Storebro260 
Project state 2012-04-15 / RH

Machine magically resurrected after fiddling with circuitry handling spindle- and XZ- motors.
Traced the reason for halted spindle motor to loss of stator power supply.
Did some extensive circuitry analysis as mentioned in previous report.
Followup with layout drawings where suitable measument points were selected.
Searched for and found corresponding points on PCB-board, drawing page Bl3.
At this time the faultstate disappeared and my measuments were made with functioning ciruitry as indicated in this link: Main spindle Statorfield signals.
The measurements are located near or at the end of the signalprocessing chain and some of the sources are still unidentified. Signals out from Bl3  are fed to a rectifier bridge with two Thyristors each taking care of one of the halfperiods of the 50 Hz source.