The coordinate measuring machine (CMM) stylus is a component of the measuring probe system of a coordinate measuring machine. It is mainly used to touch the surface of the workpiece, shift through the mechanical device of the measuring probe, generate signals to trigger, and collect measurement data. Ruby stylus are widely used in the market.
For contact detection, selecting the correct coordinate measuring needle can ensure the accuracy and efficiency of the measurement.
For stylus, when selecting a CMM stylus, it is advisable to choose a stylus with a large measuring ball as much as possible.
The measurement of the ball can increase the distance from the large diameter of the ball to the surface of the measuring rod, thereby reducing the probability of accidental triggering caused by collision with the stylus.
Due to the fact that the surface smoothness of the workpiece being measured directly affects the accuracy of the three coordinate measurement results, the larger the diameter of the stylus and ball, the lower the requirement for measuring the surface smoothness of the workpiece.
General knowledge of Zeiss needle accessories
I. Thread specifications
As is well known, accessories such as Zeiss stylus or extension rods are tightened through threads. Therefore, when using optional attachments, the first step is to understand the thread specifications supported by the current device.
How to check the thread specifications of attachments? Below is a schematic diagram of the thread of the reference stylus
The thread specifications are related to the type of sensor selected for the equipment. Taking Zeiss equipment as an example
1. Equipped with VASTXTGOLD or VASTGOLD probes (active probes)
The selection of attachment threads is flexible, with a default thread specification of M5 (for stylus, M2 or M3 specifications can also be selected according to the actual situation, just purchase M2-M5 and M3-M5 adapters separately)
2. Equipped with VASTXXT or VASTXDT probes (passive probes)
Default thread specification used: M3 (M2 specification can also be selected according to actual situation, just purchase M2-M3 adapter separately)
3. Equipped with RENISHAW probes (TP20/TP200, etc.)
Default thread specification used: M2
II. Materials
Different spare parts use different materials. Different materials directly correspond to the weight, stiffness, durability, and price of attachments. Overall,
1. Equipped with VASTXTGOLD or VASTGOLD accessory probes (active probes)
Steel, aluminum alloy, titanium alloy can be selected from various materials, including steel, aluminum alloy, titanium alloy, THERMFOIT, ceramic (rod), etc
Ruby, silicon nitride, diamonds and ceramics (large diameter styli, above 15mm), steel (customized measuring needles or large diameter styli), etc.