much more power efficient than the earlier technologies.

I'm currently using one of the PMDX-150 controllers with a NEMA 34 stepper, rated 2.8 Newton-meters (400 ounce-inches) torque @ 3 amps.

All of the motors on the Comtronics site up to the 1303 oz-in ones require 3 amps or less, except for the last one.

level head
04-08-2006, 06:14 PM
what kind od driver board and motors are you using
-is it for a mill

level head
04-08-2006, 06:25 PM
is this driver a combo so there are no other boards to attach to it

http://www.pmdx.com/PMDX-131/index.html

John Stevenson
04-08-2006, 06:30 PM
That board is just a connector board to simply the wiring between a PC and the Gecko drives which are extra.
It does have other functions like protection between the PC and the drives and carries the logic power supply.

It's neat and can save a lot of work but it's not necessary to rely on it.

level head
04-08-2006, 06:32 PM
so what do you think is the best deal for a driver,and stepper motors if you were to buy

lenord
04-08-2006, 06:36 PM
You can order whatever oriental motors sells directly from them on the internet. www.orientalmotor.com (http://www.orientalmotor.com)
You can get higher oz/in rated NEMA 23 frame size steppers there, if that is the typical size they use.
They also sell drivers for them. Look in the PK series steppers. pay attention to unipolar or bipolar for the drivers...
I thought clickautomation was for servo motors :confused:

FWIW
:D
Lenord

studentjim
04-08-2006, 06:43 PM
Try this link for driver boardshttp://www.dtllc.com/index.html. No affiliation.

Leigh
04-08-2006, 07:08 PM
is this driver a combo so there are no other boards to attach to it

That board is just a connector board to simply the wiring between a PC and the Gecko drives which are extra.

The PMDX-150 which I mentioned earlier is a complete driver. It attaches to the PC on one side and the motor on the other. There is no additional circuitry required. You do not need or use a Gecko driver with the PMDX-150.

The PC is completely protected from failures of the driver board and/or motor. All connections between the driver and the PC are optically isolated. And the motor power supply is separate and independant of the PC.

John Stevenson
04-08-2006, 07:20 PM
Leigh,
Look back and level head was asking about the PMDX131 and not the PMDX 150

Leigh
04-08-2006, 09:07 PM
Leigh,
Look back and level head was asking about the PMDX131 and not the PMDX 150

I know that, John. That's why I was trying to correct him. That's not the right product.

The PMDX-150 will work with the stepper motor which you recommended, and does not require Geckos at all. It's completely self-contained.

level head
04-08-2006, 11:58 PM
so for the PMDX-150 which is $78 all i will need to add is a power supply and stepper motors

Leigh
04-09-2006, 01:12 AM
so for the PMDX-150 which is $78 all i will need to add is a power supply and stepper motors

That's correct. You need one PMDX-150 for each motor.