Newbie: connect servo drive to computer cheap

If your computer doesn't have a parallel port (or a header for adding one), then you can add a PCI or PCIe parallel port card, or buy something even better, like something from Mesa.
store.mesanet.com/index.php?route=produc...rt=p.price&order=ASC

andypugh wrote:

vasiliy wrote:

Silly me. Turns out my computer does not have parallel port. Lol, when those stopped being standard?!?
Breakout board its is. An recommendations?

You might have a 26-pin header on the motherboard but no back-panel parallel port.

Which motherboard is it?

I checked. There is no connector like that on my motherboard.
So I'm going to spend money on breaker board it seams.
from what I'm reading there are boards which connect to PV via USB, Ethernet and parallel port ( in which case I would have to buy some PCI or whatever card I guess). And there were some comments online that USB is less desirable because of some less real time blah. and I'm assuming ethernet is similar thing plus some lag maybe. And comments about LinuxCNC philosophy being to keep all controls and decision makings in PC as opposed to FPGA where control is outside, Yet I see lots of cards on Mesa which are FPGA and supported bu LinuxCNC.
I'm struggling to make sense of all this. Would you know which way is world going and what is the preferred way to connect nowadays or in the future? I got to figure out which card to buy somehow.

andypugh wrote:

If you want to us LinuxCNC then you can not use USB. There us absolutely no support.

The simplest and best-supported option is PCI, if you have a PCI slot or PCI-express.

Ethernet is another option, but hasn't _quite_ settled down to the same level of support and understanding as PCI at the moment.

I have both. Do you mean pci breaker board or pci parallel port connected to breaker board? Sorry fo being pest, just want to get it right.

This is what I would do, since you do not have a PP port.
If you want to go as inexpensively as possible and have options down the road if you decide to move forward with this project.
I recommend Going with the Mesa 7i92 line of cards which is Ethernet and a inexpensive Break out card, Like a (5 axis CNC Breakout Board with optical coupler for Stepper Motor Driver ) which is 6 dollars.
You can ask around ,about an inexpensive BOB that will match a bit file for the Mesa card,Or one of these good people here may help you get sorted with a bit file.

Or just spring for the 7i76E and be done with it. This card has some good support and getting better.

Ethernet is the way to go , and the way it is going, It has a lot of advantages.

I was /am in the same boat as you, I went with a 7i92H and a 7i76 card because I was thinking of going to servos later on and I could swap out the 7i76 card to do it,
But I will tell you that the teknic motors appear to work so well for what I want to do, I should of just went with a 7i76E, and skip the complex servo drives way of thinking.

Thank you thank you thank you.
I was looking at this for hours and it seemd that linuxcnc does not support those ethernet cards..
Since it does I'll bite the bulled and spend those $200 for ethernet card.I see one huge advantage. I can make ehernet cable of pretty much any length a pull it to any corner of my house.

You could use one of these.
chinaplccenter.com/DDCSV1.1-offline-CNC-Controller.html
I have one but have not put it to use as of yet, It is slick, although they are not main stream and support is slim it looks like.
I believe it runs on linux and would not be surprised if it is some form of linuxcnc.

That one is the second generation, the thing about it is, if it was open and it may be, where some developers could tweak it , that would be great.
Also it is metric only from looking through the menus and if they put a VGA port for a monitor all the better. the little screen on it , is not bad.
When this goes main stream and you what something to just work and cut parts with not much fuss, this will be hard to beat.
You can see it in action here.