Renishaw Probe

Renishaw is a global company that specializes in, motion control, optical devices and precision machinery. Renishaw probes are commonly used on 3D measurement machines from various manufacturers around the world.
Renishaw Probe
Manufactured by Renishaw a company based in the UK
Key advantages of using Renishaw probes:
- High accuracy
- Durability and long lifespan
- A wide range of products that meet the needs of most 3D measurement machines on the market
- Fast delivery times
- Quick repair and warranty services
Specifications of the Probe

- A : Diameter of the probe tip
- B : Measuring from the rear mounting face of the stylus to the centre of the ball.
- C : Stylus stems with ball/tip diameters of 2 mm or greater and with lengths up to 30 mm
- D : measured from the centre of the ball to the point at which the stem will foul against the feature when measuring ‘normal’ to
the part.
Notes
- Choosing a styli short : The more that a stylus bends or deflects, the lower the accuracy. Probing with the minimum stylus length for your application is the best option.
- Minimise joints
- Keep the ball as large as possible :
– Firstly, it maximises your ball/stem clearance thereby reducing the chances for false triggers caused by ‘shanking out’ on the
stylus stem
– Secondly, the larger ball reduces the effect of the surface finish of the component being inspected.
Technical Specifications of Renishaw Probe

The success of measurement largely depends on the probe’s capabilities, with the ability to maintain repeatability at a single point with accuracy up to 0.08 μm. The probe is manufactured by Renishaw to the highest standards and is coupled with the probe body, ensuring maximum integrity of the joints during measurement.
TP 20 Probe

The TP20 is a touch-trigger probe that gives its users the ability to change stylus confi gurations manually or automatically, without re-qualifi cation. The TP20 probe comprises two parts – a probe body and a detachable stylus module which contains the kinematic touch sensor and carries the stylus assembly.

Probe extension modules increase probe reach, allowing the inspection of features with restricted access. The extensions available are 70 mm (EM1) or 95 mm (EM2). The standard trigger force module is integral to both EM1 and EM2.
TP 20 Probe

The TP200 combines micro-deformation probes with excellent repeatability and precise 3D measurement, even with long styli, capable of performing millions of measurement points.
Stylus types of rensishaw
Straigt Styli
Stainless steel body

- Ball diameter A: 1 to 8 mm
- Length B: 10 ,11, 20 mm
- Stem diameter C: 0.7 to 2.5 mm
- Effective Working Length D: 4.5 to 20 mm
- Thread size: M2
Stylus stems manufactured from stainless steel are used widely for styli with ball/tip diameters of 2 mm or greater and with lengths up to 30 mm. Within this range, one-piece steel stems offer the optimum stiffness to weight ratio, giving adequate ball stem clearance without compromising stiffness with a joint between the stem and threaded body.

Tungsten Carbide body and Carbon body
- Ball diameter A : 0.3 to 5 mm
- Length B: 10 to 50 mm
- Stem diameter C: 0.2 to 2.5 mm
- Effective Working
- Length (EWL) D: 2 to 50 mm
- Thread size: M2
Tungsten carbide stems are best used for maximising stiffness with either small stem diameters required for ball diameters of 1 mm and below, or lengths up to 50 mm. Beyond this, weight can become a problem and stiffness is lost due to deflection at the stem to body joint.
Ceramic body

- Ball diameter A: 3 to 6 mm
- Length B: 30 mm
- Stem diameter C: 2, 2.5 mm
- Effective Working Length (EWL) D: 27, 30 mm
- Thread size: M2
For ball diameters greater than 3 mm, and lengths over 30 mm, ceramic stems offer stiffness comparable to steel but are significantly lighter than tungsten carbide. Ceramic stemmed styli can also offer additional crash protection to your probe as the stem will shatter in a collision.
Carbon fibre body

- Ball diameter A: 4, 5, 6 mm
- Length B: 30, 50, 75, 100 mm
- Stem diameter C: 2, 3 mm
- Effective Working Length (EWL) D: 30, 50, 75, 100 mm
- Thread size M2
There are many grades of carbon fibre materials. However, Renishaw GF combines optimum stiffness characteristics, both longitudinally and in torsion (important in star constructions), with extremely low weight. Carbon fibre is inert and this, combined with a special resin matrix, provides excellent protection in the most hostile of machine tool environments.
Renishaw GF is ideal for maximising stiffness while giving very low mass for styli above 50 mm in length. It is the optimum stem material for high accuracy strain gauge technology probes with excellent vibration damping characteristics and negligible co-efficient of thermal expansion.
Star Styli

- Horizontal Extension : 10 đến 30 mm
- Ball diameter A: 0.5, 1, 2 mm
- Stem diameter C: 0.3, 0.7, 1.4 mm
- Effective Working Length (EWL) D: 12 mm
- Thread size: M2
These stylus clusters provide you with multiple-tip probing of complex features and bores. Four or five ruby ball systems are mounted rigidly on a stainless steel centre.
Their use can reduce inspection cycle times by allowing multi-tip probing, minimising the need to move the probe to extreme points of internal features such as the sides or grooves in a bore.
Using star styli also allows effective probing in the –Z (upwards) direction when using a 5-way probe, provided that the stylus tips extend beyond the diameter of the probe body. Each tip on a star stylus requires datuming (sometimes referred to as ‘qualifying’ or ‘calibrating’) in the same manner as a single-ball stylus. The ‘span’ of star styli is taken from ball centre to ball centre.
Disc styli

- Measuring Disk Diameter: 6 to 25 mm
- Measuring Tip Thickness: 1.2 to 3 mm
- Roller Depth: 2, 2.5, 3 mm
- Body Diameter: 1 to 4.2 mm
- Thread Size: M2
These styli are used to probe undercuts and grooves within bores which may be inaccessible to star styli. They are ‘sections’ of highly spherical balls and are available in various diameters and thicknesses
Full rotational adjustment and the ability to add a centre stylus are features of the Renishaw range of disc styli that make them particularly flexible and easy to use.
Cylinder styli

- Cylinder Diameter: 1.5 to 4 mm
- Total Length (B): 10.75 to 22 mm
- Body Diameter (C): 1 to 2 mm
- Effective Working Length (EWL): 1.25 to 10 mm
- Thread Size: M2
These are used for probing holes in thin sheet material. In addition, various threaded features can be probed and the centres of tapped holes located. Ball-ended cylinder styli allow full datuming and probing in X, Y and Z directions, thus allowing surface inspection to be performed
Other Accessories
Stylus extensions

- Extension Body Length: 5 to 90 mm
- Ball Diameter: 3 mm
These extension bodies allow the probe to operate at greater lengths. However, using extension bodies may reduce the accuracy of the probe due to the loss of rigidity. Since this is not an electronic probe with a very small trigger force, it is less sensitive to this type of inaccuracy.