On Mon, 2007-08-13 at 11:29 -0700, Kirk Wallace wrote:
> On Mon, 2007-08-13 at 11:09 -0500, Jon Elson wrote:
> > Kirk Wallace wrote:
> > > I have been having a problem lately. Once every few homing procedures
> ... snip
> > > noticed that the position value at e-stop is in the 300 inch range.
> > > 
> > What firmware rev are you running on the UPC board?  Read the 
> > date code scratched on the EPROM at location U4.  If it is not
> > 5/2/07, then you need an update.
> 
> I need to go out to the shop to check, but I had a stepper controller
> and ordered a pwm prom to convert it about a month or two ago, if that
> helps.
> 
> > If it is that latest firmware, then you are having the same 
> > problem that Stuart Stevenson was having, and it had to do with 
> > some misconfiguration of the index signals between the PPMC 
> > driver and the motion control logic.  Can you send me your ini 
> > and hal files?
> 
> I'll post them on my website and send you the link.

Here is the link to my HNC EMC files: 
http://www.wallacecompany.com/cnc_lathe/HNC/emc/

The PROM is marked with "P 5/2/07".

> > > I plan on setting hal scope up to record what is happening, but in the
> > > mean time, if anyone has ideas for solutions, I would appreciate hearing
> > > about it.
> > Making halscope show position, index and index-enable signals is 
> > most likely going to show what is happening.  Also, for safety, 
> > reduce your FOLLOWING_ERROR to 0.001 and MIN_FOLLOWING_ERROR to 
> > 0.1 inch or something, so this condition will immediately trip 
> > an E-stop rather than running away.
> > 
> > Jon
> 
> Kirk Wallace
> 
> 
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