Thread: "OPEN LOOP" on Maho with 432/10 controller, unable to get out of e-stop

Hi,

I'm still having serious trouble getting my Maho MH600E up and running.

I have loaded all constants from computer so there shouldn't be problems there.

What happens is that as soon as I press the start button it comes up "OPEN LOOP" in the "COMMAND" field on the screen. I remember reading somewhere, not sure where, that this was normal, but would go away if you pressed the on button first very quickly and the let it go. And then within 5 second press and hold it while pressing "clear".

What happens with me is that no matter what I do the "OPEN LOOP" message stay put, and nothing more happens. The output from the controller (output 7) that confirms it's ok to go turns on for some milliseconds, long enough for the relay (19K1) to turn on and off so I can hear it.

As long as this output don't want to stay on there is no way to get out of e-stop. And I guess it's correct that it's open loop as long as it's not out of e-stop. After all the drives don't have control over where the axes are. And it's the fact that I can’t get it out of e-stop that is the cause of the problem.

I have tried turning the ball screw on the x-axis, and the position value is updated on the screen correctly. So it's getting correct position feedback.

The question now is what inputs should be set and not for the controller to accept to go out of e-stop. I have gone through what I believe to be all the relevant inputs to verify that the correct value is present. But there are no details of this in any of the manuals I have access to.

My next step now is to start to swap cards with Kennet's machine until I get rid of the error. But I'm afraid of what happens if the fault doesn't go away even if I replace the whole 432 controller. But I don't hope it comes to that.

Is there anyone on this forum with access to schematics or more details on the 432 controller’s internals?

Anders

Long shot as Im no expert.

But just to see if I understand you right.

Do you have the hydraulics running or thats the problem? To get it to "hook up" and stay on?

Sorry if asking the most obvious question allredy solved.

IF this is the problem, the "on procedure" can be found in this forums if you look around a bit. It takes some practice.
Hydraulic --> Hydraulic + Clear (with a slight delay of the Clear button press in regard to the second Hydraulic press.)

Did that make sense at all? haha

And once again, if this was totaly wrong, Im sorry.

You got my mail if anything.

EDIT: Read your thread about your machine and realise Im probably way of...

Hi,

Took some time off from my E2 for mental health reasons.

Going to take one last shot to get it running while I arrange for a new controller. Have to respect the machine but dealing with the controller is like doing CPR on a dinosaur.

I went through the whole E Stop thing and while I have got past it, (still "no RF" though) I have come to accept that I'm at the mercy of 20 year old circuits and they gotta go.

As for the E stop sequence, while it was usually hit and miss with the [start, machine shut down, start/clear within 5 seconds] sequence, I am now at a point where I have to hit start/clear within a fraction of a second to get the relays to hold. Should also add I went over every connection on the relays on the L.H. door and checked them for tight.

May want to try the timing thing, any more than a one second delay on this thing and I'm just pushin buttons!

Luck to ya