Engineering Guide CDA3000
1-7
1 Analysis of task
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Process analysis
A process analysis establishes what demands the processing process
places on the drive.
Questions to be answered:
1. What is the movement requirement for processing?
2. Moment of inertia of the processing machine, referred to the motor
shaft?
3. What manipulating range is required for the processing process?
4. What load torque needs to be overcome?
Answer the questions in this example:
1. Continuous material flow.
2. Is of no significance in applications with continuous material flow.
3. Speed manipulating range of 1:10.
4. No overload necessary, because the screw of the extruder would
otherwise be damaged. When the screw has become clogged, it is
drawn forward out of the extruder for cleaning.
The answers supplied in the process analysis deliver a solution with a
standard inverter without speed feedback. This means a substantial cost
reduction.
Figure 1.7 Solution from process analysis
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