TMC Probe Part Option

Renshaw OMP40-2 Optical Machine Probe Manual

Renshaw OMI-2T Manual

31551_TMC Service Manual

34050-2_PROBE-CAT40-TMC

34080-10_RECEIVER ASSY-OMI-2T

34080-1_PROBE-OMP40-2

34080-5_STYLUS-PROBE-100MM

The OMP40-2 probe communicates using infrared optical transmission, requiring a direct line of sight (LOS) to the OMI-2T receiver at all times.

Code 124 – Probe Part Calibration

• Used to calibrate the part probe.

Renishaw offers a mobile app to assist with probe setup:

Apple App Store: Renshaw Probe Set-Up App

Google Play Store: Renshaw Probe Set-Up App

• Use a flat head screwdriver to remove the battery cover from the OMP40-2 probe.
• Take out the batteries, wait 5 seconds, then reinstall them and secure the cover.
• Do not allow coolant or debris to enter the battery compartment.
• Watch for the LED to flash red, then green, then blue.
• When the blue LED appears, deflect and hold the stylus to enter configuration mode.
• Do not remove the batteries while the probe is in configuration mode.
• To exit configuration mode, leave the stylus untouched for 20 seconds.
• Battery status will flash: 8 red = good, red + blue = low.

• While still holding the stylus deflected, the switch-off method will be displayed via LED flashes.
• Release the stylus when you see two red flashes followed by a long red flash.
• To cycle through switch-off options, deflect and release the stylus quickly (1 second).
• When the correct setting is shown, deflect and hold the stylus for 4+ seconds to continue.
• The trigger filter menu will display as two green flashes followed by a long red flash.
• Deflect and release the stylus to cycle through available trigger filter options.
• When the correct setting appears, deflect and hold the stylus for 4+ seconds.
• The probe will automatically move to the next configuration menu.

• The optical transmission method menu will display.
• If the probe flashes a color other than blue, deflect and release the stylus (1 second) to cycle through settings.
• Once the probe flashes only blue, deflect and hold the stylus for 4+ seconds to confirm.
• The optical power setting menu will now appear.
• Deflect and release the stylus until you see two yellow flashes followed by a long red flash.
• Leave the stylus untouched for 20+ seconds to save and exit configuration mode.

Before You Begin

• Complete XYZ laser calibration and backlash adjustments.
• Confirm Service Codes 123 and 128 have been performed.

• Set the machine to metric mode.
• Ensure the machine is in PRODUCTION OPS mode.
• Keep the Feed Rate Override at 100% when running the service code.
• Run the service code with the door closed.
• Always insert the probe in the same orientation relative to the spindle dogs.
  • Calibration values depend on the angle at which the probe triggers.
  • Measuring in a different orientation than calibration will cause significant inaccuracies.

1. Install both the probe and optical receiver.

• Have the ring gage and dial indicator ready.

2. Perform Stylus Runout Adjustment.

• Load the OMP40-2 into the spindle.
• Mount a dial indicator to the table and contact the stylus tip.
• Rotate the spindle by hand to check runout.
• Adjust the lower four flat screws in opposing pairs to reduce runout.
• Adjust the upper two pointed screws to fine-tune.
• Repeat lower & upper screw adjustments as needed.
• Target Calibration: ±0.0001".

3. Check probe stability.

• Perform the runout check with a non-probe tool active in the DRO to avoid triggering the probe.
• Use only the first 0.001"–0.002" of indicator travel to avoid stylus deflection.
• After adjustment, switch DRO back to the probe tool.
• While the indicator is still on the tip, push on the lower portion of the probe body (LED section, not the stylus).
• The indicator should deflect and return exactly to zero run-out. Test in multiple directions.
• If it does not consistently return, tighten the tool holder or other set screws until stable.

4. Place the ring gage in the vise and tighten finger tight (≈10 in-lbs).

5. Use the dial indicator on the spindle to locate exact XY center of the ring gage within 0.0001".

• Set X and Y zero here.

