New cobot with easy handling features

26 May 2020

A new collaborative robot from Mitsubishi Electric has been developed to work alongside human operators without the need for guards or safety fences, while meeting new requirements for adequate distancing of workers in manufacturing sites.

The MELFA ASSISTA cobot meets the needs of both standard industrial and environmentally sensitive applications – for example, it can be supplied with certified NSF H1 grease (National Sanitation Foundation guidelines) for applications such as the food and beverage sector. 

It can perform complex and delicate assembly tasks, precise work holding or repetitive pick and place operations with high levels of consistency and reliability. Application examples include working alongside human operators in automotive assembly tasks or performing packaging operations on production lines. 

Set-up of the cobot is via direct teach functionality where the user holds the arm and moves it to each required position; the position is then saved by pressing a button on the keypad built into the cobot arm. This complements the visual programming software used for more complex operations ¬– the RT Visualbox package allows for both drag and drop motion functions and individual adjustments to each movement. This means that costs for additional robot programming can be saved, as operators can alter set ups without specialised robot expertise. 

The MELFA ASSISTA cobot has repeat accuracy of ±0.03mm by a rated payload of 5kg and reach radius of 910mm. It enables increased product quality, which correspondingly reduces the time overhead required for quality control. 

Another benefit of the cobot is its ability to switch between collaborative mode – where it operates at the slower speeds typical of a cobot – and a higher speed mode for use in a more industrial ‘cooperative production’ environment. This ensures maximum application flexibility, and delivers the best possible return on investment. 

The new cobot meets all relevant safety requirements as defined under ISO 10218-1 and ISO / TS 15066. Fault diagnostics and operational state are also shown by a 6 colour LED ring mounted around the robot’s forearm which is always visible.

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