Manual control, disadvantages

Shear forming is typically performed cold, but in case of high-strength materials and thick components, heating is applied to reduce the roller forces. In industry, manual heating is used widely sheet is heated by an oxyacetylene flame as it is formed. However, this improvised approach has its disadvantages sheet temperature cannot be controlled... 

External field-mediated assembly techniques offer flexible and robust control of micro components in fluidic systems. Simultaneous use of multiple fields helps eliminate the disadvantages of individual methods and enables more complex assemblies. Most external field assemblies do not require closed-loop control however, methods like magnetic robots and manipulation of individual components to target locations with external fields require manual or closed-loop control systems. 

Disadvantages / limitations Lower capacity than conventional active cells low to moderate discharge rates Rapid self-discharge afta- activation AgCl system is expensive Self-discharge Need to control Li reaction with H2O complex system and controls Manual activation is in-conv iient and xmdesir-able for field use low- tOTip -ature p fonnance is poor Activation device reduces oiergy density costly, but warranted, for special q>plications... 

---