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PCI communication speed
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06-30-2014, 05:52 AM
PMAC2 PCI card
I want to send 1 position command per millisecond from computer through PCI port. Can this be real ?
06-30-2014, 04:53 PM
This could be possible. Can you describe your intentions in greater detail?
06-30-2014, 08:23 PM
(06-30-2014, 04:53 PM)steve.milici Wrote: This could be possible. Can you describe your intentions in greater detail? I want to built a 6-axis parallel robot with fast response. I hope I can send position command from computer at the speed of 1 command /ms. I chose the turbo PMAC2 PCI. Is that ok or do I need a DPRAM option ? If I choose the CLIPPER board. Is its communication speed ok?
07-02-2014, 05:36 PM
PMAC’s minimum move time is 1ms. Using a DPR binary rotary buffer PMAC will be able to accept commands this fast – on the PC side it should be possible. The basic requirement is that PMAC must receive a new command before the deceleration begins in the currently executing move otherwise it will come to a stop on that move and not blend into the next received move. This of course will require the DPR option. It will definitely be faster with a PCI bus version of PMAC but a Clipper may not be able to do this as the USB/Ethernet speeds may limit it. I may be able to run a test over USB/Ethernet.
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