MESA 7i96S STEP DIR I/O compatibility

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2 years 3 months ago #304131 by cncproject2024
Hi, I am building a CNC adhesive dispenser. Two closed loop stepper motors will be used to control the X-axis, one will be used to control the Y-axis and one to control the Z-axis. Here are the 4 motors: P Series Nema 17 Closed Loop Stepper Motor 72Ncm(101.96oz.in) with Encoder 1000PPR(4000CPR) - 17E1K-07|STEPPERONLINE (omc-stepperonline.com) And here are the 4 drivers: Closed Loop Stepper Driver V4.1 0-8.0A 24-48VDC for Nema 17, 23, 24 Stepper Motor - CL57T-V41|STEPPERONLINE (omc-stepperonline.com) I was wondering if these motors and drivers will be compatible to interface with MESA 7i96s: eusurplus.com/index.php?route=product/product&product_id=159 and LinuxCNC. And additionally if this is the most suitable MESA card choice for my build (note that I might also need to connect up an additional motor and driver). I am working on doing this for my company (budget isn’t an issue) but I am very hesitant to buy anything without being certain that it is the right choice. And yes I have read the description that the 7i96s can control up to 5 stepper motors, I just wanted some extra clarification from someone with more experience on the topic as I am only a couple weeks deep into learning about CNC.Any help would be greatly appreciated.

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2 years 3 months ago #304135 by tommylight
All drives that take step/dir or pulse/dir signals work with Mesa 7i96S and other Mesa boards, be it single ended or differential inputs as Mesa can do both.
And you can add a Mesa 7i85S to 7i96S and have 4 more stepper outputs, add a 7i84 and get 32 inputs and 16 outputs.
If you do add 7i85S, get also the required cable.
7i84 can be wired with a normal LAN cable cut in half.

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1 year 10 months ago #317669 by xenon-alien
Hello!
Can the 7i96s card handle CW +/- and CCW +/- instead of step/dir?
I need to control a Mitsubishi mr-je-40a servo drive I
The drive smarter then me, so, I'm not sure... Maybe the servo can the step/dir too, but not figured it out yet how.

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1 year 10 months ago #317670 by tommylight
If you mean CV and CCV quadrature steps, then most probably yes, and the only thing required should be to change the stepgen type in hal to type 1 or 2 (i forgot what exactly).

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1 year 10 months ago #317671 by xenon-alien
Found something.
Left to figure out how to set it correctly. It looks like the step dir is also supported in this drive.
 

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1 year 10 months ago #317673 by tommylight
OK the drive does all 3 types and so does LinuxCNC with Mesa.
Drive modes from your pictures are:
0 = up/down step pulses
1 = step/dir
2 = quadrature
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LinuxCNC modes:
0 = step/dir
1 = up/down
2 = quadrature

linuxcnc.org/docs/html/man/man9/stepgen.9.html

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