7i43 max step freq

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13 May 2011 20:59 #9793 by billykid
7i43 max step freq was created by billykid
someone tell me the maximum step frequency of 7i43h?
I read that is low as parallel port mode.
thanks
mauro

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13 May 2011 23:36 #9796 by andypugh
Replied by andypugh on topic Re:7i43 max step freq
Something like 10MHz. Really far more than any motor can follow.

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14 May 2011 03:43 #9797 by PCW
Replied by PCW on topic Re:7i43 max step freq
I think its like ClockLow/4 so 12.5 MHz with the 7I43s 50 MHz ClockLow. What_is_ slower with the 7I43 (compared to our PCI cards) is EMCs access time to the hardware registers, so servo thread rates over a few KHz are not practical with the 7I43. This is not a problem with the hardware step generator, where a 1KHz update rate is usually fine, as this means that the step _rate_ is updated at 1 KHz, with the hardware
generating the actual pulses (with up to MHz rates).

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14 May 2011 08:48 #9798 by billykid
Replied by billykid on topic Re:7i43 max step freq
Thanks for the quick replies and clear.
Mauro

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