1. Problem description & scope of application
This diagnostic manual addresses symptoms of slow or inconsistent operation of pneumatic cylinders that are common in industrial automation systems. The methods contained herein are applicable to double and single acting cylinders in a variety of applications from material handling to assembly automation, particularly in the DACH manufacturing sector. Unreliable cylinder operation can result in significant production losses, quality defects and increased maintenance costs. The problem classification is as follows:
- Critical: Complete cylinder standstill, blockages, uncontrolled movements, direct danger to personnel or machine.
- Severe: Significantly extended cycle times (>15% of nominal time), inconsistent end position positioning, audible hissing (leakage), increased compressed air consumption.
- Slightly: Slightly increased cycle times (<15%), slight irregularities in movement that do not directly affect production.
Compliance with standards such as DIN EN ISO 4414 (Pneumatic fluid technology - general rules and requirements for systems and their components) and VDI 2240 (maintenance strategies) is essential for the safe and efficient diagnosis and elimination of faults.
2. Safety instructions
Working on pneumatic systems involves specific risks. Strict adherence to the following safety precautions is imperative to avoid injury and property damage. All work must be carried out in accordance with the requirements of the Industrial Safety Ordinance (BetrSichV) and the requirements of the DGUV.
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