Dong-Yih Machinery Co., Ltd.

Food Machinery Knowledge

Wrapper Tearing: What to Do When the Outer Dough Breaks

When encrusted products tear, start by looking at the ingredients: dough too firm or too soft, insufficient resting, a dried-out surface, or a filling that is too hard, too coarse, or watery. If the ingredients are consistent and tearing continues, stop the machine, cut the power, and check contact surfaces for residue and settings, calling for service if needed.

Filling Leakage and Exposed Filling

Filling leakage and exposed filling are commonly caused by a filling that is too runny or too generous, an improper wrapper-to-filling ratio, oil or water on the seal, or cutting-and-closing timing and speed that don't match. Adjust ingredients and ratio first, then stop the machine, cut power, and check the cutting point for residue; call for service if problems persist.

Inconsistent Piece Weight

When one piece is heavy and the next is light, common causes are changes in ingredient firmness and temperature, a hopper level that goes up and down, ongoing fermentation, residue buildup, or uneven feeding. Calibrate by sampling with a scale and changing one thing at a time; call for service if the problem persists.

Dough Sticking to the Machine and Conveyor Belt

Sticking is usually caused by ingredients that are too soft, too wet, or too warm, or by residue on contact surfaces or surfaces that weren't dried after cleaning. Dust only enough to stop sticking, since too much affects texture and sealing. Keep the belt and contact surfaces clean and dry, and call for service if they are damaged.

Products That Aren't Round, Are Lopsided, or Have Tails

Products that come out not round, leaning to one side, or with a tail at the seal are commonly caused by wrapper stickiness or elasticity being off, off-center filling, cutting-and-closing timing and speed that don't match, an out-of-sync conveyor pickup, or residue at the cutting point. Adjust ingredients and speed first, then stop the machine and cut power to inspect.

Filling Blockages and Uneven Feeding

Filling jams are usually caused by particles that are too large or uneven, tough stems or bone fragments, filling that is too dry or hard, or caked dry material. To clear a jam, always stop the machine, cut the power, and lock out and tag out first; never reach in by hand or with a tool while it is running.

Wrappers Too Thick, Too Thin, or Uneven

Overall wrapper thickness is adjusted through the wrapper-to-filling ratio and feed amount; a wrapper that is thick on one side and thin on the other is usually caused by off-center filling, uneven dough firmness, dried skin, or residue disrupting the feed. Adjust ingredients and settings first, and call for service if it is still off after stopping, cutting power, and cleaning.

Unclear Bun Pleats and Collapse After Steaming

Indistinct pleats are often caused by dough that is too soft, over-proofed, or too sticky on the surface; collapse after steaming is mostly due to over- or under-proofing, insufficient gluten strength, steam and heat control, or opening the lid too soon, and less often the machine itself. Check fermentation and dough first, then the machine.

Machine Noise, Vibration, and Overheating

Any unusual sound, vibration, or burning smell is the machine calling for help. If you hear metal grinding or banging, smell burning, see smoke, or the housing is too hot to touch, stop the machine and cut power immediately, don't restart it to test, record what happened, and call for service.

Electrical Problems: Tripping, Failure to Start, and Panel Error Codes

If the machine won't start, first check the outlet, main switch, emergency stop button, and whether the voltage matches; constant tripping may mean overload, leakage, or a wiring problem, so don't keep resetting and forcing it. Look up panel error codes in that model's manual, and call for service if you can't interpret them.

When to Fix It Yourself vs. When to Call Service

Ingredient adjustments, fine-tuning settings, and cleaning and reassembly according to the manual are things you can do yourself; disassembling internal mechanisms, electrical cabinets, or drive components, and any burning smell, smoke, abnormal noise, or repeated tripping, call for service. Before calling, have the model, symptoms, photos or videos, and what you've already tried ready.

Estimating Capacity: Working Back from Daily Output to the Machine You Need

The hourly output in a machine catalog is an ideal figure; what you actually get depends on running hours, changeover and cleaning, downtime, and defects. Work back from the number of pieces you need per day: calculate net production time first, then apply an operating-rate discount, to know what class of machine you need and how many hours to run it.

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