I've got a strange one here.  I'll be running Mach3 and then out of the blue the Pulse Frequency will drop to 100 and the machine stops (well it's moving be very very very slowly).  If I then close the program and bring it back up things run fine for a while.  Normally my Pulse Frequency is around 25353 and stays pretty steady.  My Time to Int jumps around from about 8 to 11. 

The other thing that's odd is if I bring up Mach3 and just let it sit there (no machine or controllers on) after a while it'll do drop to 100. 

So I figured it was the computer, I made sure nothing else was running and it still did it.  Then I loaded Mach3 onto a faster computer (2ghz P4) and just let Mach3 sit there and it did the same thing? 

I'm stumped.



Take it easy,
Jay

On other thing.  I just tested it in Mach2 and it does the same thing.  I just let it sit for a bit and it dropped to 100

Are we talking about Desktop or Laptop processors here.

Graham.

Desktop.  One's a PIII 550 and ones a P4 2ghz.

I think you need to do some optimization... There is a link for it on the Mach Support page here :
http://www.machsupport.com/optimisation%20XP.txt

I'm running Win2K but I did as many as the optimisations as I could and still no luck.  I then reinstalled the software thinking that might help, but no luck there either.

What do you get when you run a driver test?

It seems to run the driver test fine.  Here's a screen shot

That is not that good You may need to reinstall windows... 

It's a fresh OS on that machine.  The thing I don't understand is I've tried to run it on a P4 2ghz and I get the same thing.  But then I run it on my main PC, which is also, a P4 2ghz but a different make and it works fine.  On the two machines that it doesn't work on I've tried switching between standard bi-directional to ECP to ECP+EPP mode in the bios but nothing seems to make any difference.  I'd go out and buy a new cheap pc but I'm a little worried that it still won't work. 

Just as a side note: the P3 550ghz is an old Dell and the P4 2ghz is a home built machine.  The PC that is does work on is (the other P4 2ghz) is also a home built machine but it's got an Intel motherboard.