Rockwell Automation 1746-BLM Blow Molding Module Installation Instructions - Manual (Page 10)

10 Blow-molding Module
Publication 1746-IN014B-EN-P - January 2001
Control of Accumulator Head Machines
The module controls parison wall thickness on accumulator machines by following
a setpoint profile of wall thickness vs. accumulator ram position. In this
configuration, the module is capable of controlling up to three blow molding
heads. One analog I/O channel is used for accumulator ram velocity control while
the others are used for mandrel position control.
Optionally the module may simply monitor ram position. Mandrel position and
accumulator ram velocity are normally both specified as a function of accumulator
ram position. Since the module supports a mixture of time- and position-based
modes, you may also specify accumulator position as a function of time.
Proportional
Valve and
Cylinder
Position
Transducer
Valve
Amp
Proportional
Valve and
Cylinder
Position
Transducer
Valve
Amp
Proportional
Valve and
Cylinder
Position
Transducer
Valve
Amp
Proportional
Valve and
Cylinder
Position
Transducer
Valve
Amp
1746-BLM
Module
Analog
Outputs
Analog
Outputs
Analog
Inputs
Analog
Inputs
parison
accumulator accumulator
mandrel mandrel
ram ram