Some question before buying

I am a control engineer from AtlasCopco China.We are developing an arm without motor but with encoder for error profing in electronics industry.
But after I found your product,I change my mind.Why do not develope a arm like your product.
I am very intrested in your product.But I have some question about your product.
1.What is the max load of arm? (I want to install Atlascopco micro torque tool on your arm)
2.Is there any communication protocol in your arm.(I want to use PLC or PC send some command to your arm through TCP socket or serial port.)
3.Is this arm stable?