Polar Mohr Memory Issues

[Sijo]

Hi ,
I have polar mohr. its backage is not comming to front automatically after it touch back position. The other problem is we can't take programs from memory. no display on program select.
I hope you can understand the problem

 

[Coloured paper]

Do you have any error messages on the screan?

 

[Sijo]

there is no error messages. when the backage will reach middle portion the display will come and start reading of encoder. but the program selection display will remain blank. if we push the buttons under program selection display there is no response. manual cutting is possible by enter the values each time

 

[Coloured paper]

This is not an original Polar cutter. Does the cutter has an additional control unit, like a modification called Micro cut or Gergek?

 

[Sijo]

I will share plc no

 

[Coloured paper]

Hi Sijo!

Your machine is a EMC I machine. The machine number is probably 5116065.
When you switch the machine on, you have to scan the reference point first. This means in the beginning you have to move the backgauge to the end of the table and afterwords back to the front. The backgauge will not automatically change its direction. In the operating manual you have on page 2 an instruction.
If the start-up sequence does not work, you may have a lot of problems. It can be the backgauge motor speed is wrong. It can be the linear scale underneath the table is broken. Maybe because you opened the keyboard with the computer, you have no loos contacts.

The only idea I have is the following. Try to send NimeshSilva here in the forum a message.

Good luck
Coloured paper

 

[Sijo]

do you have operation manual for this machine ? it is very helpful for me

 

[Coloured paper]

Yes I have an operating manual. Do you have an Email adress?

 

[Sijo]

yes,

sijovb@gmail.com

 

[Sijo]

hi ,
I tried with operating manual, but no way to clear problem. whats next ? now it is working manually by entering every measurements. do you think this problem related to PLC ? This has began when some thing occured on power supply board. At that time 5 v was missing. when we cleared that problem the measurement display came but the problem limited to memory. have you any idea of power supply section ?

 

[Coloured paper]

The only idea I have: Try to send NimeshSilva here in the forum a message.
You need an old service engineer who knows this machine generation.
Coloured paper

 

[Sijo]

hi ,
I tried with operating manual, but no way to clear problem. whats next ? now it is working manually by entering every measurements. do you think this problem related to PLC ?

This has began when some thing occurred on power supply board. At that time 5 v was missing. when we cleared that problem the measurement display came but the problem limited to memory. have you any idea of power supply section ?

can you identify WPS card in this machine

 

[Coloured paper]

The WPS is not on these pictures. And there is a high to break more than you can fix.
You can buy new boards. But I am not sure this would help you.
You need somebody who has knowledge about this machine.
Did you tried to contact NimeshSilva here in the forum?
Coloured paper

 

[Sijo]

I messaged to NimeshSilva. Didn't get response. What is meant by WPS ? where it is located ? Yesterday I got memory display for few seconds when I down the knife manually. But machine was struck at that time. No buttons working.

 

[Coloured paper]

WPS is not really related to basic machine functions. WPS is the memory for the cutting programms. The machine EMC I has no memory you are locking for.

 

[Sijo]

Polar Mohr EMC 92 is the model. It has one memory slot. and memory s battery showing 3.7 V

 

[NimeshSilva]

Hi all

First of all I"m really really sorry for the delayed reply. I couldn't login to the forum for few weeks as I get hundreds of work. I just logged in and saw Mr.CP had suggested me and just saw your PM. I didn't see even a mail that I have a PM. Sorry guys again..

Thanks to Mr.CP I have a little experience with the EMC I series machines (I must honorably mention Mr.Colored Paper here, without him, I'm hopeless too)

Dear Sijo,

First of all, This is not a PLC. This is the original computer made by Polar Mohr. and unfortunately EMC I machines don't show up any error codes as they do in EMC II series. So its bit hard to diagnose.
I can understand your problem. (I don't know you've fixed it by now, But I'll share my experience here now)

You said you're getting the backgauge reading correctly (in mm or inch, it doesn't matter) and it will position correctly once you enter the measurement from the keyboard and press the "=" key twice, right? it means the CPU is working.

Ok, lets diagnose the fault now, (but remember in this series, the backgauge doesn't go up to the end of the table as EMC MON's do. it only travels to the middle of the table)
and yes, if the memory box is empty, you should get "1 0" in the memory display once the calibration (startup procedure) has over. if not most probably the reason is the N-DS card (so called the memory box, it is in the upper panel with 2 holes on it, so you can put your fingers and pull and take it out.) Yet, there are several reasons for this issue,

1. seven segment displays on the memory display portion has burnt.
I'll tell you the check. as soon as you press the green start button for the second time, do not press the handwheel button, instead, press the red "program stop" button twice. then all the LEDs, lamps in the buttons and 7-seg displays should light up. This is the lamp test and this way you can make sure the 7-segs are working.

2. the memory box is not properly connected.
this memory box has a centronics connector (a printer port like connector) and it should be connected to the back-plane board firmly. otherwise the CPU will not recognize the memory box's presence. so it will notify the user in that way (no memory display).

