EMC with USB?

Hi,

I am new to EMC. From the documentation, I found out that EMC works with Parallel port. Does it also support USB?


Regards,

Anshuman

from the Wiki

wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EMC2_Supported_Hardware

Hardware that doesn't work

* USB devices cannot be used to control motors or perform other "real time" tasks. Some USB devices which appear as keyboards, joysticks, and mice can be used for user interface tasks through the hal_input driver.

Hope that answers your question.

Hi BMG,

Thanks for your reply.


Regards,

Sachin

Hello all,

I'm rather new to EMC but am willing to go the distance to get what I want/need done.

I have been looking into building a USB connected stepper controller board.

With that being said, I have been looking around the forums to see what I'll need to build my own HAL driver for this process.

I noticed this thread and saw the details about USB and was wondering if there is any specific reason "USB cannot be used to control..." or is it just because no one has developed any HAL for such a setup yet?

Does the USB have timing issues for this sort of realtime setup?



Daniel

Hello,

You might want to look at smoothstepper.
www.warp9td.com/

Rick

Rick,

Thanks for the feed back but a minor problem:

warp9 would still require external control hardware. My objective is to build a single board per stepper. That way I can customize the firmware via configuration settings in HAL setup.

My future goal is to have a full setup for CNC machines all connected to one system via USB.

Each controller using a unique serial so each configuration selects specific controllers.


Alex,

That would be perfect if RT-USB is already setup but that link goes to a user locked area (developer.berlios.de/projects/rtusb).

Even after registering for that site the link goes to no project. Either the project never existed on that site or it has since been removed.


The only result from google turned up "RT-USB 32" that was not GNU/GPL ($1,500 just for windows libraries).

Do you have any details about where to find the current RT-USB project?

Sourceforge.net does not list anything either for rtai/rt-usb

Daniel