Answered Industrial gripper comparision

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Hi Vivan!

It is depending on application.

For most of the industrial application is gripper plus custom fingers, because the robot handle just one type of part for long time. It provides the highest reliability and rigidity at high speed.

The other type of grippers ( OnRobot, Robotiq ) are mostly used on collaborative robots with low payloads where the easy of use accross many different shapes is more important that the cycle time.

Hello Vivan!

As you can see on the websites of OnRobot and Robotiq, they provide their grippers for collaborative robots.

The pneumatic driven grippers are fast and apply high forces. They don't meet the requirements of  collaborative robots environement. 

Can you please tell us more about your application?

Thanks for your help!

My application is a robot cell with a 6 axis Fanuc.

I am new in this field but as I get more information about this field it seems that I have to use pneumatic gripper with custom fingers.

Hello Vivan!

You are right. I also suggest you to use a gripper with your own designed fingers. It's much more better on long term.

There are not just pneumatic but servo driven grippers too on the market but these are a little bit slower and "bigger". The advantages are force and stroke limitations. It's worth to take a look at them. 

Hi Jiang!

Thank you. 

Could you please give me some advise about how can I choose the gripper ? So what are the main points of view ?

I see there are parallel and angular grippers, what are the pros and contras of each? 

Hi!

The main parameter of a gripper is stroke, the applied force and the maximum length of the fingers. 

This three data is likeproject triangle ( money, cost, quality).

Pay attention to stroke becasue some manufacturer gives this data as stroke/jaw but others as overall stroke. 

Sometimes it is hard to specify the force you need so the big manufaturers give recommendations by the part weight to the grippers.

The maximum finger legth usually depends on the pressure of the pneumatic system. The manufacturer gives you a chart where you can get your data. My experince is the shorter finger results higher lifetime and rigidity.

I wish this helps you.

Hi Jiang!

Thanks a lot for your help.

Finally, based on your suggestions I have chosen a Schunk PGN-plus gripper and it works fine. It has very competitive parameters.

Thank you again.