Polar 137 EMC-MON cuttng problem

Hi,
I am getting the error message Presszeit Unterbrochen whenever press the cut buttons on this cutter.Prior to this error clamp does function manually when foot pedal is actuated. But when error occurs after actuating cut buttons,clamp and knife do not come down.If i now press foot pedal,clamp comes down but does not return up unless machine is switched off and on again.
What is the remedy to this problem? and how do i change the language to english from the s7 swtches on cp1 card.
Thanks for a prompt response.
Machine number is 6241216 and a drawing will also be required to assist in troubbleshooting.
Wunmi-50

 

Hi Wunmi!

The first step would be to change the langue.
Normally you don’t need the DIP switches on the PI to change the language on the screen. The language selection using the DIP switches on the boards PI is only active if the battery on the Board CP1 is empty. In this case the machine is not able to memorize the let setting of the language and you have to scan the reference point after every switching time on machine.

How to change the language?
One of the keyboard push buttons has the letter “O”. This letter gets you to the “FUNCTION SERVEY” (in German this would called “FUNKTIONSÜBERSICHT”)
In this menu you have the possibility to select further sub menus.
The language selection is the number one.
German view = (1) SPRACHE UMSCHALTEN X
English view = (1) SELECT LANGUAGE X
The designers added a star behind the text to guide the operator to the language selection in case he does not understand the preselected language.
To get to the next nevel you push “1” (and maybe “=”, depends on the software version).
To change the langauge you select “2” for English (and maybe “=”, depends on the software version).
Usually the software gets you automatically back to the window “PROGRAM DATA”, which is the view of the last used cutting program. If not just push twice “=”.
Changing of the language is ready.

Your machine was built in 1994. If you like to change the language on the electronic board you have to switch the machine off first. You take the board PI (not CP1) out of the machine. Don’t place the board on the table of the cutter, this may break the electronic components. On the bottom of the board PI you see a package of 8 DIP switches. This whole switch is called S7. The whole switch has 8 little selectors. I Thing the selector S7.1 is on the right side.
The setting for English is:
S7.4 OFF
S7.3 OFF
S7.2 OFF
S7.3 ON
The setting for German was:
S7.4 OFF
S7.3 OFF
S7.2 OFF
S7.3 OFF
Afterwards you put the board back into the machine.
Attention! The Machine starts with the last preselected language. The new setting on the board PI, does not automatically change the language on the display.

Now let’s take a look for your real question.
Instead of getting the error message “PRESSZEIT UNTERBROCHEN” you will get now (using English) the error message “CLAMPING TIME INTERRUPTED”

This message means:
The control unit allowed the operator to start a cut cycle. The order to start the cut (using the two cut buttons) was accepted. All necessary test before cutting have been done successfully. The clamp is ordered to be lowered.
This is you status. The question is now, why the clamp is not lowering without foot pedal?
If you lower the foot pedal it looks like (because we don’t know if we really have pressure) the cut is working.

The first check would be the output of the control unit to order the hydraulic valve for clamping to close. Therefore you have a LED on the board SK. The numbers of the LED’s are printed on the board just beside the individual LED’s. The LED V84 (I think it is the second from the top) indicates the order to lower the clamp. To check this function, you activate the cut buttons (not using the foot pedal) and watch the LED.
If you use the food pedal you should have the LED V84 first active and a bit later the LED V89 (I think it is the last red LED from the top).
I think this test will be positive. Usually you have a problem with the hydraulic.
But unfortunately you cannot easily fix the hydraulic. The best way would be a real specialist for Polar cutters with the right spare part. But this is the next step.

To send you an electrical drawing I need an Email address. The drawing will not really help you in this case, but you should have one. It is always funny to see how people buy second hand machines from not reliable dealers. Often (or better mostly) the new owner does not get correct machine documentation (which should include operating manual, spare part book and ALL drawings), instruction and a bit of support.

Awaiting your answer

Best regards
Coloured paper

 

Hi CP,
Thanks for your ever educative response and apologies for my late reply.I can confirm that all your comments concerning my post are true reflection of the state of this cutter.The clamp does operate via the foot pedal but when cut buttons were pressed( without pressing foot pedal) the top three red leds v84,89 and third led(not too sure of number),all blink in quick succession(flicker) without any clamp movement and with the error message (Presszeit Unterbrochen).
As for the language selection,i changed the s7 dip switch number1 from 0 to 1,with others at zero without success,so i will try out the other method in your outline.

My email address is alfrejiny@yahoo.com.

Respectfully Submitted,
Wunmi-50.

 

Hi Wunmi!

Assuming the control system works fine you need somebody checking the hydraulic valves. Unfortunately you cannot do this by yourself. All hydraulic valves for clamping and cutting are made doubled for safety and you don’t know which of the both valves is not working. Maybe a valve has to be changed.

The best and easiest way is to get help from a specialist for Polar cutters. Usually this is the local Heidelberg agency. In your case this would be:
Heidelberg Nigeria Ltd.
38/40 Association Avenue Ilupeju,
P. O. Box 17257, Ikeja
Lagos / Nigeria
Telefon: +234 1 7746782
Telefax: +234 1 3205537
E-Mail:hnl@heidelberg-ng.com

Good luck
Coloured paper

 

Hi CP,
Thanks once again for your reply,i will see what can be done as you advised to resolve this fault and get back to you.
Meanwhile,kindly forward the drawings for my use to the email address given earlier. I remain grateful.
Wunmi-50