need real world feedback of the HP W800

[balstestrat]

Yeah you should have at least one set of printheads and cleaning cartridge always on your shelf for the bad&busy days.
They wear and if you use the machine the amount it should be used you will replace them in 6 months anyways.

 

[Simon Peach]

ok, will bear it in mind, thanks.

 

[Simon Peach]

Speaking with our reseller, it sounds like there should have been a spare set delivered with the machine, was this the case for everyone else?

 

[balstestrat]

Normally not. Only the one set that goes into the printer.
That might be resellers own decision.

 

[Simon Peach]

ok, thank you

 

[JohnvdH]

We already have the 800W almost a year now. Same story on every latex printer from 260, 360 uptill now differences in panel lengths wallpaper, from 0,3mm - 0,8 mm. We tried everything; Omas on of other profiles, new firmware. Result 0, still same issues. Is there anybody with THE SOLUTION for this problem?

 

[Simon Peach]

Quite a few of the bugs in our have been irons out now.

re. Wallpapers, we was advised to submit in tiles in batches of 2 to 3 to alleviate the stepping out.

 

[balstestrat]

We already have the 800W almost a year now. Same story on every latex printer from 260, 360 uptill now differences in panel lengths wallpaper, from 0,3mm - 0,8 mm. We tried everything; Omas on of other profiles, new firmware. Result 0, still same issues. Is there anybody with THE SOLUTION for this problem?

You have changed the take-up to work as "Do not apply tension"?
Anyway it sounds like you are inside spec. Lets say wallpaper is 3m long, it could be off 1.5mm and be in spec. Tiling length repeatability: +/-0.5mm/m

 

[Simon Peach]

Sounds interesting, is this in settings?

 

[balstestrat]

Sounds interesting, is this in settings?

It's in every profile settings under Advanced settings.

 

[JohnvdH]

You have changed the take-up to work as "Do not apply tension"?

View attachment 157520

We can't use this option because the wallpaper we use is to stiff
and will come to the curing system.

 

[Simon Peach]

Great, will check it out.

Does this mean it doesn't take up at all or just very loose?

 

[balstestrat]

Great, will check it out.

Does this mean it doesn't take up at all or just very loose?

It keeps it loose all the time but still collects on the roll.

 

[Simon Peach]

Thank you!

 

[balstestrat]

We can't use this option because the wallpaper we use is to stiff
and will come to the curing system.

Then what have you set it to? I would select "Always apply tension" and aim for as low as possible tension value.
You must understand you have material limitations and the heat, it will never be 0.0 accuracy.

 

[JohnvdH]

It keeps it loose all the time but still collects on the roll.

For us it

Then what have you set it to? I would select "Always apply tension" and aim for as low as possible tension value.
You must understand you have material limitations and the heat, it will never be 0.0 accuracy.

We use: Allways tension, 6 Nm input tension, output tension 25 Nm, curing temperature 90 degrees. Wallpaper Desardi.

 

[balstestrat]

Well you have a fuckton of output tension. Is that material really so rigid it needs that much?
Btw to keep the balance between input and output, you should have a little more input tension. I would put at least 15.

 

[JohnvdH]

Well you have a ****ton of output tension. Is that material really so rigid it needs that much?
Btw to keep the balance between input and output, you should have a little more input tension. I would put at least 15.

thanks! we'll try these options.

 

[Mike Perth]

We already have the 800W almost a year now. Same story on every latex printer from 260, 360 uptill now differences in panel lengths wallpaper, from 0,3mm - 0,8 mm. We tried everything; Omas on of other profiles, new firmware. Result 0, still same issues. Is there anybody with THE SOLUTION for this problem?

Hi John, We gave up on heavyweight wallpapers as could never get them to print well on our 800w. We’ve got non woven dialed in now and we’re running in a sweet spot where all our WPs are perfect in length. With heavyweight substrates we always had length issues and the media appeared to buckle and distort too.

 

[JohnvdH]

Hi John, We gave up on heavyweight wallpapers as could never get them to print well on our 800w. We’ve got non woven dialed in now and we’re running in a sweet spot where all our WPs are perfect in length. With heavyweight substrates we always had length issues and the media appeared to buckle and distort too.

Thanks Mike, we'll consider this as we still have the same issues and it's even getting worse. The technician can't solve it. So we now go to higher level. Calling HP. But I think when they know the solution they already did an upgrade, so I am not so hopeful...