6. Run Service Code 124 for XY calibration.

• Determine the exact ring gage size to 0.001 mm (use marked size, do not measure).
• Nominal stylus diameter = 6.000 mm (0.2362").

7. While running Service Code 124, ensure:

• The machine is in PRODUCTION mode.
• The probe tool is active in the DRO.
• The spindle will orient during the calibration cycle.

Note: Not being in PRODUCTION mode will cause a fault.

8. After calibration, save the values.

• The system checks all 12 measured points (30° intervals).
• Each must be between 0.001 mm and 0.200 mm.
• Failure likely means probe tip run-out or incorrect XY zero.

9. In DRO, obtain a plastic shim (~0.010").

• Mic the center for accuracy (avoid burrs on edges).
• Lower Z over a flat reference surface (table, vise, or 1-2-3 block).
• Adjust until probe tip is just above the surface by shim thickness.
  • If drag is felt, raise slightly.
• Set Z to shim thickness in DRO.
• Adjust in 0.0001" increments.

Note: If no shim is available, use a gage block or 1-2-3 block.

10. Being 0.0001–0.0002" too high is acceptable.

Being too low will cause calibration failure.

• Probe typically triggers at 0.005–0.020 mm in Z.
• Z values must be between 0.005 mm and 0.200 mm.

11. Raise head ≈6 mm (0.25") and run Z calibration with SC 124.

• Monitor Z on DRO — the lowest number seen should be negative.
• If not negative, calibration will fail.

12. Save Z values.

13. XY Check:

• In DRO, use CENTER/CIRCLE function multiple times.
• Verify with dial indicator — center should be within:
  • ±0.0001" to ±0.0002" depending on accuracy of procedure.

14. Z Check:

• Mount a dial indicator on the spindle base, contacting the reference surface.
• Use the probe to touch the surface.
• Move Z up/down, probing the surface each time.
• Indicator should repeat within 0.0002" (0.005 mm).

• Any error in calibration will be reflected in all future probe measurements.
• If another active probe is nearby and its transceiver can “see” your machine’s transceiver, errors may occur. The software should detect and warn.

Use Service Code 521 (Hardware Tester) to verify that the probe and related inputs/outputs are functioning correctly.

In normal operation, the probe will not power on unless the software detects it is loaded in the spindle. This is to preserve probe battery life.

When using the Hardware Tester, this restriction does not apply, since the main ProtoTRAK software is not running.

1. Enter Service Code 521 on the pendant.

• Save and close any open work when prompted.
• Press [Connect]— the “Not Connected” box should disappear.
• Select the correct machine from the dropdown menu.
• There may be up to a 10-second delay before the tester is ready.

2. Prepare the control for probe testing:

In the right-most Inputs/Outputs column, select:

• [NC Ready]
• [NC Ready 2]

This should cause the NC Ready State 1 and NC Ready State 2 indicators (blue circles) to light.

If they do not light, ensure the [E-STOP] is released, then press and hold the [POWER RESET] button until both indicators are lit.

(Selecting Motion Allowed is optional — only required if you plan to move an axis.)

3. Enable the probe:

• Select [Probe 1 Enable (P54)].
• Expected behavior:
  • Probe Error (Active Low – P68-5) → Enabled (filled circle) = No error.
  • Probe LED blinks green.
  • Receiver LEDs: 1 green LED on the left, 2 green LEDs below (communication OK).

4. Trigger the probe:

• While the probe is enabled, deflect the probe stylus by hand.
• Expected behavior:
  • Probe Error (P68-5) remains enabled.
  • Probe Trigger 1 (P68-2) and Probe Trigger 2 (P68-3) enable (filled circles) while deflected, then return to inactive when released.

To reset the probe deselect [Probe 1 Enable (p54)], wait 5–10 seconds, then reselect it. This reinitializes the probe.

If [Probe 1 Enable (P54)] is selected and the probe battery is removed or the receiver cannot see the probe:

• Receiver LEDs will show: 1 green LED on the left, 3 red LEDs across the bottom.
• Probe Error (P68-5) will deactivate (empty circle) → fault condition.
• Probe triggers will not respond.