[electror]

Hi all,

I hope someone can guide me? I have a Haas drive that is giving me some problems that don't add up.
as soon as we want to run the spindle drive the motor will start to accelerate (few seconds)but trip out with errors
102 servo off
160 low voltage
123 spindle drive fault

however we have noticed that when the drive starts to accelerate the dc bus does start to rise out of its normal spec.

the drive has been electronically tested with no errors.
input voltage is in perfect range
regen resistor is perfect

has any experienced this error and what are we missing?

[Donkey Hotey]

Are you getting power straight from the city or are you on a phase converter?

What is the incoming power measuring and which set of taps are you connected to? Is it close (bottom of the range)?

[electror]

Are you getting power straight from the city or are you on a phase converter?

What is the incoming power measuring and which set of taps are you connected to? Is it close (bottom of the range)?

yes all those basics have been checked and are perfect. we even moved the taps one up to see if it made a difference and it didn't, power comes straight from the city.

[Donkey Hotey]

What year is the machine?

When you start the spindle, are you watching the DC bus voltage on the Diagnostics screen? Does it go down on that screen or are you measuring it with a voltmeter as it drops? Whatever it shows on the diagnostics screen is what the control is going to respond to. If that dips below--I think--300V, it triggers the low voltage alarm.

It gets that signal from the Vector Drive and--depending on the year--it goes to a connector on the MoCon board. If you have a later machine with a MainCon, I'm not as familiar but, the basics will be the same.

[machinehop5]

...I was reading just the other day about this Low Voltage Alarm bug on Haas machines...if, you read reply #14 in this thread below someone has a work around.
https://www.cnczone.com/forums/haas-...-problems.html
this may or may not help ya...
Good luck,
DJ