Metrology
HEIDENHAIN Announces EnDat 3 Encoder Interface
Faster and more robust, with black channel support for functional safety
Published: Wednesday, August 16, 2023 – 12:00
Metrology
Published: Wednesday, August 16, 2023 – 12:00
EnDat 3 has increased memory and storage capacity and offers the ability to password-protect information that is stored in the encoder. For example, this could be specific code or machine information to which the company or manager might not want to allow full access for operators.
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HEIDENHAIN has simplified functional safety aspects of the interface, and EnDat 3 now leverages the industry standard for functional safety: black channel. This makes implementation much easier for OEMs.
Milton Willis, machine tool product specialist at HEIDENHAIN, says, “We’ve listened to feedback from machine tool manufacturers and their end users, as well as OEMs, and have responded by making EnDat 3 faster, more robust, and more fully featured than any competitive product.”
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The new encoder interface has reduced cabling requirements compared to the previous version, going down to a two- or four-wire setup as opposed to the eight wires previously needed. This reduces cabling requirements and hence cost, which is a significant benefit in the machine tool and robotics sector. For robotics applications, the EnDat 3 also offers bus operation, which allows manufacturers to daisy-chain encoders together to reduce cabling and therefore reduce costs, as well as to simplify design and manufacturing.
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The new interface supports an increased number of temperature sensors to monitor temperatures anywhere, from a robotics arm to inside a cabinet. It has also added support for multidimensional encoders, which enables easier installation and simplifies the downstream calculation that’s involved with using multiple reader heads on a single cable.
The first commercial version of the interface, EnDat 2.1 was created in 1995. At that time, most encoders used analog or digital incremental interfaces. EnDat 2.1 used an RS-485 output signal, which is more robust and less susceptible to noise.
Like all the versions of EnDat, the new EnDat 3 is bidirectional, so it can support monitoring and diagnostics. This means it can be used for preventive maintenance, for example, alerting the CNC when a fault is detected.
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