Fanuc Alarm:
NC alarm Path2: [SV0401] (AY) improper V-ready OFF

Fanuc CNC conrol Alarm Description:
Although the ready signal (PRDY) of the position control was on, the ready signal (VRDY) of the velocity control was OFF

The Fanuc Drive had an alarm of F. The alarm occured on power up in the morning and occured immediately when the main breaker was turned on. For this alarm the F is what gave it away though you would never know what was really happening by...

This problem happened on a brother drill tap center TC228. The spindle would not unclamp all the way to allow the tool to enter the taper area. The problem was cause by an operator that was machining and stopped the tap on the part. They then forgot to release the part and moved the Z axis up forcing the tool out of the spindle. This particular spindle has 3 balls that lock and pull the retention knob of the tool in the spindle. Shining a flash light revealed that the balls were sheared off and...

Auto operation cant cycle start alarm occurs anytime the cycle start pushbutton is activated on Hitachi VM40II.

Had this alarm come up after the customer dropped the palletchanger operation box. What I ended up finding was the feedhold button internally broke. The spring return for the button broke. Feed hold circuits are normally closed during normal operation. So in this condition it was like someone was pushing the feedhold button and holding it and at the same time trying tpo...

079 PS Alarm When calling a tool change and axes not at home.

This alarm occured after on a Fanuc control. Before a tool change call up. What had happened was the new programmer forgot to cancel active tool offset values. If I programmed the machine to go to home first it would tool change ok. I put a G49 right before the tool change and the program ran ok.

950 PMC SYSTEM alarm PC050 NMI SLC when trying to power off. AL15 on spindle drive.

This problem occured on a Mori Seiki with a fanuc 16 control. Then after power down the control would occasionally come up with a 7115 or AL15 on the spindle drive which points to the MC circuit or power on sequence. After some troubleshooting I also noticed the control came up by powering on the main breaker of the machine. I also noticed that by pressing control power off that the control did not want...