Hard-wired touch probes for turning and grinding machines for automatic inspection of workpiece contours for machining errors. Exact measurement of workpiece position using digital measurement, extreme reduction in measuring time using cyberspeed, analogue scanning process.

TC76-DIGILOG touch probe – One system, two technologies, thousands of measuring values

  • Highlights
  • Applications
  • Features
  • Accessories
Future-oriented DIGILOG technology
Scanning touch probe featuring DIGILOG technology
  • Detection of machining errors caused by analogue scan process in the machining centre
  • Comparative measurement between master part and workpiece
  • No production of NOK-parts due to downstream, external measurements
  • Immediate rework in the original setting is possible
  • Massive reduction of the measuring time when evaluating surfaces
shark360 DIGILOG measuring mechanism
shark360 measuring mechanism with face gearing
  • High-precision, face-geared measuring mechanism
  • Wear-free, optoelectronic signal generation
  • Defined deflection direction and constant deflection forces
  • Extremely fast measurements
  • Maximum measuring accuracy even with off-centre probing
  • High measuring resolution for maximum precision and safety
DIGILOG Software BCS 3.0
BLUM DIGILOG Technology evaluation screen
  • Evaluation and visualisation at the control screen or BLUM Touch Panel TP48-21
  • Early detection of “error trends”
  • Comparative measurement between master part and workpiece
  • Flexible definition of warning and tolerance limits per workpiece
  • Providing the tracked data in log files
BLUM workpiece touch probe

Touch probes by BLUM can be used for the most varied measurement and monitoring tasks in CNC machining centres.

Position Measurement

Fast determination of current workpiece position (workpiece zero point) prior to machining or after resetting using digital (switching) measurement.

Measurement of Standard Features

Digital (switching) measurement of distances, single points, angles, inside and outside diameters, inside and outside widths on a manufactured workpiece.


Analogue scan of workpiece contours in machine tools with a resolution of 1000 measuring values per second. Deviations from the target contour are detected in the machining clamping process.

Modular System

The modular design of the measuring system enables customer-specific adaptation for special measuring tasks. BLUM offers a comprehensive range of accessories such as extensions and elbows for this purpose.

Workpiece Inspection

Inspection of the manufactured workpieces for machining errors and adherence to manufacturing tolerance by means of control measurements prior to clamping.

Adaptive Machining

Determination of parameters for adaptive machining and process control between and after machining steps.

Coolant Load

Reliable and fast measurements in coolant thanks to modern measuring mechanism with enhanced measuring force.

Mass Production

Ideally suited to mass production under the harshest conditions.

Wear Compensation

Tool wear is compensated for by taking measurements on the workpiece and comparing these with the nominal dimension.

Temperature Compensation

Compensation of the temperature-dependant thermal behaviour of machining centres.

Touch Probe TC76-DIGILOG
Modular system with cable connection
Technical drawing of BLUM TC76-DIGILOG touch probe


  • Max. probing speed: 2 m/min
  • Repeatability: 0.4 µm 2σ
  • Protection class: IP68
  • Approach directions: ±X, ±Y, -Z

Additional information can be found in the relevant brochure and in the operating manual.

Extension options
TC76 accessories: Extenders and elbows

A full range of accessories is available for the TC76-DIGILOG touch probe, providing optimal solutions for customer-specific applications:

  • Various sockets
  • Pneumatically operated protection sleeves
  • Elbows
  • Extensions
  • Various styli
Touch Panel TP48-21
BLUM touch panel TP48-21 for evaluation and visualisation of measurement results

Modern touch panel for retrofitting. It is used if visualisation and operation is not possible on the machine control.


Analogue scan of a gear using a BLUM TC76 DIGILOG touch probe
Analogue scan of an elongated hole using a BLUM TC76-DIGILOG touch probe

Success Stories

Timo Lehmann, CEO of Karlheinz Lehmann GmbH
We are fortunate, that we have obtained such an efficient solution through the combination of the BLUM-touch probe and Citizen machine.
Timo Lehmann
General Manager at Karlheinz Lehmann GmbH in Oberwolfach, Germany