This gripper fits small cobots such as the Dobot MG400 . The simple PNP-type PLC interface can connect directly to the MG400 I/O ports, and it can be mounted using a simple 3D-printed adaptor. Additionally, this version of the gripper supports Modbus RTU over RS-485.
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Our Code: SKU-010786
Supplier Link: [Pololu MPN:5406]
The compact RM-EGB Series grippers from RobustMotion operate by sliding a pair of fingers together or apart laterally to grip and release. These fingers, which are designed to serve as mounting points for customised (e.g. 3D-printed) extensions, are able to exert consistent force in both directions, allowing them to grab parts internally (by opening into a gap) or externally (by clamping down) with missed pickup and dropped part detection.
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Size comparison of the RobustMotion RM-EGB Series 16D (left) and 20D (right) Grippers. |
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These grippers are available in two different sizes and each size is available with or without an RS-485 interface (see comparison table below). They fit small collaborative robots (cobots) such as the Dobot MG400, and operate at 24 VDC, which can be supplied from the MG400. The simple PNP-type PLC interface can connect directly to the MG400 I/O ports. A simple 3D-printed adaptor (139k STEP) can be used to mount a gripper to the MG400 arm.
| RobustMotion RM-EGB gripper: |  #5403: 16D, simple PNP |
 #5404: 16D, PNP + RS-485 |
 #5405: 20D, simple PNP |
 #5406: 20D, PNP + RS-485 |
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| PNP-type PLC interface: | ||||
| RS-485 Modbus RTU interface: | – | – | ||
| Rated Voltage: | 24 V (±10%) | |||
| Rated Current: | 0.3 A | 0.4 A | ||
| Peak Current: | 0.6 A | 0.8 A | ||
| Max. gripping force: | 60 N (±15%) |
80 N (±15%) |
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| Stroke: | 6 mm | 10 mm | ||
| Repeat positioning accuracy: | ±0.02 mm | |||
| Max. opening/closing time: | 0.1 s | 0.18 s | ||
| Size: | 23.5 × 38 × 98 mm | 27.6 × 50 × 108 mm | ||
| Weight: | 220 g | 320 g | ||
| Protection Class: | IP40 | |||
| Price: | $275.00 | $439.00 | $315.00 | $479.00 |
This is the larger of the two available gripper sizes, with a max stroke of 10 mm (both fingers combined) and a maximum gripping force of 80 N. It supports Modbus RTU over RS-485 (in addition to the PNP-type PLC interface).
The gripper can cover its full 10 mm stroke length in under 0.18 s. In addition to the fully open and fully closed extremes, the simple PNP-type PLC interface offers two preset intermediate positions (at 4 mm and 8 mm) that are achievable with ±0.02 mm repeatability, and the grip strength can be controlled by selecting from four preset force levels up to 80 N. The RS-485 interface gives more precise control of the position (0% to 100%) and force (25% to 100%). See the RM-EGB user’s manual (2MB pdf) for more information.
RobustMotion RM-EGB Series 20D Gripper mounted to a Dobot MG400 Robot Arm with a 3D-printed adapter.
Dimensions (in mm) of the RobustMotion RM-EGB Series 20D Gripper.
Pinout of the RobustMotion RM-EGB Series Compact Finger Gripper. Note: pins 9 and 10 (DSW+/-) are only used on the RS-485 interface versions. |
Close-up of the RobustMotion RM-EGB Series 24VDC Compact Finger Gripper connector. |
The grippers have a 200 cm (80″) cable with ten conductors terminating in a 12-pin, 2mm-pitch A2008H-12P connector. RobustMotion recommends cutting the connector off and using the individual wires.
The RobustMotion RM-EGB Series 20D Gripper has a 200 cm cable.
| Size: | 27.6 × 50 × 108 mm (1.09″ × 1.97″ × 4.25″) |
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| Weight: | 320 g1 |
| Interface: | simple PNP + RS-485 |
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| Voltage: | 24 V |
| Lead length: | 200 cm |
| Version: | 20D |
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This adaptor is designed to work with the Dobot MG400 robot arm and the RobustMotion RM-EGB Series Grippers.
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This adaptor is designed to work with the Dobot MG400 robot arm and the RobustMotion RM-EGB Series Grippers.
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