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Rigid Tapping Icon.png

Rigid Tap compatibility:

Use your existing rigid tap programs with confidence knowing that the 527F will tap the same as your legacy control. Re-calibration of the spindle card is recommended, but not always required.


Hardware requirements:
The machine must have a spindle motor mounted encoder with wiring connected to the spindle card. The spindle drive must be rigid tap capable.  

527F Rigid tap set up procedure


The SETP parameters that influence rigid tapping are  GAIN and RAMP.  SETP parameters that have NO effect on rigid tap include XYZ RAMP, JERK, and Z GAIN. 



X, Y and Z must be properly balanced using the  5811 service program.

Run the auto tune function on the spindle drive or confirm that the spindle RPM for M3 and M4 are equal in each



  1. M49 S1000. M3.

  2. Measure the true RPM of the spindle.

  3. M49 S1000. M4

  4. Measure the true RPM of the spindle, must match M3 RPM.


  1. Place an indicator with a small diameter ball between the grooves of the SVT-0077 calibration tool.

  2. Establish the direction in which the pointer rotates when pressing the indicator needle. The following steps assume the pointer indicator rotates CW when the needle is pressed up and CCW when pressing it down.

  3. Load the 6000 service program into machine memory. It can be found

  4. Enter a tapping ramp factor of 100 for the RAMP in SETP. The RAMP value will be fine tuned once the tapping gain has been established.

  5. Using SETP, enter a tapping gain factor depending on the spindle type of the machine. Use a value of 30 for 7500 Wye/Delta or a value of 60 for 10K high/low spindles.

  6. Adjust the Feed Pot to 100%.

  7. Adjust the indicator needle so that it is NOT touching the tapping gauge.

  8. Start the service 6000 program. Allow the spindle to calibrate. When Z moves down for first cycle, press Single Step. Move the indicator into the tapping gauge ensuring that the indicator needle ball fits between the threads of
    the gauge and that the ball of the needle is not touching the wall of gauge.

  9. If the tapping gauge is travelling downward (Z-) and the indicator pointer is CW (to right of 0), the GAIN is too low. Increase the GAIN value if this occurs.  Alternatively. if the tapping gauge is CCW, the gain is too high and should be lowered. Typical GAIN values fall between 5 and 10.  

  10. When satisfied that the pointer stays on zero ~  +/-.001, adjust the RAMP parameter for ideal results through all
    spindle speeds.

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