Re: USB CNC (was Interface. Gauging interest.)

>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, Alan Marconett <KM6VV@>

> >
> > Hi Wayne,
> >
> > So the new one is rev A, and the old one is rev D? Now I'm
> > really confused!
>
> It is confusing. The old one was called "motion" and the
> new one is called "axis4". I didn't think motion really
> conveyed much information about the project, whereas axis4
> really got to the heart of what I was doing. When I did
> the rename, I reset back to revision A.
>
> > You might take a look at a schematic of a LMD18245 driver
> > board. EAS microstep is a good example, PICSTEP is another.
> >
> > http://www.embeddedtronics.com/
> > http://www.fromorbit.com/projects/picstep/index.php
> >
> > Both have source code for the 16F627 one asm, one C. I love it!
>
> The LMD18245 is a great chip, but it is hard to get
> one for less than $13 each in the onsey-twosey purchases
> I do. The much maligned L298 is available from Jameco
> for $2.95 each (quantity 1.)
>
> > You've got quite a lot of thought and work in your system,
>
> Thanks,
>
> > and I really appreciate being able to study your and
> > other's works.
>
> You are welcome. Likewise, I appreciate all of the effort
> you undertake to be the list mom for SherlineCNC.
>
> [snip old vs. new version]
>
> [snip Microchip USB]
>
> > > Bringing up a UART looks to be about 100 times easier
> > > than bringing up a USB connection in terms of the
> > > amount of code required. That is why I ultimately
> > > dumped USB support; it looked like a major project
> > > that could distract me for many many months.
>
> [snip]
>
> > Yeah, I'm seeing it as a major project! But one I need
> > to get up on. I had previously downloaded and had been
> > studying the USB example from Microchip (in C18 tho',
> > I think). Files like cdc.c, usbdsc.c, usbmmap.c
> > etc.). I think someone called Fred mostly ported it
> > over to PICC-18. I have it compiling.
>
> You are much further along than I got.
>
> > I need to get back to that (USB). But as usual,
> > I'm distracted on another project, the Baby PCB Router;
> > and it gets a driver/PS with some nice LMD18245 driver
> > boards using PICs. I have the EAS code for the
> > driver PICs. And now a new piece to put in, a
> > USB-CNC-PARALLEL board!
> >
> > I really like to be "inside" of the various parts of
> > our CNC systems! I do have a stepper running on a PIC,
> > and I intend to "splice" in USB and add a few more
> > coordinated axis. For myself, if nothing else!
> >
> > OK, I may start using Mach, and I may put in someone
> > else's "black box" in my PCB router. But I want inside
> > as many parts as possible!
>
> To further complicate things Microchip released the
> ENC28J60 which is a 10BASE-T Ethernet interface chip.
> My interest in USB sort of evaporated with the release
> of the ENC28J60.
>
> -Wayne
>