Allowable Error Range For Circular Interpolation - Mitsubishi Electric Q172CPU Programming Manual

6 PARAMETERS FOR POSITIONING CONTROL

6.4.3 Allowable error range for circular interpolation

The locus of the arc calculated from the start point address and central point address
may not coincide with the set end point address for the central-specified control.
The allowable error range for circular interpolation sets the allowable range for the error
between the locus of the arc determined by calculation and the end point address.
If the error is within the allowable range, circular interpolation to the set end point
address is executed while also executing error compensation by means of spiral
interpolation.
If it exceeds the setting range, an error occurs at the start and positioning does not
start. Such an error are set the applicable axis or minor error code area.
Locus determined by spiral
interpolation
Start point address
Error
Central point address
Fig. 6.4 Spiral Interpolation
6 - 31
End point address
by calculation
Setting end point
address