Our T32 lathe is getting a 128 Emergency Stop alarm. Which, by looking
at the manual, says the e-stop is active. Push/Pull the e-stop a few
times, nothing. The alarm is associated with a blinking spindle stop
button and lit NC Alarm LED on the operator panel. Any thoughts? I know
this is pretty vague, but it's all I have to go on right now.
I once spent 2 days finding out that low lube would do that. :)
Our maintained man was on vacation, and nobody else thought to do the job
that was always done for us. Needless to say, I'm not a machine tech. :)
The E Stop signal chain is usually a series set of connections that go
through the servo drives, spindle drives, extreme OT LS 's etc. You will
probably have to check your wiring diag's. and jumper across each one of
these series connections to isolate the problem. But sounds like it might
be generated through your spindle drive.
Jumper??? Ack!!! That's a real bad idea.
There's a REASON the machine is in an E-stop state. And that reason may be
that it's real, REAL
unsafe to be in any other state. Putting a jumper across the open contact could
let the control
deliver power to something big and nasty, and could cause more problems than I
even want to think
about. (Big geysers of high-pressure hydraulic oil, fires, the sudden slamming
air-driven stuff, $5,000 servo drives melting in front of your eyes, runaway
servo motors wrecking
bearings, screws, and/or people, and more, are just the first things that come
to mind BEFORE I give
the question a lot of thought.)
A MUCH better approach is to look through the diagnostics and the ladder
diagram, and to find
out which part of the E-stop series circuit is open. That way, you'll know what
you're dealing with
BEFORE you actually try to deal with it. If ladder logic and diagnostics are
unfamiliar to you,
then you'll just need to accept the fact that jumper wires and "tricking" the
machine are out of
your range, too; and you'll have to get help from someone who knows how to deal
with the problem
well and safely.
That said, it's true that E-stop situations often happen for small and silly
reasons - like just
a loose wire on a limit switch, or even on the E-Stop button itself. But until
you know, you
really, REALLY don't want to too bold or careless about how you handle the
Get out your trusty meter and check the switch. May have a contact loose
or the switch may be bad, especially if they use it a lot. Check the one by
the tool changer door also, and on the pendant, if equipped.
Check the alarm history page also for possible further clues.
That alarm is specific to an E-Stop switch. If it were spindle drive, or
other drive, you would have a different alarm.
You can't 'idiot proof' anything....every time you try, they just make
Waylube is good!
I found out there was also a loud POP with the alarm. After further
investigation, there is a fried component on the spindle drive board? I
think. In the upper right corner of the board, there is a column of 12
diodes with green componentes between each. Each green component has 6
inline leads (resistor packs?). Third from the top looks like it
exploded. Doesn't look like the easy fix I was hoping for.
Someone is supposed to come out Monday to check it out. It's gotten
beyond my comfort zone.
On a different subject, Anthony...
You posted once about a parameter that I could use to set the counter
on a Mazak? The parts counter on the position page, I think. Do you
remember? I figured you could grep your posts far better than I.
Or, you can just scroll to the counter on the Position page and input a
number. The first
(left-hand) number is the current count. The second (right hand) number is the
stop target. When
the current count equals the stop count, the machine (assuming it's in
continuous run mode) comes to
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