曲线问题
 

请问各位高手、海德堡CD102曲线怎样调整？

:super_man:你所说的曲线是指什么曲线？是特性文件？还是印刷补偿曲线？或者是CIP3曲线？

楼主说的是海德堡印刷机CD102上的一条曲线,在CP2000印刷机控制台上的一条印刷曲线,这个东东我也不太懂;2楼说的又是印前的几条曲线,两种不一样,CIP3放墨数据到海德堡印刷机上还要通过LZ所说的这条曲线放墨校正,楼主所问的就是这条曲线吧!!!

是印刷墨色补偿曲线:eyes_droped:

In Heidelberg print console. there are pre-inking curve and ink presetting curve. Which one you are talking about?

:secret_smile:I want to know what`s the different between pre-inking curve and ink presetting curve in Heidelberg press?
As i know, KBA press have one curve at all?

The ink preset compensation curve, is the compensation for the ink key value (position) for a kind of ink with a kind of paper according to the ink coverage of ink zone.
Pre-inking curve - in the job change, if ink rollers of printing units did not wash. The ink film thickness on the roller is correct for the last job. If the next job having a large different of ink coverage when compare with the last job. The ink key preset value would not have an instant effect on the change of ink film thickness. This will affect the no of sheet need to print to make the new ink setting become stable, this effect would be more obvious in Heidelberg press, this due to the ink path design of Heidelberg is longer than the other vendors. The goal of this pre-inking is try to correct this and make sure the ink key preset can be done within 150 sheets impression.
Almost all Japan presses having a feature (forgot the name) that operator would input the CIP/3 data of next job during the production of current job. The console would counter the no. of sheet need to be printed, which enter by the operator. For example, a job need to print 5500 sheets. During the production of this job, if the operator already enter the next job CIP/3 data, at the last 50 sheets of printing of current job. The console would change the ink key value for next job already. Remember that the change of ink key value would not affect the printing immediately, if will effect on the sheet may be 100 sheets later (the no. of sheets is depends on the ink path distance of the press). After change a new set of plate for next job, the new ink key setting would take a short time to reach stable.

How does the pre-inking curve work?What part it controled to reach the right ink thickness as soon as possible?
Does the pre-inking curve related to the Japanese feature?Just input the ink key preset data of the next job in press during the current job?
How to caculate the pre-inking curve ?By the same test like compensation curve?In mainland does a factory use this curve on their machine?How made this pre-inking curve?The operator can made it by himself?Or have to need the help of equipment supplier?
Sorry i have too much question about this pre-inking curve~I didn`t heart it before~Maybe i didn`t know heidelberg machine deep~

I does not a matter to ask so many questions, I believed that I asked much more than that.
Heidelberg does not like the Japanese press, operator need to run a speparate procedure, just 2 keys at the console, "print without vibrator" (the no of sheet need to print was pre-defined, different model has different no. of sheets). Then change the plates, after that apply the pre-inking curve. If the curve setup correctly, after certain no. of print the OK sheet would be reach.
Heidelberg has another test form for doing the per-inking curve. You need to print around 300 sheets and measure the density at every 50 sheets. By using this collected data with their own formula, then a curve can be plot.
I believed that almost all of the new Heidelberg press during installation, Heidelberg engineer should do this for the customer. I believed that the customer need to purchase the CIP/3 preset.
In German, Heidelberg Print Media Academy provide this is a part of training course. Having no idea whether the Heidelberg PMA in Shenzhen has this course or not.
At this moment I just know that this was done by Heidelberg engineer and they always telling customer this is company secret. I think they are worrying the operator just only part of the calibration and try to done it by themselves and come to the end and complain the system is no good.

俺看不懂英文;应该先换新的墨斗片.在调整,印刷机有色彩管理他会自动生成一条曲线,楼主可以根据他做相应的调节.

机器上的曲线就是文件生成时对应墨区墨色覆盖率,软件自动转换成墨量.在有两条,Z1和Z2,Z1是在30转,Z2是在70转.曲线就是在30的时候每一个数值代表一个墨点,70也是同样的道理.但你自己调的话没有专用软件,你是算不出图文的覆盖率的.所以没有把握不要去乱调.不过你可以通过逆向方式可以算出来.就是有点麻烦.我就是这样调的,不过说起来不够清楚.

楼上正解~！不过我还是有些不明白~！还请指点~！
当工程师校正好印刷机以后(墨辊各个位置下墨均匀，印刷测控条左右密度相等)
用相同的数据再印刷覆盖率不一样的测控条时为什么左右的密度又会发生变化？
请问覆盖率和下墨量之间存在着什么关系？请高手解答

该曲线，老版本是2条，30和70
新版本是一条
与纸张类别相关。

覆盖率和下墨量当然是成正比关系咯。具体算法我们没必要知道。
机器匀墨一般没那么理想，在墨色均匀的情况下还是准的。不过我还是有点怀疑工程师做的曲线，他的曲线测试版有点不合理。你可以自己重新设计一副版，自己做好一些。---------个人感觉。

使用的时候注意下墨斗片的新旧变化，温度变化。勤检查机器就好了。

强烈支持新版，用起来方便多了。呵呵。