What is SKY SHOT used for?

[slimslob]

Re: What is SKY SHOT used for?

mmmh...interesting, so if you were to get a full solid dark black image on entire page then obviously the Developer is doing its job correctly but if you were to get a really light black image almost like greyish, then you would have a bad developer right? or perhaps maybe even a worn out surface drum too right?

More a matter of if you run 500 sky shots and the image quality is not consistent for the entire run, you have a toner supply problem. If the density does not vary but is a lighter gray scale shade the problem could be dirty optics or dirty laser shield glass.

[blackcat4866]

Re: What is SKY SHOT used for?

More a matter of if you run 500 sky shots and the image quality is not consistent for the entire run, you have a toner supply problem. If the density does not vary but is a lighter gray scale shade the problem could be dirty optics or dirty laser shield glass.

This might be a useful method for diagnosing production print devices, but many 30cpm and less devices cannot re-supply toner fast enough to maintain developer density on images >50% fill, maybe 15pgs? I remember demonstrating this to my Konica Minolta rep on a bizhub C284e. He kept trying to tell me that it was impossible ... funny how I could repeatedly demonstrate it though? The customer was printing full 11x17 pages of Pantone 3155 (C: 100, M: 13, Y:0, K: 53). NOTE: C: 100%!! I wonder why the cyan developer kept detoning, LOL???

On most devices, a better way to determine developer viability is by checking the momentary toner density value, and to check heavy fill images for unfused or gritty areas (transferring developer starter). Also check for an extraordinarily heavy waste bottle (means that most of your developer is now in the waste bottle). =^..^=

[slimslob]

Re: What is SKY SHOT used for?

This might be a useful method for diagnosing production print devices, but many 30cpm and less devices cannot re-supply toner fast enough to maintain developer density on images >50% fill, maybe 15pgs? I remember demonstrating this to my Konica Minolta rep on a bizhub C284e. He kept trying to tell me that it was impossible ... funny how I could repeatedly demonstrate it though? The customer was printing full 11x17 pages of Pantone 3155 (C: 100, M: 13, Y:0, K: 53). NOTE: C: 100%!! I wonder why the cyan developer kept detoning, LOL???

On most devices, a better way to determine developer viability is by checking the momentary toner density value, and to check heavy fill images for unfused or gritty areas (transferring developer starter). Also check for an extraordinarily heavy waste bottle (means that most of your developer is now in the waste bottle). =^..^=

That is why I usually used Ricoh's checkered flag test pattern.

[copier tech]

Re: What is SKY SHOT used for?

hey guys,

Since I am fairly new to the copier industry, I wanted to ask here about the SKY SHOT thing that I have heard. What is exactly is it used for???

A sky shot was used on old analogue copiers to check for print defects, white lines / deletions or fusing issues. Lift up the ADF of plattern cover & do a copy of the sky. The Copy would be totally black.

This 'test' method is not needed now as all copiers can generate a test print using service mode etc.

[Copier Mechanic]

Re: What is SKY SHOT used for?

A sky shot was used on old analogue copiers to check for print defects, white lines / deletions or fusing issues. Lift up the ADF of plattern cover & do a copy of the sky. The Copy would be totally black.

This 'test' method is not needed now as all copiers can generate a test print using service mode etc.

Gotcha, that makes sense. Thanks!!