5 Tips to Preventative Maintenance
Your Conveyors can be one of the most critical pieces of equipment. You run the risk that they will stop working properly and cause delays which could lead to production slowing down or even stopping altogether. Every conveyor system should be inspected regularly and the results recorded. Routine maintenance is easy for conveyor systems that are complexly engineered. However, it can be done in seven simple steps. To ensure reliable and long-lasting conveyor life, conveyor and hoist rentals is the best hoists, & conveyers. Each of these items must be checked. Span Tech is available for technical assistance if you have any questions about the topics or problems not covered in this guide.
Preventive maintenance is an essential safety measure. Preventive maintenance can be performed regularly to prevent equipment damage and injuries to personnel.
- Prevent environmental contamination
Check the conveyor for any signs of environmental debris. Do not use the conveyor if there is contamination. Wear strips and the chain can be contaminated by abrasive or harsh materials. Small abrasive particles can get embedded in the plastic parts of conveyors over time. This can cause excessive friction between the wear strip and chain, which can eventually lead to reduced performance. Construction in an area near an exposed conveyor is a common source of abrasive pollution. Abrasive dust can be built up by drilling, grinding, sawing, and sanding as well as other processes such as drilling, grinding, sawing, sawing, sanding, and others.
These are just a few examples of abrasive material:
Medical Tablet Dust
Broken Glass Particles
These are some sources of contamination:
You can remove most abrasive contaminants by wiping the top and bottom of the wear strips with a damp cloth moistened in rubbing alcohol.
- Chain and Wear strip Inspection
The wear strip is an important feature of a Span Tech conveyor. The conveyor chain has legs on the outer links, which hook around the conveyor side frame. Scanlon wear strips are typically fitted over the sides of frames’ lips. The wear strip is connected to the conveyor chain, which results in smooth chain travel and reduced motor load. It also prevents any potential damage from direct metal contact. Wear strip problems are the most common cause of the derailment. Wear strip problems should be addressed at all stages of installation, maintenance, and repair.
Check the conveyor chain for broken links. Chain damage can be caused by dropping heavy items on the links or by a process jam. Any broken links should be replaced immediately. Material fatigue can also lead to the replacement of links immediately preceding and following broken links.
Check the chain-link Lock Tabs. Verify that all chain-link Lock Tabs have been properly installed. Use a flat screwdriver to reattach any tabs that are not broken. If broken, replace immediately.
For signs of wear, inspect the foot and leg tabs on the side links. The link should not be worn if it measures less than the dimensions in the right-hand columns.
To ensure that wear strips are correctly installed and in good condition, inspect them carefully. The wear strip sections should not be overlapped. The wear strip sections should be cut at an angle that is appropriate for the chain travel direction. Also, the gap between sections must be adjusted according to temperature. Wear strips should be inspected for signs of heat buildup.
- Drive/Idler and Side plates Inspection
The design of the idler is crucial. This weather-strips curve guides the chain around side plates and carries the weight as the chain moves around the sprockets.
For excessive wear or poor installation, inspect the drive/idler wear strips (“often called “horseshoes”) carefully. Make sure that the wear strips for the drive/idler are properly cut and pressed onto the Side Plates. The Side Plates’ ends must be kept in contact with the wear strips.
Check the Side Plates for any damage or excessive wear.
Check for missing or lose fasteners in the idler and drive units.
- Examine for foreign object interference
The primary reason for excessive wear to the chain surface is interference from foreign objects. Interference can cause broken links and rods in the chain, as well as damage to the conveyor driver or idler sprockets. If drag is too great, motor current can increase and Side Plates may fail. Interference can be prevented by clearing away all foreign objects near the conveyor and by moving any accessories or components that may come in contact with the chain.
The chain should be inspected for foreign objects that could interfere with its movement. Conveyors and machines adjacent to the chain must be kept out of direct contact.
Verify that there is no interference at the loading and unloading points.
To ensure components (transfer plates and transfer fingers, for example) are not damaged, inspect transfer devices. You should not touch the moving conveyor chain.
Make sure that any guide rails and brackets, raised sides, guide rail brackets and chain support rails are free from the conveyor chain.
Examine the entire conveyor for bolts and fasteners.
- Chain Slack and Sprocket Engagement
Chain slack can increase with time due to normal wear and the elongation chain links. Motor current can be caused by excessive chain slack. This can cause the chain to “jump teeth”, or slip on the sprockets. You can adjust chain slack by adding or removing rows of chains links.