AB 1756-HYD02 with velocity and force

I have a customer that is trying to control a high speed press with velocity control and switch to force control. The HYD card only has the position feedback. what is the best way to take care of the force control? The system has a large and small Bosch servo valve.

try this:

Thanks it does help. What is the best way to change velocities accuratlt at differnet point in the stroke?

Good Hydraulic Velocity Profile Control

Look at Bosch-Rexroth HACD controller cards. Probably a good match for your application.

http://www.boschrexroth.com/business_units/bri/en/products/p_specials/i_hacd/index.jsp

They support SSI position transducers. They are very good at velocity control, they do force control, they do closed loop pressure control.

They communicate with AB via DeviceNet.