7I96 vs 7i76e

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11 Jun 2019 19:42 #136643 by ihavenofish
7I96 vs 7i76e was created by ihavenofish
I am building up a machine with a lenovo USFF M90P

The PC will NOT run the mesa 5i25. Something to do with PCI power levels. I can get a PSI Ethernet card for it, so i can run one of the mesa Ethernet cards and still have networking. The PCI card is realtek and the on board Ethernet is intel. I assume its safest to use the intel one for linuxcnc.

The machine will have 4 axes, a tool changing spindle with static tray, and an mpg wheel, limits, and not a whole lot else.
Would i be better off just getting the 7i76e, or will the 7i96 do everything it can do with less IO? The main thing i don't see on the 7i96 is MPG support "yet". Is this on its way soon? (as in, a few months).

I plan on trying to stuff the mesa card INSIDE the lenovo machine to make this machine "cabinetless" so the smaller board is helpful. Cheap is also good :P

Thanks

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11 Jun 2019 19:52 #136647 by PCW
Replied by PCW on topic 7I96 vs 7i76e
You can use a software MPG counter on the 7I96 inputs (a hardware MPG counter is already available in the firmware but still needs driver support)

Note that this will eat into the rather limited 11 inputs on the 7I96 unless you use the (un-isolated/unprotected) expansion port pins

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11 Jun 2019 20:03 #136650 by ihavenofish
Replied by ihavenofish on topic 7I96 vs 7i76e
OK, so i am probably best using the 7i76. I wonder if i can stuff that in the lenovo case.. seems unlikely. I only really have the space where the slim DVD drive was.

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11 Jun 2019 20:08 #136651 by ihavenofish
Replied by ihavenofish on topic 7I96 vs 7i76e
HA, well i haven't opened the PC in a while..

www.megaram.hu/termekek/1100/Lenovo-Thin...er-nelkul-38397D.jpg

It's a full sized cd drive. LOTS of room :P

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26 Apr 2020 05:48 #165624 by rodw
Replied by rodw on topic 7I96 vs 7i76e

You can use a software MPG counter on the 7I96 inputs (a hardware MPG counter is already available in the firmware but still needs driver support)

Note that this will eat into the rather limited 11 inputs on the 7I96 unless you use the (un-isolated/unprotected) expansion port pins


Peter, I think I saw elsewere that there is now driver support in V 2.9. Can you confirm?

Also can you configure the 7i96 with just one MPG?

What are the numbers for the pins that are converted to MPG?

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26 Apr 2020 15:00 #165669 by PCW
Replied by PCW on topic 7I96 vs 7i76e
Yes, the INM module that provides the MPG inputs is supported in LinuxCNC 2.9
The standard INM module has 4 MPGs (you can use as many as you like, they do
not interfere in any way with normal input use)

The inm module also provides hardware filtering/debouncing on the inputs

Standard 7I96 firmware maps the INM pins to GPIO pins 1:1 so the MPG inputs
are the first 8 pins (inputs 0..7)
The following user(s) said Thank You: Clive S

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