Description[edit | edit source]
The Renishaw head is an electronic auto-detecting head for the Coordinate Measuring Machine (CMM). It is an add-on for the CMM which increases utility and simplifies operation (especially for a single operator).
Principle Uses[edit | edit source]
- Simplifies CMM operation
- Easy reorientation and angling
- Selection of small probe-tips
Principles of operation[edit | edit source]
The Renishaw uses electronics to immediately detect tiny deflections of the probe (upon contact with a solid surface). It passes this detection to the CMM and records a hit. This eliminates the need for the operator to manually press the record/measure button.
Tutorial[edit | edit source]
The Renishaw tip is stored in the IEW office (GJ 113) locked tool-chest. Contact an IEW member and/or shop supervisor for access.
Insert Renishaw head-shank into Z-axis and lock in place firmly against the bottom of the Z-axis rail and attach Din cables.
Note: The machine should have been homed in the X, Y, and Z axes prior to performing this step. CAUTION: Failure to lock shank and adjust counterbalance can result in falling head and equipment damage
Select and attach probe:
Select and attach (screw in) the desired detector and probe tip.
Press the auto-probe button on the controls
Note: The probe auto detect can be deactivated when navigating tight spaces to avoid accidental detection.
Loosen knob to choose direction and angle then re-tighten.
Calibrate and use normally according to CMM use instructions
Note: The probe requires re-calibration after any direction/angle change, but part alignments should stay constant.
When not needed: unplug and store Renishaw head in storage box.
Once complete: Return box to the IEW toolbox.
Note: The Renishaw head is heavy compared to standard probes; its removal may cause the counterbalance to lift the Z-axis.
Renishaw tips/reminders[edit | edit source]
- Tip can rotate and change angle
- Needs to be recalibrated each time
- Don’t hold the head while moving
- Deactivate auto-detect if moving quickly moving into a tight space
- Basic head better for determining center of small holes
- Always verify direction of measurement (inside/outside radius)
- SLOWLY approach surfaces