Mori MVJR with MX2 control trouble

[schmidtmotorwor]

.

1st problem; after months of working without any problems then sitting unused for 2 weeks I was unable to DNC to the control. I was able to send programs from the CNC control to the computer.

Checked continuity to wires, to CP07 board, all good.

Disconnected and reconnected the cables to the boards in hopes that it was a bad connection, now things are much worse.

If I start it with the number switch set to 0 or 1 the monitor never turns on, servo won't turn on.
If I start it with the number switch set to 3 message WORK OFF LINE (or something like that)
If I start it with the number switch set to 4 Monitor lights up and servo can turn on but the following errors are returned:
174 Memory
OT 4
OT X
OT Y
OT Z
The lower half of the control seems to not have power.
Cannot do anything.

The parameters are there but I can't edit them.

Not sure what to do next, Yaskawa parts and service are so expensive it would be easy to spend more than the machine is worth.

I would like to try regenerating the parameters but the notes I have for that must be incomplete, they don't seem to do anything now.

These are the notes I have, I think there is something missing, it was years ago last time I did that.

#7 Generator Push

RES, NEXT & ORG

Then

PRM, OFS& NC DATA CLEAR

#4 Load Push

RES, NEXT & WRT

Then

SYSTEM TOTAL DATA MAKE

[underthetire]

Was the machine on when you plugged/unplugged?

[schmidtmotorwor]

"Was the machine on when you plugged/unplugged? "

No it was not on.

Any ideas?

I was wondering if disconnecting the wires may have removed power in a way that caused memory to be lost.

[schmidtmotorwor]

I had a CNC repair guy come in today. he checked the wiring to the boards very carefully, that was OK.
Then removed CP07 and checked the RS232 circuits and said they are working properly.
He then said that he "thinks the problem is in the software" and pointed to a large chip on MM09.
He seemed less sure about what to do about this and he mentioned that something would need to be loaded onto the chip. I wasn't clear if he said the chip would be difficult to get or difficult to get the information to load on it, English was his distant second language.

He said he would call me if he had another MM09 board, no call, so the next step is not is clear to me.

One other thing, he disconnected and reconnected the battery, and the MEM ERROR 174(KEEP) doesn't show up now.

If I understand correctly I might be able to find a memory chip like the one on the board and might have to load some software onto it. It looks like it might be plugged-in rather than soldered-in.

Other choice might be buy a MM09 off eBay $1,000-$1,800 but I don't know if they can just be swapped in or not without programming.

EMC2 seems more attractive everyday.
Milling About

[schmidtmotorwor]

Against all odds I fixed the board myself and got my MVJR working again.
I really wanted to have that experience of being able to say "I fixed a
circuit board".

I replaced a lot of chips several 75189 about two 75188, no
improvement. A few other that I forget now.
Then replaced two 75175 and it worked but gave some RS232 errors.
Looked over the damage I did to the board, found a broken trace,
soldered in a jumper wire and now it is working.

Only two odd things that I noticed, the beep that I used to get when I
pressed keyboard buttons is gone, I'm sure that was a parameter but I
can't remember which one now.
Also the jog buttons aren't working (no big deal i never use them
anyhow)

I think I am beginning to understand the deal with the MX2, it seems to
work only when it senses that it is about to be junked and that you have
given up all hope of fixing it but keep trying anyhow.

[DouglasR]

Against all odds I fixed the board myself and got my MVJR working again.
I really wanted to have that experience of being able to say "I fixed a
circuit board".

Only two odd things that I noticed, the beep that I used to get when I
pressed keyboard buttons is gone, I'm sure that was a parameter but I
can't remember which one now.
Also the jog buttons aren't working (no big deal i never use them
anyhow)

I think I am beginning to understand the deal with the MX2, it seems to
work only when it senses that it is about to be junked and that you have
given up all hope of fixing it but keep trying anyhow.

Haha!

Seems like the jog buttons may need to be reactivated, the control may not "see" them due to one of those chips handling things like manual input. Not a big problem tho..

Yasnac used to be a contender for the CNC market and would routinely try to beat out Fanuc - in fact, up until the late 80s, many CNC applications people and service techs would recommend a Yasnac over a Fanuc CNC on new applications. But in the end, they folded their hand and have very little to do in the CNC market anymore. They'd really like to just forget all about it. Like General Electric did. The i80 and J30 were the last Yasnac CNC's that I know of.

I'm glad you got this little beauty running again. I was wondering if it were a rodent problem. I've seen CNC's where the controls were trashed beyond repair because mice had gotten in the cabinets.

My experience is that when a chip goes, it goes all of a sudden, usually at start up.

[swany]

I have an mv55-50 the screen is blank when started up in the nc mode but comes up on the acgc side Been to yasnac no help any ideas?