EMC or Mach 2?

[grebator]

I still didn't decided which one is beter.
Why?
If i install Mach 3 on Pentium III 1Ghz i get 35000Hz .This i read from manual.So ,if i will have encoder with 4000pulses per revolution this will give me 0,0025mm resolution.I have ball screws pitch 10mm/revolution and gear reduction 2,5:1
After calculation (35000/(4000*2,5)=3,5 ) and multiply this by 10 i get 35mm/s or 2100mm/min
From this i would have max rapid speed 525 rev/min of max possible 3000!!
Thats nothing.

Now,how it's with EMC ?
Will i have more than 35000Hz (pulses/second)?

P.S i will use Celeron 500Mhz procesor

[samco]

A) mach doesn't do encoders.. see note 1

2) Your pulse rate depends on the computer. I was getting 50k base threads on a 600mhz pentium 3 - IIRC that was pushing it. (the computer gets sluggish the faster you try to push it.) This means - either you could run steppers at 25khz (base thread/2) or you could read encoders at near the base thread speed (near 50k)

now if you get external hardware - you could count encoders much much faster than that.

you can look at my thread where I started looking at using just the printer port to run servos. - it is very doable.
http://www.cnczone.com/forums/showthread.php?t=25929

The real question is - do you mean 'encoder' or 'stepper'.. Or maybe 'what are you trying to do'

Note 1. mach needs external hardware like geckos to run servos. Mach is really a step and direction program. (This is a broad statement - others should expand on it as I have no experience with it)

[grebator]

I will use servo motors with rotary encoders.
Rutex servo drive
C10 bidirectional breakout board from cnc4pc.com

Where are actualy limitets: for outputs from PC or inputs to PC?

If i would have to buy an external hardware for much highter resolution give me a link of manufacturer