BarrettHand™ / Overview

The BH8-series BarrettHand™ is a multi-fingered programmable grasper with the dexterity to secure target objects of different sizes, shapes, and orientations. Even with its low weight (980 grams) and super compact (25mm) base, it is totally self-contained. Communicating by industry-standard serial communications or high-speed CANbus (USB adapters included), integration with any arm is fast and simple. The BH8-series immediately multiplies the value of any arm requiring flexible automation.

The BarrettHand neatly houses its own communications electronics, servo-controllers, and all four brushless motors. Of its three multi-jointed fingers, two have an extra degree of freedom with 180 degrees of lateral mobility supporting a large variety
of grasp types. All joints have high-precision position encoders.

 

Why Buy a BarrettHand™ when Parallel-Jaw Grippers are so Cheap?

1) Each gripper must be custom designed. Grippers require specialists to design, fabricate, and debug specially-shaped finger surfaces for each part shape and for each unique part orientation.

2) Unless the host arm will perpetually perform the same task, it needs an infinitely variable supply of grippers and the ability to switch between them instantly as the part shapes and orientations change. A robot arm exchanges grippers with either a turret or a tool changer. A turret is limited to switching between 2 or 3 grippers. A tool changer can handle a large number of grippers, but at the enormous costs of wasted space from storage fixtures and badly increased cycle times.

Combined with its versatile software routines, a single BarrettHand matches the functionality of an endless set of custom grippers -- yet switches part/tool shapes
electronically within half a second.

The BarrettHand integrates with your application by consolidating many custom gripper tools into a single smart grasper. It is shipped as a complete turn-key system.


BarrettHand™ Software
Barrett Technology’s full-source code and examples are included with every purchase and provide comprehensive ways of controlling the BarrettHand.

The BHControl application works under both Linux and Windows and presents an
easy-to-use graphical user interface (GUI) for control of the BarrettHand. It exposes
all of the functionality provided by the BarrettHand C/C++ library and the powerful yet easy-to-learn Grasper Control Language (GCL) in a graphical environment, without writing any code.

The visual control window of the BHControl application enables control of the hand interactively. The user is capable moving the fingers of the BarrettHand™ to any desired position with a mouse.

The BarrettHand C/C++ library facilities configuring and controlling the hand. The library coordinates all communications with the hand and provides functions to control the hand. The functions take advantage of the firmware's RealTime mode and Supervisory commands. The library is written for Windows and Linux.

The BarrettHand's firmware resides on the control electronics inside the hand. The firmware interprets the commands sent from the host computer and responds accordingly. The firmware has two modes: Supervisory and RealTime. The Supervisory mode allows the user to issue high-level commands, which the BarrettHand™ will execute. When the hand is finished executing the command, it returns control back to the user. The RealTime mode enables continuous control and monitoring of motor parameters, allowing real-time motion control.



The BHControl User-Interface and firmware are included with every BarrettHand™ BH8-series purchase.

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