Controller promises across the board robot enhancement

Controller promises across the board robot enhancement

Keywords FANUC,Robots

Improvements in performance across the full range of FANUC robots is promised with the launch of the R-J3 controller which is common to all models. This third generation control has four times the CPU power of the previous model which is reflected in faster robot acceleration rates and improved motion control.

The open architecture of the R-J3 allows for an integrated PC and other optional features. Nevertheless,it is backward compatible with the R-J2 platform making it easier for current users to make the transition to the new controller.

A key element of the new controller is an "intelligent" teach pendant that features full graphical input with a touch screen in a Windows environment (see Plate 1).

This will generate dedicated screens for the various application tools such as ArcTool and SpotTool for welding, PaintTool for spraying and PalletTool for handling.

Fewer keystrokes will be required and reduced screen changes to create a program. Icons are used to open sub-routines such as weld parameters. Fully interactive diagnostics will be available via the intelligent teach pendant.

The integrated PC also extended functions to be used and enables existing third party software to be used. There is hard disk capability.

 Plate 1 New controller features touch screen teach pendant and faster processing

A standard PCMCIA interface that uses non-volatile Flash ROM memory card allows FANUC "Tool"application software to be quickly installed. In addition, data files and programs can be quickly backed up and restored.

The six axis servo amplifier is a single card with quick change connectors for all cables. A replacement amplifier can be fitted in less than five minutes.

There is dedicated programmable machine control (PMC) hardware that provides high speed 1/0 processes without impinging on robot motion. 1/0 signals from ancillary axes such as manipulators, conveyors, and work-holding equipment can be controlled without an additional external PLC.

To improve robot performance there are a number of new features in the software. For example,there is automatic compensation for gravity which is dependent on the position and extension of the arm.

Using torque measurement on axes, a more sensitive "collision guard" software has been developed. This can eliminate the need for mechanical protection devices such as "broken wrist"links.

Cycle times have been improved by a system of optimised acceleration at corners, which is dependent on angle of change of direction. Where low centrifugal forces are involved the software generates rapid acceleration rates. Alternatively where there are high centrifugal forces, the acceleration is decreased.

For applications such as spot welding where rapid movements over short distances are required this will significantly reduce "time between spots".

For more information contact Maurice Hanley, FANUC Robotics (UK) Limited, Seven Stars Industrial Estate, Wheler Road, Coventry CV3 4LB. Tel: 01203 639669; Fax: 01203 304333.