Heidelberg DI classic

Some of the people in this group have suggested that the Plus or pro is a better option to buy as opposed to the Classic however there seems to be little explanation as to the reason. Is there a compelling reason not to be involved with the Classic. Is the line resolution of imaging units on all three presses similar.

Regards
Graham

 

Hi,

Heidelberg made quite a few improvements to the DI on the plus & pro models.

Redesigned the silicon extraction
Redesigned the plate clean
Faster imaging speed
Option of an impression cylinder washer
Redesign of ink ducts
Automated lubrication system
Disconnection of delivery on the pro when imaging, for less wear on the chains
Touchscreen control on the pro
Improved impression grippers on pro
Stream feed on pro
Infeed register system on pro

Resolution of all machines is the same, but the RIP's will be different on the models.

The classic can be a bit more time consuming in certain areas.

Regards.

 

Hi Mr H,
Thanks for taking the time to reply. Most helpful!
If I may, I would like to follow this a little further.

Redesigned the silicon extraction.
This may indicate spots left on the plate. If so is it possible to overcome this or is it something to be lived with.
Redesign of ink ducts
Do the classic ducts still control ink levels successfully.
Stream feed on pro
Infeed register system on pro.
The classic has a direct from pile feeder then? So no close registration work after the sheet has been through the press.

With these things taken into account, would you still purchase a classic if the other models were not an option right now. Are there people successfully producing good quality work with these machines with little frustration.

Thanks for your help

Graham

 

Hi,

The original silicon extraction was not optimally designed. On the plus and the pro the vacuum gap was narrowed and the actual units moved towards the plate for better suction so in answer the original units worked but the later ones worked better !!

The classic ink ducts work fine, the plus and pro ducts allow for a greater potential adjustability of a jobs profile.

The classic and plus could have an issue if on a close register 4 colours job with a second pass spot colour, there may be a bit of movement due to there not been a sidelay and front lays, (but a good quality stock that has been trimmed may help) the pro would be fine in that respect.

Personally i would go for a plus (or even better a pro if the funds allowed) There are many people who use the Heidelberg DI presses that are very happy with what they can produce. I know many printing companies that have gone from strength to strength with a QM DI press, and have given the owners many new houses and new cars !!

Regards.

 

Thank you Mr H.
Seems the Classic will work OK.
You haven't suggested there being any real head aches.
Just one question! You said all machines have capability for the same line screen resolution. What is the highest practical res. possible?

You are a H demonstrator!
Do you work only in your country or do you go to other parts as well?

Regards
Graham

 

Hi,

Resolution can be 1270 or 2540. Most people use 1270 as the imaging time of 2540 is longer for not a great difference comparing side by side, skin tones can look a little better on the higher res.
I can and do work anywhere.

Regards.