Which Mesa Card Should I Buy?

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2 years 2 months ago #308406 by spumco
@JackRay,

Nice machine!

I'm sorry, but I've never used a Pi with Mesa or LCNC.  I think your best bet is to do some searching in the "Computers" sub-forum, and post a new thread in there (or "Driver Boards") specifically seeking recommendations for Pi + Mesa combinations.

I suspect there isn't any difference in Mesa selection if you plan to use an ethernet cable (rather than the RPi-specific 7C80 or 7C81), but someone else should be able to provide more guidance.
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2 years 2 weeks ago #312164 by arauchfuss
Hi I am converting a Tree Journeyman 325 to LinuxCNC. The XYZ analog servo controllers all work so I need 5 encoder inputs: X, Y, Z, Spindle, MPG jog wheel. I have a 5I25 and 7i76 from a previous mill conversion but I don't think they will be useful.
Is a 7I95T a good match? I may want to use the 7I76 for additional IO.

Thanks

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2 years 2 weeks ago #312169 by spumco

Hi I am converting a Tree Journeyman 325 to LinuxCNC. The XYZ analog servo controllers all work so I need 5 encoder inputs: X, Y, Z, Spindle, MPG jog wheel. I have a 5I25 and 7i76 from a previous mill conversion but I don't think they will be useful.
Is a 7I95T a good match? I may want to use the 7I76 for additional IO.

Thanks
You might want to start a new thread if you have further questions, but here's a quick answer:

The 5i25 can work with a 7i77 (or 7i77D) DB25 daughterboard if you want to reuse it.  You'll need a computer with the appropriate slot, of course.

If you want an 'all-in-one' board then the 7i97T is the analog-output board you need, not the 7i95T.  The 7i95T is for step/direction output.

Either of the above options will have enough drive outputs and encoder inputs to work with your Tree.  Note that your MPG, while technically an encoder, does not require the same high-speed encoder input that a servo drive does.  The MPG can be connected to MPG-specific IO on the above boards (taking up two input pins), leaving you with two spare drive outputs and HS-encoder inputs.

I've not personally used Mesa analog-out boards, so please review your drive command signal requirements and verify the above boards outputs and encoder input signals will work with your drives and spindle control.

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2 years 2 weeks ago #312175 by arauchfuss
Ah, you are quite right a about the 7I97T, I was looking at it earlier but got confused when I returned later.

I have a computer that can use the 5i25 but I will probably leave that for another stepper conversion.

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2 years 1 week ago #312701 by JackRay
hello everyone,I have just received my 7i96s board, the 5 axes work correctly with my RPI 4 . but I would like to work with an XYZBC trt configuration . The construction is easy with the configurations already proposed in stepconf . but I have no idea how to convert /establish the same configuration with Pncconf which is MESA oriented but without predefined configuration. Could someone please help me?Thank you
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2 years 1 week ago #312715 by PCW
Replied by PCW on topic Which Mesa Card Should I Buy?
The LinuxCNC parts (kins etc) of the configuration files of a Mesa or parallel
port setup would be basically identical. The per joint low level stepgen setup is
different but that the main change.
 
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