banner printing

[Chris Wool]

on the soljets we can raise the head or do you think that the heat is upsetting things

chris

[Rodney Gold]

Best way is to pre feed the banner and then roll it back – using the machine itself.
Failing that , use bulldog clips with weights (those things that keep table cloths down in the wind and hang off the cloth) on the leading edge.
Also you can pre roll the banner off the roll behind the machine.
Failing that , use an assistant to exert a little pulling on the banner or pull the parts cockling straight as it prints
loading tha material dead straight works too
Easy way to get the leading edge dead straight is to wind the material tight on the core, draw a line from one edge of the core to another that is dead straight across the top , cut it there and then line up the leading edge with the edge of the printing platten and you are assured of the roll not feeding skew. If you have a heated platten , this too could cause the material to ruck or cockle if too hot.

[Mike Grant]

Rod I think he is referring to across the printing width not the length.

I found out very early not to leave the roll set up on the machine whilst fafing around with the software as the heater element caused the banner vinyl to soften to the point I had the same problem, but as the material got to the cooler bits it run ok. So put the material in after you have got everything else ready on the computer.

[Andrew Boyle]

Hi,

thanks for your responses…

reduced the heat to minimum [20 degrees]……still the same problem…….didn’t want to move the head up too much as I could see that there still would be a problem by looking at the material [mounds]……..do you think it’s a problem with the material?

Cheers

Andrew

[David Rowland]

u need to find the optimum heat between pre-heat and print head heaters, they are normally about 5 degrees different.

U do need to print on “thick” head setting

Not all PVC banners take the heat well and buckle, make sure your using a banner substrait that is suitable, however the JV3 will print on most.

I think our banner material is cooked somewhere in the 40s.

Dave
JV3-160s

[Andrew Boyle]

Cheers Dave,

will try new material that’s arriving today with the temp changes as suggested…thanks for your help

Andrew

[Andrew Boyle]

All banners printed ,,,,,,,, this digital stuff is a big learning curve ,,,,,

had to return previously purchased materials,,,,,

Thanks for the help

Andrew

[Simon Bingham]

The error is due to faulty banner material occurring in the manufacturing process.

2 suppliers in Bristol and Dundee have had a faulty batch recently.

Don’t waste your time, just reject the material

[DARREN]

Hi there,

There are two different types of banner material in the uk market at the moment, ‘pvc coated’ and laminated.

the pvc coated banner is normally much stronger,can be durable for upto 3 years and will not normally react badly to temps of 50, 60, or even 70 degrees, the laminated banner which is normally made in the far east where wages ar low is a different process all together which is quicker and cheaper, but is not very strong, very low quality, durable for upto 12 weeks if you’re lucky and doesn’t like heat. this type of banner will normally cockle and tunnel when heated much above 30 degrees because the pvc has only peen pressed both sides of the weave by heated rollers.