**Okuma Alarm-B** 2252 Mistake in arc command

In direct arc radius command, the coordinates of the arc center cannot be calculated from the L command and X and Z commands.

The command error between I and K commands and X and Z commands in circular interpolation exceeds the tolerance(std.:20 um).

**Object**

SYSTEM

**Code**

1->L value is smaller than 1/2 of the distance up to the target value.

2->Overflow in calculation of arc center or error

3->Error between the radius which is calculated from I and K commands and the distance between the end point and the center is greater than tolerance.

4->I and K commands are zero.

10->End point of the arc command after calculation of LAP, tool nose radius compensation, or tool offset is offset from the programmed arc more than the specified tolerance.

**Probable Faulty Locations**

1)I, K, and L commands and X, Z commands in the block containing the G02/G03 code.

Program Example:

Code 1 appears.

G00 X50 Z50 G02 X50 Z0 L20 F0.1 M02

Code 3 appears.

G00 X0 Z100 G02 X105 Z20 K-100 F0.1 M02

Code 3 appears.

G00 X0 Z50 G03 X95 I-1 K-20 F0.1 M02

**Measures to Take**

1)Change the command value so that an arc can be generated.

__Okuma Alarm-B 2252 Mistake in arc command__