odd Vutek GS problem ,hunt goes on

[ellsmako]

had some 60mil styrene that printed fuzzy on one side ( so thats 4X8 ) printed along the width 8' and 4' deep ) side closest to controller was fuzzy .

Verified everything, finally tried a different material ( same thickness ) and it was great. Then retried the same material, fuzzy,...

rotated the sheet 180 degreees and its fine. rotated again and fuzzy. all other production was great.


Supplier of material gets al call monday. Have noticed that many material from different suppliers have changed formulation or so it seems.
Personnaly believe that the corporate bottom line is changing quality standards. Materials that we have used for year is getting bad, curling defects etc are the norm. We use only "higher" quality materials and now have had issues. Suppliers have stood behind their products but that does not help a deadline.

anyone else.

 

[WYLDGFI]

static on the material? Where is the material coming from?? It kinda odd that you rotate the material and its ok. Is it consistent thru the sheet as they come off the stack its all the same direction? Could the material foot...not sure the GS has one like the QS....be sensing slightly differently on one side vs the other? Maybe reposition where it senses the thickness of the material. Have had that problem in the past where we had to move it over to get a better bi-directional registration for the print.

 

[ellsmako]

Well the GS differs from the QS and Pressvu's because the back hold down roller measure the thick ness and head is dialed into the software. We were using two large $1500 static ion blowers . dug down 15 more sheet and problem was gone ( the new batch which was not rotated in was 17 sheets ) so it for sure material. but still the thinking was valid. material was flat but ink seem odd.

Material was US made ( or so they say )

 

[WYLDGFI]

yeah....sounds like material. Typically we order sheets by the skid...so its all consistent from start to finish. If theres a problem with one sheet...likely 100 sheets down it'll be the same problem.

 

[miker]

yeah....sounds like material. Typically we order sheets by the skid...so its all consistent from start to finish. If theres a problem with one sheet...likely 100 sheets down it'll be the same problem.

Not necessarily true. Depending on environmental variable and how the material was stored and stacked by your vendor we almost ALWAYS seems to have the most problems on the top and bottom of skids. Not sure why on the top, but the bottom because they weight of a full skid of material seems to create a stronger static charge.