A Axis Fault

[rrbmachining]

I am getting eroor 164 a axis overcurrent alarm. The table has no load on it and the air supply is there. Has anyone any thoughts on what to try ?

How can you tell if the air brake is coming off correctly ?, The air solenoid valve is working as you get a quick blast from the exhaust. A look in the rotary manual does not help much on how the brake works.

Any help would be much appreciated, I cant afford to get Haas out to look at this

HRT210 and VF2

[Matt@RFR]

Maybe try unhooking the air supply and handle jogging the 4th. If you don't get another alarm for low air pressure, it may prove or disprove the brake.

[WallyL7]

I would assume, for S&G's, you already unhooked everything, turning off the machine, and firing up normally, then re-hooked everything up from scratch...?

I would also have to assume you have the correct model 4th axis chosen?

Do you have any other machines you could put this on just to try?

Is this a rotary table that has been used a bunch on the same machine, machine is working fine other than this...etc...


I know that is a common alarm on a Haas...just trying to refresh my memory on how we used to deal with it...

[rrbmachining]

I have never used this rotary with this machine but I do no that the servo drive board is ok, I get a small ammount of movement before the alarm kills the servos. I do have the correct rotary selected for sure.

Unfortunately I dont have another machine to try it on

[WallyL7]

Are you jogging by hand and this is happening? Would it also alarm if you programmed an -A- move and executed it? What about jogging with the joglock on?

Did you try just shutting off the machine and restarting it and re-homing it? It should rotate around on -A- to find zero again, at least then you'd know if it rotates ok...

[rrbmachining]

The fault first came on while I was jogging the A, tried re homing after a power up and it alarms out during the a axis rotation after about half a degree of movement

[Maintexpert]

First thing you using a brushless motor or brush type?
if it is a brush type motor you will want to check the brushes and clean them and check your armature.

[rrbmachining]

its a brush servo and the brushes look good. Im told it may be a parameter for the overload set too low but not sure which one

[Maintexpert]

You can take the belt off and try and run then if it still alarms out it is ether the Motor or cable
What year is the machine? for software purposes.
A Axis Max current Parameter is # 108

[rrbmachining]

ita a 1995 vf2 with software 7-34

[Wizzard of H]

Control software 7.34 could be either brush or brushless control.
Need to know which.
Alarm 164 says something is wrong with drive or amplifier.
Brush alarm 164 could be just a jammed/can't turn rotary.
Brushless alarm 164 has got o be something wrong with the amplifier.

[rrbmachining]

Its a brush motor, anyway today I dropped the belt off and it runs fine. Cant turn the worm sprocket by hand at all so it looks mechanical, anyone know how to get these things apart ?. Have removed the brake disk so its not that, all looks clean and it was running with plenty of oil but looks like the worm drive has jammed