[andrewklay]

Recently I was called to a customer about an "IPM"(449) alarm on axis Z. When I got there I could not get the alarm to regenerate, but now I was receiving a new alarm when trying to home the machine. Reference return incomplete and battery low alarm on axsis Z.

Now what they tell me is the machine was shutdown for a about a week and when they turned it back on for use they got this IPM alarm. So automatically I checked all the batteries in the system and they all checked out okay. So i decided to remove the drive and check the IGBT even though i wasnt getting the IPM alarm anymore. The drive tested ok and after reinstalling im still not getting the IPM alarm. I decided to try and switch the Z encoder cable to the x and y axis drive and the alarms seem to have followed the cable. So i have removed the encoder from the z axis motor and have tested it AND THE ENCODER SEEMS TO BE OK TOO!! what else could it possibly be?!?! I have very little experience with cnc, I am a robotics tech trying to venture into new territory. Any help would be greatly appreciated.

Thanks guys.
Andrew

P.S. The encoders are absolute (A860-0360-V501)

[botha.y]

Does your machine slow down when it hits the dog during reference return?

[andrewklay]

Yes it does. But it never goes to zero on the machine.

[miraclecure]

what is the numbers of your new Alarms?
if 300 306 or smth when it will be easy to get over

[andrewklay]

300 and 306 is what comes up. Needs to be zeroed and it's giving me battery low alarm

[ifixcnc]

What control is on the machine? Newer Makinos have a Fanuc base with a Makino overlay, like pro 3 or 5.

[andrewklay]

Honestly I'm not sure what version it is.the machine is about an hour away from me. All I know is all the controls in the cabinet are Fanuc. The machine is probably ten years old or more.

[Talking]

you shoud set the zero with 1815 parameter.
find in there bit APZ for Z axis and input 1 instead 0
but take care, when you do this the axis must be at the zero end of ball screw.

[ifixcnc]

If 1815 is on that control, you must do it exactly at zero.

[andrewklay]

Ok thanks. I'll try that out