[guhl]

Hi
Periodically when I power on the machine I get AL-17 on A06B-6055-H108 spindle unit with A20B-1001-0120 main board.
Earlier I have been advised possible reasons:
(1) Meaning
In the main circuit, the voltage at the DC link is abnormally high.
A fuse of the AC reactor unit may have blown.
(2) Cause and troubleshooting
(a) An input fuse of the AC reactor unit has blown.
→ Replace the fuse.
(b) Regeneration circuit failure
→ Replace the unit.
But nothing of this doesn't attend.
May bad capacitors cause this alarm?

[wawan]

ALM 17

GUHL your spindle amplifier broken in board side.
RAM was fault.

[guhl]

ALM 17

GUHL your spindle amplifier broken in board side.
RAM was fault.

What do you mean "in board side"? Which RAM is mentioned? On spindle?

[jdeere4250]

There is a chip that stores the spindle parameters on this unit, called NVRAM chip that needs to be either reinitialized and or replaced and the parameters reloaded.

[guhl]

There is a chip that stores the spindle parameters on this unit, called NVRAM chip that needs to be either reinitialized and or replaced and the parameters reloaded.

Ok
Thanks. Should I read out the contents of the RAM before? Or just insert new IC, reinitialize it and write parameters?
The procedure of reinitializing is known to me.

[jdeere4250]

Yes, best way is to write down the contents of the F parameters first, then do the initialization next. Then reload the F parameters. Sometimes you might fint the NVRAM chip just needs to be reseated.

[guhl]

Thanks
I had parameters written on the cabinet's door and I've reloaded parameters already.
The time will show the result...

And thanks for Wawan