Mazak Quick Slant 30N CAM T4 rescue or retrofit?

B.V. · Dec 30, 2022

Little update with some bad news:
I just turned on the control, checking all power supplies as suddenly the monitor started to spark and flash. I turned as quick as possible the control off but a burned smell was already there... Looks like this monitor died also (another problem on top) :nutter:

I continued without monitor to check all the voltages on the PSU:
+5.05V
+12.02V
-12.08V
+23.88V
I don't have my oscilloscope here right now so can't measure the ripple.

noname777 · Dec 30, 2022

you can replace it with LCD one. I saw few available on ebay. It should be coming with little PCB to interface it with Meldas NC monitor output.

cnctoolcat · Dec 31, 2022

Those values for your PS appear spot-on, so as '777 suggests, the PS seems to be OK. So time to dive deeper elsewhere...

The monitor is driven by one of the NC rack boards, the FX715 I believe. A bad board can fry a monitor (or two, ask me how I know, haha).

Good luck with it, keep us posted.

ToolCat

B.V. · Jan 1, 2023

Hi,

First of all, I wish all of you and your family a very happy and healthy 2023!!

cnctoolcat said:
The monitor is driven by one of the NC rack boards, the FX715 I believe. A bad board can fry a monitor (or two, ask me how I know, haha).

As I heard and saw flashes around the tube, I guess the HV system failed on the monitor...
How can a bad board fry the HV system of the monitor? The monitor works with EGA I thought?
The monitor did work before but the brightness was very low, already a sign of giving up.

As for the parity error, are there any other things I can check or replace? I didn't find any FX784 board set for a T4 on ebay yet...

noname777 · Jan 1, 2023

B.V. said:
Hi,

First of all, I wish all of you and your family a very happy and healthy 2023!!

As I heard and saw flashes around the tube, I guess the HV system failed on the monitor...
How can a bad board fry the HV system of the monitor? The monitor works with EGA I thought?
The monitor did work before but the brightness was very low, already a sign of giving up.

As for the parity error, are there any other things I can check or replace? I didn't find any FX784 board set for a T4 on ebay yet...

have you tried to contact MAZAK Europe to see if they still keep these FX784 boards.

GuntisK · Jan 2, 2023

B.V. said:
As for the parity error, are there any other things I can check or replace? I didn't find any FX784 board set for a T4 on ebay yet...

Accidentally I have complete CNC system rack from CAM T-4... Have to check if there is an FX784 in that pile.
Monitor for MAZAK could be changed to LCD with use of XVGA Box, like I did to my QT15 years ago. Works perfectly although XVGA is a bit expensive (GBS8200 will no work if any... ).

B.V. · Jan 2, 2023

noname777 said:
have you tried to contact MAZAK Europe to see if they still keep these FX784 boards.

Yes, they gave me also the procedures with the dipswitches to reset the memory.
Now I'm waiting what they say.

GuntisK said:
Accidentally I have complete CNC system rack from CAM T-4... Have to check if there is an FX784 in that pile.
Monitor for MAZAK could be changed to LCD with use of XVGA Box, like I did to my QT15 years ago. Works perfectly although XVGA is a bit expensive (GBS8200 will no work if any... ).

That would be helpful if you have a replacement board.

For the LCD conversion, I may be thinking of using this system: https://www.aceinnova.com/en/projec...r-x2vga-from-cga-ega-mda-hercules-ttl-to-vga/
I send an email to the vendor. If the price is good, I will give it a try.

sudsy55 · Jan 2, 2023

I used one of these years ago on my M2 https://www.ebay.com.au/itm/1949756...yISzqdHfStdaOl663GTxRtC74V|tkp:Bk9SR8iDnsquYQ. Had a LCD monitor and stripped it back to fit in the space and worked a treat.
As for the FX784 you should be able to use any FX784 or 884 and swap your software chips onto it and change the jumpers to suit as far as i know so don't quote me lol

noname777 · Jan 2, 2023

sudsy55 said:
I used one of these years ago on my M2 https://www.ebay.com.au/itm/194975687843?hash=item2d6574e4a3:g:g-wAAOSwA45iVo7H&amdata=enc:AQAHAAAA4Iu9lLTz1Ei0/f2Ox3O41V3aQ0LjOOwrWsiBxW6FKmWWI0l+DDnE4aFKXtotsjbUeyrEk/Ap76Cqw0LuP/J8XpYELcbPVHOKt2y6cvE8ZgJjJQprNVfADgfLMfI0KUAbVWaS1pvd0gK7hv/CShboxTH41/0ccgU6a5Fi4XstbFSo3Nu3WWSt2pOxS7jE+fxWuu5DLtryveUbkK0XdcQTMreS4EsO0SfQqBEl1ZTQ5rd7Tg0WN7KoECxKD4k03nM7LpPYjkakj0WSeS52nnyISzqdHfStdaOl663GTxRtC74V|tkp:Bk9SR8iDnsquYQ. Had a LCD monitor and stripped it back to fit in the space and worked a treat.
As for the FX784 you should be able to use any FX784 or 884 and swap your software chips onto it and change the jumpers to suit as far as i know so don't quote me lol

He has PARITY error. What memory is corrupted? RAM or ROM? if ROM that he cant just swap them.

