| Condition of failure | | Cause (in processing) | remedy |
|
|---|
| Feedstock distributed on separating sieve cover is not uniform. | | Flow capacity is too small. | Adjust flow adjustable valve at outlet of hopper to have the layer of stock on sieve cover kept 2-3 kernel thick. | | Inclination of sieve is small. | Increase inclination of sieve cover by angle adjustable handle. |
|
| Top layer of stock slide or irregularly move. | | Flow is too big. | Adjust flow by flow adjustable knob. |
|
| The stream of stock on twentieth layer sieve is not smooth. | | There is rice bran or dust on sieve cover. | Clean dust and rice bran with brush. | | Spring pressure on separating plate is undue. | Adjust the length of spring; adjust valve plate. | | There is dust or impurities in compartment. | Clean it. | | Sieve cover is uneven. | Repair with tools like wooden hammer and so on. |
|
| Stream of stock waves. | | Concave-convex shutter sieve wears seriously | Change sieve. | | The height of concave or convex is too small. | Change sieve. |
|
| Grain of top layer jump sieve cover. | | Rev is too fast. | Check and adjust rev to 295~305 rpm |
|
| Small grain of top layer jump sieve cover. | | Machine vibrates due to knife-edge and edge supporter wear too much. | Change a new set of device.
Plug a packing piece on gap at wearing place between knife-edge and edge supporter. |
|
| Small grain of top layer jump sieve cover. | | Machine vibrates due to knife-edge and edge supporter wear too much. | Change a new set of device.
Plug a packing piece on gap at wearing place between knife-edge and edge supporter. |
|
| The layer of stock is not steady, bad separating effect. | | The stock in hopper in operation is not enough. | Fill hopper with stock. | | The surface of large quantities of brown rice is damaged. | Adjust the position of compartition plate to prevent brown rice from mixing in paddy zone. | | Some stock have cycled too many times. | Check husking yield.
Adjust the position of compartition plate between brown rice and mixture of husked rice and paddy. | | Moisture content of stock is too high. | Check moisture content of grain. | | Moisture content of stock is not uniform. | Check moisture content of grain. | | Husking yield is not proper. | Adjust husking yield up to 85-90. |
|
| Separating effect is still bad after adjust by flow and angle regulating. | | Too fast or too frequent adjustment. | Observe separating process for some time, then start to adjust. | | Other one. | Run machine, after flow is steady, start to check. |
|
