Dobot CR5A

CR5A is the middle of Dobot's collaborative range and the model most integrators start from: 5 kg of payload within a 900 mm radius, 25 kg of arm, 150 W of draw and +/-0.02 mm repeatability. The number worth pausing on is the reach. The CR7A, which lifts 40% more, reaches only 800 mm - so within the same family the weaker arm covers the larger workspace. Anyone sizing a cell from model numbers alone will get this backwards. Common to the CRA series: six rotary axes, a stand-alone safety controller rated PLd Cat.3 with more than twenty safety functions, certification to ISO 13849-1, ISO 10218-1 and ISO/TS 15066, laser calibration giving absolute positioning accuracy under 0.4 mm, an electromagnetic brake that engages within 18 ms and holds position within 1 mm on power loss, 24 digital inputs and outputs with both PNP and NPN switching, and Modbus TCP/RTU, EtherNet/IP and PROFINET as standard. The arm runs DobotStudio Pro; a 10.1-inch teach pendant, the SafeSkin proximity layer (15 cm pre-collision sensing, 0.01 s monitoring, 0.1 s response) and the VX500 five-megapixel smart camera are optional. Dobot rates the joints of this generation at up to 223 deg/s and claims a 25% shorter cycle time than the previous CR series. Two inconsistencies in Dobot's own published data are worth recording rather than hiding. The series comparison table gives this family maximum linear speeds of 3 to 5.5 m/s, while the CR20A product page puts maximum TCP speed at 2,000 mm/s - a gap of nearly threefold that the manufacturer does not explain. And in the same comparison table the ingress-protection row for the two largest models displays a repeatability figure instead of an IP rating; the CR20A product page states IP54 for both arm and control box, which is what this catalogue publishes.

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