Switch from mach3 & china BoB to Linuxcnc & Mesa Card Combo

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19 Oct 2020 20:16 - 19 Oct 2020 20:28 #186614 by Sadmeatball
Now i am in the process of upgrading a 4x8 cnc router.I am now using mach3 and chinese bob, but now I want to upgrade using linuxcnc and mesa card combo with ethernet connection and maybe replace my current spindle with ATC spindle and add a rotary axis.

Here is what I use so far:
-4 panasonic servo motor, minas A4 750w (XYYZ) .Z motor w / brake
-3kw watercooled spindle 24000 rpm with huanyang VFD.
-24v NPN proximity sensor for home and limit switch.

I have several questions:
1. Is the 7I76E mesa card right for replacing the Chinese bob I am currently using? Or is there a more appropriate mesa card for me to use?(for the future I want to upgrade the spindle atc and add a rotary axis).
2. I am a little confused about encoder feedback feature on some mesa cards. Could you please explain? My servo motor uses an incremental encoder which is directly connected to the motor driver. Do I need to use a mesa card with this feature? Like Mesa 7I95?

the goal are:
-running with linuxcnc
-use ethernet mesa card
-add the rotary axis (X, Y, Y, Z, Rotary)
-Replace current spindle with ATC spindle

thanks for any input!
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Last edit: 19 Oct 2020 20:28 by Sadmeatball. Reason: Easy to read

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19 Oct 2020 21:21 #186626 by PCW
A 7I76E should work, and no, you don't need per axis encoders.

You will need pullup resistors on the 7I76E inputs to use NPN proximity switches
The following user(s) said Thank You: Sadmeatball

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20 Oct 2020 06:54 #186653 by Sadmeatball
@PCW Thank You Good Sir..

So I guess if i dont wanna use pullup resistor for the Proxymity switch I should buy 7i76ED?

Or I buy 7I76E and change all the proxymity to PNP?

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