G/B Spindle Synchronization Position Error Compensation - Mitsubishi Electric M800VW Series Programming Manual

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M800V/M80V Series PLC Programming Manual (2/2)

13 Spindle Control

13.12 Guide Bushing Spindle Synchronization

13.12.2.3 G/B Spindle Synchronization Position Error Compensation

When machining a square bar during G/B spindle synchronization mode, the bar's torsion may cause either of the reference

spindle or the G/B spindle the overload alarm (S03 Overload 1 0050) or the over regeneration alarm (S03 Over regeneration

0030, S04 Pw sply: Over regeneration 0073). These alarms can be avoided by turning ON the "G/B spindle synchronization:

position error compensation" (GBCMON) signal to compensate the position error caused by the bar's torsion.

Workpiece's torsion is different depending on the area. So turn ON the "G/B spindle synchronization: position error

compensation" (GBCMON) signal at every cycle to re-execute a G/B spindle synchronization position error compensation.

How to command

 During G/B spindle synchronization mode, turn ON the "G/B spindle synchronization: position error compensation" (GBC-

MON) signal when the Chuck close signal turns ON. When turning it ON, make sure that the rotation of the reference spin-

dle and the G/B spindle is in the steady state in order to find the position error compensation amount.

 Measure the position error of the reference spindle and the G/B spindle 16 times to start the compensation. The position

error compensation amount can be checked with R465. (Unit is pulse, 1pulse ≈ 0.088°)

 After the measurement is completed, turn ON the "G/B spindle synchronization: position error compensating" (GBPCM)

 Cancel the G/B spindle synchronization position error compensation by turning OFF the "G/B spindle synchronization: posi-

tion error compensation" (GBCMON) signal when the Chuck close signal turns OFF. The G/B spindle synchronization posi-

tion error compensation can be held by turning ON the "G/B spindle synchronization: keep position error compensation

amount signal" (GBCMKP) signal.

IB-1501668-B

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