Precision alignment of web production equipment as well as other large rotating equipment is a critical factor in their maintenance. Alignment--using optical or laser methodology depending on the specific requirements--extends the life of machinery and markedly improves product quality. Alignment often allows for increased machine speeds, as well as reduced waste and downtime.
The best datum for aligning web production equipment is a machine centerline reference. The design of the machine and its structural supports must be considered when determining the correct type of reference: an offset baseline or a cross-machine baseline. Creating a universal datum for an entire machine provides the flexibility needed for a complete alignment maintenance program. It also increases accuracy and repeatability as well as improving the speed of alignment inspections.
Equipment alignment addresses a wide variety of product problems such as poor web tracking, web breaks, baggy edges, decreased trim width, uneven caliper and static electricity, among many others.
Accurate alignment of equipment helps solve machine problems such as decreased running speed, bearing and coupling failures, abnormal vibration, roll cover damage, and improper nip impression.
Procedures & Definitions
- Optical Methodology
- Optical Tooling
- Offset Baseline
- Cross-Machine Baseline
- Establishing a Baseline
- Instrument Calibration
- Inspection for Perpendicularity
- Inspection for Level
- Inspection of Lineshafts and Drives
- Definitions
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