Poor roundness

Shape Causes for anomalies Countermeasures
Oval Pre-work conditions of the workpiece

1. The allowance shall not be too much or too little.

2. Check the hardness of the workpiece.

3. Check whether or not the workpiece is deformed.

Interference from the fixtures

1. Check the supporting plate.

2. Check whether or not the backstop rod is installed properly.

Triangle

Insufficient center height

1. Increase the height of the supporting plate.

2. Check whether or not the supporting plate has sufficient rigidity.

3. Check whether or not the supporting plate is worn.

Pentagon Poor grindability

1. Use a coarser or softer grinding wheel according to actual circumstances.

2. Reduce the speed of workpiece.

3. Reduce the revolution speed of grinding wheel.

4. Check the balance of the grinding wheel. 

Bouncing of the workpiece

1. Check whether the supporting plate is placed too high or the allowance is too much.

2. Check the operation speed or vibration of regulating wheel and reduce infeed speed.

3. Check surface dyeing of workpiece.

Irregular shape Poor trimming

1. Check whether or not the feed amount of the diamond dresser is too much or

 transverse feeding speed is inconsistent.

Unstable operation of regulating wheel

1. Check whether or not the transmission belt is loose.

2. Check whether or not the chain is loose.

Burning and cracking of workpiece

1. Check for adequate cooling.

2. Check whether or not the air vents of the grinding wheel are blocked.

3. Reduce the feeding speed.

4. Choose a softer grinding wheel.