Re: Working ... but not quite

[robin szemeti <robin-at-rszemeti.demon.co.uk>]

On Monday 16 September 2002 01:40, Ray Henry wrote:
> Robin
>
> You will not get the same pulse rate from Linux and from Dos using the
> same box.  Four KHz sounds good for a 150 machine.  Some report that they
> can get about 15 KHz from 450+ machines with steppermod.  You will get
> somewhat less with freqmod.

oh .. OK  .. better upgrade the box then .. base machines here are 1.7ghz 
anyway now, so assuming it scales linearly then it should be OK.

> It's on the "to-do" list.

OK .. well .. I'll make a start on it for my own benefit, from what I can 
work out. I've parsed the ini file and will volunteer to collate any 
information and format it into html and ps/pdf .. I'll work out what I can 
from the source .. if a couple of people who *do* know whats what could have 
a quick look at http://www.quacky.co.uk/~robin/ini.txt and fill in a few 
gaps (I'll merge any info thats submitted and keep it updated) it should be 
possible to document most of it fairly quickly.

I'd like to document a) 'standard' value from emc.ini, b) the range of 
acceptable values and c) some notes on the effects and constraints etc. (ie 
what it does)

Should it ever become nearly complete it can be merged back into CVS if you 
think it useful.

> Ray
>
> On Sunday 15 September 2002 06:56 pm, Robin wrote:
> > Right ... more questions ..
> >
> > I'm getting 'axis follow' errors when I make rapid traverses (well ..
> > slow traverses .. it quits a long time before it gets anywhere near
> > 'rapid') .. what sort of maximum pulse rate should I be able to
> > reliably get out of steppermod.o and a Pentium 150 ... I need around 20
> > to 30khz to get best performance out of the motors ... I'm not getting
> > much more than 4khz at the moment ... any suggestions?
> >
> >
> > and ... is there a clear and concise explanation of the various terms
> > in the ini file ... ?? I'm struggling to identify all the lines .. the
> > handbook identifies some of the lines but some are undocumented .. am I
> > missing something and theres a big lump of documentation apart from the
> > emc handbook somewhere ... ?? or is this still on the to-do list .. ??
> >
> > many thanks.

-- 
Robin Szemeti