6.11 Electrically Sequenced Hydraulic Cylinders

Describe the operation of this manually sequenced clamp and bend hydraulic circuit. Discuss any disadvantages of this system.

circuit-30

Describe the operation of this clamp and bend hydraulic circuit making use of a single directional control valve. Discuss any disadvantages of this system.

circuit-31

 

Describe the operation of this multi actuator hydraulic circuit making use of a sequence valve on the cap end of the bend cylinder. Assume the set value of the sequence valve is 400psi and the main pressure relief valve is set to 800psi.

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Describe the operation of this multi actuator hydraulic circuit making use of a sequence valve on the cap end of the bend cylinder and another sequence valve on the rod end of clamp cylinder.

circuit-33

 

Identify potential disadvantages of coordinating actuation sequence using solely pressure input.

 

Describe the operation of this electrically controlled clamp and bend hydraulic system.

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Describe what would occur if the clamp cylinder ever lagged significantly behind the bend cylinder during retraction.

 

Describe the operation of this electrically sequenced clamp and bend hydraulic system.

system-11

 

Discuss any advantages exhibited by the above purely electrically sequenced clamp and bend system compared to those making use of hydraulic sequence valves.

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