PMDX Forum
General Category => General Discussion => Topic started by: racline98 on December 03, 2016, 08:07:11 PM
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I'm new to the world of CNC machines and just finished building a 3 axis machine. My machine uses the PMDX 422 board with Mach4. I think the 3 axis motors are configured ok (They jog as they should). The E-Stop is connect to pin 10 and works. I would like to know how to configure the limit switches. Presently I have the -Y +Y switches connected in series to input pin 11, -Z +Z switches connected in series to pin 12, and -Y +Y switches connected in series to pin 13. The input goes to 5v when the limit is reached. Also I would like to use these switches as the home switches. Can someone please advise me? Thanks in advance
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Your current wiring will work fine and is one of many possible configurations.
When configuring your functions in the Mach4 input signals chart, you will
duplicate the settings on the line for each function that uses the same
input. Assuming that you have the Y axis assigned to Motor1, then you
would put the same entries in the Input Signal line for:
Motor 1 Home
Motor 1 ++
Motor 1 --
These lines are not near the top of the Input Signals chart and you will
need to scroll down to see them.
You would enter these settings in the respective columns for each Y axis line:
MappingEnabled green check mark (click to toggle)
Device SmartBOB USB (click in box, then select from drop down list)
Input Name Pin 11 (click in box, then select from drop down list)
Active Low red X mark (click to toggle)
Repeat the process for the X and Z axes.
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I just set it per your instructions and and the limit switches now work.
Thanks
Ron