Proper maintenance is key to extending the life of your screen printing equipment. Each piece requires a difference maintenance procedure. Fortunately, an electric screen printing conveyor tunnel dryer requires little, if any, daily maintenance. This makes it one of the least fickle screen printing machines in your shop. While a dryer may be low maintenance, a few small habits will go a long way in maintaining your dryer for the long run.
Keep your conveyor belt in good shape. In particular, keep your belt clean. A dirty belt can mark up your shirts as they go through the tunnel. Cleaning your belt is simple and does not involve disassembly. Get a wet sponge or rag and scrub the belt as it goes around your dryer, stopping it for a thorough cleaning where needed. In addition to a clean belt, keep sharp objects away from the belt to prevent tears. A hole can spread over time, forcing you to either replace the belt or get a patch repair kit.
Make sure your belt is tracking properly. Most new dryers have an automatic tracking system featuring a silicone bead on the belt edge and a corresponding groove cut into the rollers. If your dryer has this feature, make sure the belt guide is securely in the groove. If it pops out, the friction can cause the belt to prematurely wear out.
If your dryer is older or does not have an automatic tracking system, your conveyor belt should be centered and “tracking” in the middle of the rollers, not “walking” back and forth. Keeping the belt straight helps to extend its life. A belt that hangs over the roller will cause rapid fraying, forcing you to buy a replacement. Prior to tracking your belt, ensure your dryer is level. Pro tip: it is easier to track your belt when it is warm.
If your dryer has a direct current (DC) motor (high quality dryers do), you should replace the motor brushes every 1,000 hours of operation. Not performing this quick and inexpensive maintenance item can lead to an expensive problem down the line. If you do not replace the motor brushes, they will eventually wear down to nubs, and can cause an electrical short in the motor. A motor short could ruin the motor and/or forcing you to purchase replacement digital belt speed indicators. Suddenly, you might have to replace multiple, expensive parts because you avoided changing your motor brushes.
Your final dryer maintenance periodic checks should include the following items. First, check the wire connections. Wires can compress and loosen over time. Arcing (an electrical spark) can occur if a wire is loose. You do not need to be an electrical engineer to know that an internal spark is a bad thing for your dryer. Second, periodically clean your exhaust flue. As garments go through the tunnel dryer, the dyes in the shirts evaporate as gas and can condense back into a liquid inside your exhaust. Over time, the dye hardens and sticks inside the exhaust lines. This dye has the potential to catch fire, and is one of the most frequent causes of a dryer fire. Having a regular cleaning schedule helps to prevent any buildup. As for your exhaust, check the wind cap if you evacuate your exhaust to the outside. Over time, the wind cap can dislodge, causing a back draft and a fluctuation in your dryer temperature. Finally, check your temperature calibration. You want to ensure your shirts are coming out of your dryer fully cured.
Luckily, an electric screen printing conveyor dryer is one of the easiest screen printing machines to keep running. Following these basic conveyor dryer maintenance routines will keep your dryer running for a long time.
