Heidelberg SM 72VP Electrical Issue

[marg_lucas]

Our client has advised that when he is installing the Heidelberg SM 72VP press he has the issue below:

All indicator lights off except unit 1. We have tried troubleshooting by checking the contactors in the main power cabinet. We assume it might be a sensor that is engaged or there might not be any power supply going through to unit 1 due to a broken cable.

Please point us in the right direction if you have come across this issue before.

Thanks
Margaret Lucas
whatsapp: 61408358143
email:mlucas@asnewprint.com.au

 

[junker1984]

What is the year of manufacture?

 

[marg_lucas]

1982

 

[junker1984]

Make sure all Anphenol connectors are fully seated (junction boxes under OS catwalks). Examine pins in each cable plug of those Anphenols ai printing unit 1 and 2. It would seem you have a break in control voltage continuity.

 

[marg_lucas]

Thanks so much. Appreciate your assistance
Kind regards
Margaret

 

[CHOCK]

Fix it sir?

 

[ADK]

Hi sir our machine 72vp have electrical problem when we start machine printing every 20 ,or 30 second after running machine coming off. No any error please help me

 

[CHOCK]

Hi Sir:

Will be great idea, if you test the RECTIFIERTS MODULS!!!!!!

2) Power converter SLT( normal thyristors ARE FAULTY)!!!!

3) Regulated Power Supply : NTL 5+ 24 in tolerance....!!!!

 

[Kylin machinery]

Here are a few specific areas I’d recommend checking:

1. Safety Guard Limit Switches: The SM 72VP has a series-connected safety circuit. If a guard on Unit 1 is open or a limit switch is faulty, it often cuts the power/signal to the subsequent units. Check the switches on the foot guards and delivery unit specifically.
2. Inter-unit Cabling (The 'Umbilical' Cords): Since the machine is being installed, check the heavy-duty plugs and sockets between Unit 1 and Unit 2. A bent pin or a poorly seated connector here will prevent the 24V DC signal from reaching the rest of the press.
3. Emergency Stop Loop: Verify if an E-stop button on the following units is stuck or wired incorrectly. On these models, the E-stop circuit usually runs in a loop; if it's broken at Unit 1's exit, everything downstream stays dead.
4. Galvanic Isolation / Fuse on Unit 1: Check if there is a specific fuse on the Unit 1 distribution board that handles the 'through-power' for the console lights of the remaining units.

Given that it’s a fresh installation, I’d bet on a loose connection or a misaligned safety sensor during reassembly. Hope this helps you narrow it down!"

 

[junker1984]

What do you mean by "coming off"? Coming off impression or shutting down completely? Or something in-between?

 

[ADK]

Hi Sir:

Will be great idea, if you test the RECTIFIERTS MODULS!!!!!!

2) Power converter SLT( normal thyristors ARE FAULTY)!!!!

3) Regulated Power Supply : NTL 5+ 24 in tolerance....!!!!

Thanks for your help got it the essu

 

[ADK]

What do you mean by "coming off"? Coming off impression or shutting down completely? Or something in-between?

Thanks for your help now is ok

 

[ADK]

Here are a few specific areas I’d recommend checking:

1. Safety Guard Limit Switches: The SM 72VP has a series-connected safety circuit. If a guard on Unit 1 is open or a limit switch is faulty, it often cuts the power/signal to the subsequent units. Check the switches on the foot guards and delivery unit specifically.
2. Inter-unit Cabling (The 'Umbilical' Cords): Since the machine is being installed, check the heavy-duty plugs and sockets between Unit 1 and Unit 2. A bent pin or a poorly seated connector here will prevent the 24V DC signal from reaching the rest of the press.
3. Emergency Stop Loop: Verify if an E-stop button on the following units is stuck or wired incorrectly. On these models, the E-stop circuit usually runs in a loop; if it's broken at Unit 1's exit, everything downstream stays dead.
4. Galvanic Isolation / Fuse on Unit 1: Check if there is a specific fuse on the Unit 1 distribution board that handles the 'through-power' for the console lights of the remaining units.

Given that it’s a fresh installation, I’d bet on a loose connection or a misaligned safety sensor during reassembly. Hope this helps you narrow it down!"

Thanks for your help now ok

 

[junker1984]

Great!