BALDOR recently demonstrated an Ethernet Powerlink servo drive at the Machine Building & Pneumotion 2006 exhibition in the UK.
This device offers a migration route to new levels of performance for motion automation builders currently using positioning drives compatible with the CANopen DSP 402 standard.
Many replicating machinery builders use the CANopen fieldbus standard because of its low cost per node, simple wiring and wide product support.
The DSP 402 profile for positioning drives is often used in combination with an OEM's custom control software and hardware.
The decision of the EPSG - the group controlling the Ethernet Powerlink real-time Ethernet standard - to work with the CANopen standards body and adopt the DSP 402 profile (and the DS-301/DS-302 application layers), gives CANopen users an interesting migration path.
It offers the potential to upgrade the network to a much more sophisticated and higher bandwidth standard (100Mb/s rather than 1Mb/s maximum), with minimal disruption to the way OEMs build systems and to the control software.
In addition to easing system migration to Ethernet, Baldor's MicroFlex e100 dual-standard servo drive's CANopen interface gives users the flexibility to upgrade a control system architecture in stages.
In an Ethernet Powerlink system, MicroFlex e100 drives integrate an Ethernet Powerlink to CANopen gateway.
The drive has CANopen DS-401 I/O management capability, so if there is no Ethernet-compatible equivalent available for an existing system function, or if CANopen-based components remain the most cost-effective choice, users are free to partition the system accordingly. For example, there can be an Ethernet Powerlink core and drives, with sub-networks of CANopen I/O modules connected to drives.
Further potential gains are possible via Baldor's inclusion of motion control features on the drive, above and beyond those supported by the standard DSP 402 modes (Homing, Profile Position, Profile Velocity, Profile Torque).
MicroFlex e100 supports a range of high-level motion types that can improve equipment performance, such as electronic gearing, clutch simulation and high speed inputs for registration control and anti-resonance digital filters.
To complement the MicroFlex e100, Baldor's Ethernet Powerlink motion controller provides manager support for Ethernet Powerlink and CANopen, offering an attractive control solution to CANopen and Powerlink users alike. Called NextMove e100, it is capable of managing interpolated motion on up to 16 Ethernet Powerlink axes and controlling many more in DSP 402 mode.