TP20 and TP200 Touch Probe Check

Owned by Hanno Mueller, created
Last updated: Jan 16, 2024
3 min read

This article includes instructions to troubleshoot the touch probe on Post 2020 Machines featuring a PH6 probe head and a TP-20 or TP-200 probe module.

Problem

The following picture shows the LED on the PH6 probe head:

The following pictures show the LED on the TP-200 probe body in both states:

 

Debugging Steps

Perform the following step in case the touch probe does not trigger or if the device exhibits unintended behavior.

  1. Check the lights of the probe module and probe head when attaching and touching the probe carefully with a finger.

    1. For TP-20:

      1. The PH6 LED should be off when the TP-20 module is not attached

      2. The PH6 LED should be on when the TP-20 module is attached

      3. Touching the TP-20 module should blink the PH6 probe head LED off, regardless of whether the touch probe is the active sensor in InSpec or not.

    2. TP-200:

      1. The PH6 LED should be on when the TP-200 module is not attached

      2. The PH6 LED should be on when the TP-200 module is attached

      3. Touching the TP-200 module when InSpec is not set to touch probe should cause:
        the PH6 probe head LED not to blink but it will remain on
        the TP-200 probe module LED should blink

      4. Touching the TP-200 module when InSpec is set to touch probe should cause:
        the PH6 probe head LED to blink off
        the TP-200 probe module LED to brighten by an amount commensurate with the probe force as it is deflected.

  2. Check the DIP switches of the PI-200 probe interface. Accessing this box might require disassembling parts of the machine and should only be executed by Micro-Vu dealers.
    The following image shows the position of the PI-200 on a Vertex machine:


    The following image shows the position of the PI-200 on an Excel machine:


    When the PI-200 box can be accessed, the DIP switch configuration should be compared to the reference which is presented below.

     

     

Possible Error Causes

The following table presents possible error causes based on the test results

 

Scenario A

Scenario B

Scenario C

Scenario D

Scenario E

 

Scenario A

Scenario B

Scenario C

Scenario D

Scenario E

PH6 LED

never on

never on

always on
(even if not touched)

always on
(even if not touched)

correct

TP-200 LED

 

 

 

always on /never on

correct

PI-200

successfully detected

not detected

 

 

successfully detected

Check if

PH6 is defective

PI-200 is powered

PI-200 is connected correctly to:

  • PH6

  • Logic Board

PH6 is defective

TP-200 is damaged

PI-200 or the cable between the PI-200 and the Logic Board is functioning
if the machine is not functioning correctly when operating the touchprobe (like not backing off if touched)

 

Related articles

  1. Additional information and instructions to perform testing with a TP-200 in motorscope can be found at Checking the TP-200 Touch Probe State

  2. The TP-20 and TP-200 touch probe installation manual is available at:
    Touch Probe TP20 and TP200 Installation Manual

Product information is subject to change without prior notice as a result of ongoing technical development