[Nick.]

Wep!!! i have this Alarm since i buy this Machine...When i press stop or M5 this NICE machine shut down whit this Alarm 109 SPINDLE DRIVE UNIT..NICE!!!!!! I called thechnicien ..after 3 hours he toll me the try new power supply 550v(transfo)..but still not working!!!...now the spindel wont start!!i change the tap...480 to 440 now she start again but still don`t want stop..i dont now..!!.i dont now.!!...all voltage is in the range.. R.S.T terminal.????..i have all books for this Machine....
thank....for your Help!!!

english is my second language....

[OkumaWiz]

I've seen this before on machines and the main reason was inadequate power supplied to the machine. The voltage checked OK and the machine powered up fine, but the spindle start/stop would cause an alarm. It turned out that the cable to the machine was undersized and too long which caused a large voltage drop when the machine demanded large current draws.

However if the cable and supply are strong, you maybe have a drive unit issue. Check your drive unit for specific alarm codes and look in your drive unit manuals for the suggested fix based on the code.:idea:

[underthetire]

What spindle drive/control is it. VAC-A or DC, or Fanuc?

[Nick.]

I've seen this before on machines and the main reason was inadequate power supplied to the machine. The voltage checked OK and the machine powered up fine, but the spindle start/stop would cause an alarm. It turned out that the cable to the machine was undersized and too long which caused a large voltage drop when the machine demanded large current draws.

However if the cable and supply are strong, you maybe have a drive unit issue. Check your drive unit for specific alarm codes and look in your drive unit manuals for the suggested fix based on the code.:idea:

Thank you!!i will check my cable, is in alluminium , it`s maby the problem?
thank again!!!!

[Nick.]

What spindle drive/control is it. VAC-A or DC, or Fanuc?

the control is VAC-A...Her!!!

[underthetire]

Then yes, it could be an impedance problem. Too much resistance through the power cable/transformer will not let the drive regenerate through the line. Okuma's were sensitive to this up to the new "book" style drive units. All the VAC type drives did this.