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Plans & Info » Instructions & Configuration » Auto Z Touch Plate Instructions
Auto Z Touch Plate Instructions
Auto Z Touch Plate Instructions
The CNC Router Parts Auto Z Touch Plate system allows for quick and precise setting of tools to different work heights.







Using the Auto Z Touch Plate with Mach3
Setup of the Auto Z Touch Plate is fairly straightforward:
  1. Plug the unit in.
    1. For our CRP800 Plug and Play CNC Control Systems (both NEMA 23 and NEMA 34), just plug the M12 connector from your touch plate into the appropriate input for configuration file your are using:
      1. For our revision 16.1 XML configuration file, use the "AUX 1" sensor input (Port# 2, Pin# 9)
      2. For earlier revisions of our XML configuration files, use the "Z" sensor input (Port# 2, Pin# 6)
      3. In either case, you can use a different AUX port if you prefer, although you will then need to re-assign the pin used for the "Probe" function.
    2. For older PMDX-126 based NEMA 34 systems, just connect the two leads on the unit to “Signal” and “Ground” on one of the 3 pin connectors supplied with your panel, and plug into the red input signal board. NOTE, the "Ground" should be the lead connected to the clip, while the "Signal" should be the lead going to the brass puck on the touch plate.
    3. For a DIY system based on the PMDX-126 breakout board, just connect the two leads to an input pin and a common on J11.
    4. For a G540 based system, you will need to wire one of the leads to an available input (pins 1 through 4 on the G540), and the other lead to the G540 power supply common (V-, on pin 12 of the G540). NOTE, the V- connection should be the lead connected to the clip, while the input pin should be the lead going to the brass puck on the touch plate.
  2. Set up the input pin for the “probe”.
    You will need to configure the probe as an active low input on an available open input. The example below shows pin 15 being used, but if you are already using pin 15 for something else (such as a limit switch or estop), you will need to use another available input.

    If you have a CRP800 Plug and Play CNC Control Systems, the probe input should already be set up on Port# 2, Pin# 9 (tied to the "AUX 1" input on your controller), or Pin#6 (in older revisions of our configuration files, tied to the "Z" input on your controller).

    Any changes to pins are made from the Config->Ports and Pins->Input Signals tab.
    CNC Z ZeroTouch Plate NEMA 34
  3. Test the input to insure proper function and pin assignment.
    If you have an Ethernet Smoothstepper (pre-installed in most plug and play packages), go to the diagnostics page under Plugin Control->ESS Data Monitoring. From this menu, you should be able to see an input signal toggle (check mark turn on and off) when you touch the alligator clip to the brass puck of the touch plate. If you do not see the same signal toggling that you assigned to the probe input, you should go back and re-assign the signal. If you do not see a signal toggling at all, contact us before proceeding further.
    Input Signal Diagnostics
  4. Add the Visual Basic code to the “Auto Tool Zero” button
    1. Go to the Operator menu and select “Edit Button Script”; the configurable buttons on the page will start flashing.
    2. Click on the “Auto Tool Zero” button; this will bring up a window with code you can edit.
      CNC Z ZeroTouch Plate NEMA 34
    3. Copy the code below into the editor (replacing any existing code):
    4. Save the file and exit the editor, and then restart Mach3.
    5. If your machine has an aluminum table top, make sure there is something non-conductive between the z touch assembly and the table top to avoid creating a false signal. Before running the routine for the first time, make sure the emergency stop is accessible in case something is set up incorrectly to avoid over-driving your z axis.