B.V. · Jan 5, 2023

noname777 said:
He has PARITY error. What memory is corrupted? RAM or ROM? if ROM that he cant just swap them.

It is the second LED on the board (PE1) so that should be the RAM memory faulty.

I ordered GBS 8219, hopefully I get it soon so we can continue.

noname777 · Jan 5, 2023

what amazes me is that none of creators of MAZATROL T2 probably ever thought that people would use this control for almost 40 years. The quality of electronics engineers, Mitsubishi employed at that time, is mind blowing.

B.V. · Tuesday at 7:13 AM

I received the GBS8219 converter and installed it to the mazak. This is the perfect solution to retrofit a LCD instead of the poor CRT monitor!
Another problem solved.

Only....

I started my machine this morning to test the display. All led lights on the control panel were flickering around. Checked the parameters, they were all gone...
Checked all the batteries, all of them are around 3.7V connected to the board. How can the control lose its parameters with good batteries?

So, back to the beginning.
I did the memory initialization by RS232 with hyperterminal but this looks it doesn't work anymore.
When I switch on the machine with dipswitch 8 toggled, I get the Meldas monitor message in hyperterminal so communication looks OK. After typing the code and switch off the control, the parameters are not 0.
I typed several times the combination for resetting memory but the asterisks and weird parameters are still in the memory...
Only thing that was solved are the led's flickering.

Tried the method with dipswitch 3 several times, no succes...

Are my FX boards completely dead now?

B.V. · Tuesday at 10:28 AM

I removed all boards and drained caps again, reinstalled and now parity led FX784-8 is off??
The weird thing is, I still can't re-initialize memory, not with dipswitch 3, not with hyperterminal...

Tried to adjust parameters. I can change the odd parameter numbers but the even numbers have something strange.
The first bit of all even parameters is 1 and I can't change this.
It looks like the first bit is constantly held high during read/write operation of the memory. Could be a bad chip, pcb track or other short circuit in the board...

Looks like I need a new FX784-8 board I guess.
Can I use a T2, T3 board in my T4 control or maybe a M2?

B.V. · 2023-01-18T14:42:14-0600

I can't get this problem out of my head.

Today, I read the YM/YT manual again and found that all parameters are stored on the FX27(727) board and not on the FX784:

Looks like maybe I was wrong all the time and I should look at the FX727 board instead of the FX784-8.

Took the board out to recheck it as I already had to repair this board. It is not in very good shape, a lot of beginning corrosion...
Gently cleaned it as it contains a lot of dirt, drained cap, installed battery and board back in the machine.

Here it comes. Powered on, no hydraulics and the ON and OFF button lights at same time.
Unfortunately, parameters still are all crap and still can't change the first bit of the even parameters.

Now comes the question: Did I fried the FX727 board as well or am I right with the only defective board being the FX727?
Yesterday, I tried all kind of things to get it run again but nothing changed.
Today, the only board I touched was the FX727 and now suddenly the hydraulics etc. don't work.

I found a FX727 board and a FX884 board from the same machine on Ebay.
Can this FX884 work on my machine?

noname777 · 2023-01-19T03:19:25-0600

B.V. said:
I can't get this problem out of my head.

Today, I read the YM/YT manual again and found that all parameters are stored on the FX27(727) board and not on the FX784:
View attachment 384394
Looks like maybe I was wrong all the time and I should look at the FX727 board instead of the FX784-8.

Took the board out to recheck it as I already had to repair this board. It is not in very good shape, a lot of beginning corrosion...
Gently cleaned it as it contains a lot of dirt, drained cap, installed battery and board back in the machine.

Here it comes. Powered on, no hydraulics and the ON and OFF button lights at same time.
Unfortunately, parameters still are all crap and still can't change the first bit of the even parameters.

Now comes the question: Did I fried the FX727 board as well or am I right with the only defective board being the FX727?
Yesterday, I tried all kind of things to get it run again but nothing changed.
Today, the only board I touched was the FX727 and now suddenly the hydraulics etc. don't work.

I found a FX727 board and a FX884 board from the same machine on Ebay.
Can this FX884 work on my machine?

This is insane amount of drama you are going through. Actually we can only access MELDAS manuals and never MAZAKs ones. MAZAK is so secretive organization that I wouldn't be surprised if they were changing a lot while developing MAZATROL, just to make sure MITSUBISHI parts wont be easily interchangeable.

P.S. I used to own BMW E46 , 2002 year, amazing car.. but amount of time I spent trying to fix all issues and oil leaks was insane. Than I sold it and bought old MAZDA 3. Guess what? NO issues at all and all my free time is dedicated to sport, reading books and drinking Japanese beer

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Mazak Quick Slant 30N CAM T4 rescue or retrofit?

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