On Fri, 2007-12-14 at 16:50 -0800, Kirk Wallace wrote:
> On Fri, 2007-12-14 at 14:46 -0600, Jon Elson wrote:
> > Kirk Wallace wrote:
> > > I need to use my mill manually while I am converting it to EMC. Because
... snip
> > > I looked at my .hal files
> > It's not there, it is in the .ini file.  Change FERROR and 
> > MIN_FERROR to 100.0 and you shouldn't have the problem.
> > 
> > Jon
> 
> Yea, thats what I meant, those configuration thingies. I put 100 in for
> FERROR and MIN_FERROR and it works fine. Kind of takes the wind out of
> my pvVCP sails.

Well I got out to the shop and tried using the pyvcp DRO. I found a few
problems. 

In my .hal file I referenced the wrong .xml. This should be fixed now. 

The .hal file uses the xor2 component, which is not in EMC 2.1.7. I
changed the mill's Synaptic repositories and updated to 2.2 and the
component now works.

Then I found that the <scale> tag would visually function properly but
the halpin tag would fail with a "pin 'pin_name' not found ... link
failed". The only thing that worked in the long run was to switch to
<spinbox>. Is there a known problem with <scale>?

Apparently, "loadrt hal_ppmc extradac=0x00" is not enough to get the UPC
working. As soon as I hit "addf ppmc.0.read fast" the PC would lock up.
I had to unplug the computer to reboot. Can the UPC encoder counters and
DAC be run only using HAL?

Now that FERROR and MIN_FERROR settings have allowed me to start making
chips, it's not that important for me to complete the DRO/VFD project,
but the knowledge gained may come in handy in the future. For the price
of a PCI parallel port, some junk box parts and HAL, someone could
probably do allot with EMC before jumping into axis control.
-- 
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/ 
Hardinge HNC lathe,
Bridgeport mill conversion, doing XY now,
Zubal lathe conversion pending)


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