3. the memory box is bad
This is rather unfortunate. the easiest way to check it, you can move it to another EMC I machine and check it for its functionality. (since you've mentioned the battery voltage is 3.7V, then the battery is ok)

And since other functions have no issues (backgauge movement, measurements, clamping and cut) then all the other seems ok. please check for the above and let me know. (No need to use PM, you can post it here)

And tell me about the "Big-bang" you got before all these. what was the problem? what was happened? and what have you done in order to correct it? Any burns in No.2A card in the bottom panel? sometimes, there can be noises in the backgauge motor brake (not the table brake), check there too.

Please apologize me once again, I really didn't see any of your messages. But from now on, I'll keep in touch

Anyway, Hope this helps

 

[Sijo]

Hi all

First of all I"m really really sorry for the delayed reply. I couldn't login to the forum for few weeks as I get hundreds of work. I just logged in and saw Mr.CP had suggested me and just saw your PM. I didn't see even a mail that I have a PM. Sorry guys again..

Thanks to Mr.CP I have a little experience with the EMC I series machines (I must honorably mention Mr.Colored Paper here, without him, I'm hopeless too)

Dear Sijo,

First of all, This is not a PLC. This is the original computer made by Polar Mohr. and unfortunately EMC I machines don't show up any error codes as they do in EMC II series. So its bit hard to diagnose.
I can understand your problem. (I don't know you've fixed it by now, But I'll share my experience here now)

You said you're getting the backgauge reading correctly (in mm or inch, it doesn't matter) and it will position correctly once you enter the measurement from the keyboard and press the "=" key twice, right? it means the CPU is working.

Ok, lets diagnose the fault now, (but remember in this series, the backgauge doesn't go up to the end of the table as EMC MON's do. it only travels to the middle of the table)
and yes, if the memory box is empty, you should get "1 0" in the memory display once the calibration (startup procedure) has over. if not most probably the reason is the N-DS card (so called the memory box, it is in the upper panel with 2 holes on it, so you can put your fingers and pull and take it out.) Yet, there are several reasons for this issue,

1. seven segment displays on the memory display portion has burnt.
I'll tell you the check. as soon as you press the green start button for the second time, do not press the handwheel button, instead, press the red "program stop" button twice. then all the LEDs, lamps in the buttons and 7-seg displays should light up. This is the lamp test and this way you can make sure the 7-segs are working.

2. the memory box is not properly connected.
this memory box has a centronics connector (a printer port like connector) and it should be connected to the back-plane board firmly. otherwise the CPU will not recognize the memory box's presence. so it will notify the user in that way (no memory display).

3. the memory box is bad
This is rather unfortunate. the easiest way to check it, you can move it to another EMC I machine and check it for its functionality. (since you've mentioned the battery voltage is 3.7V, then the battery is ok)

And since other functions have no issues (backgauge movement, measurements, clamping and cut) then all the other seems ok. please check for the above and let me know. (No need to use PM, you can post it here)

And tell me about the "Big-bang" you got before all these. what was the problem? what was happened? and what have you done in order to correct it? Any burns in No.2A card in the bottom panel? sometimes, there can be noises in the backgauge motor brake (not the table brake), check there too.

Please apologize me once again, I really didn't see any of your messages. But from now on, I'll keep in touch

Anyway, Hope this helps

Dear Silva,
Thanks for your valuable suggestions. I checked the battery voltage , Its showing 3.6v. When I removed the N-MS card and switch on the machine the memory display is came as 1 0. I attached some photos for reference.

 

[NimeshSilva]

Hello

The N-MS card controls the blade. Without it you won't be able to cut. But it's a good sign that you're getting the memory display even without it.

Now you proceed like this. With the N-MS card removed. You turn on the machine and try to do the backgauge calibration. (Can't remember it is possible to do the calibration without it. But it's worth a try) if you're able to get the backgauge position on the measurement display, then try to save some measurements in the memory. (Do it in your normal way. I.e. type the measurement from the keyboard and press the "dot" sign.) And see whether it saves the values. Then repeat it 5-6 times and then check them again. If it saves the measurements correctly, then we can confirm the memory box, connectors, N-CI card are fine.

Try several times plugging in the N-MS card and check. If you always getting the memory display without the N-MS card, then there might be a problem with the N-CPU card and/or N-MS card itself.

You check the above and let me know first.

Nimesh

 

[Sijo]

Dear Silva,
Thanks for your valuable suggestions. I checked the battery voltage , Its showing 3.6v. When I removed the N-MS card and switch on the machine the memory display is came as 1 0. I attached some photos for reference.

Dear nimesh silva ,
sorry for delayed reply. I tried few times as you suggested.
1. W/O N-MS card.
when RED button pressed display will glow all lights including memory display
Backage display will come after backage calibration
Memory display is comming '1 1'
Measurement from keyboard is not working
We can't do cutting also
2. W/O N-MS and W/O Memory Box
Same as above. The only difference in memory display '1 0'
3. W/O N-CI Card
Memory Display '1 ' and keyboard display ' 0 '
Backage will not work after initilization
d37 - light will glow on N-MS card when obstacles in front of light barrier



the machine is working manually by entering values from keybaord. the only problem is
not getting programs from memory.