Hello everybody, ๐
I have been printing 60 gsm carbonless paper for 15 years on a Riso MZ770 without any problems, except with CFB, which is always more difficult to feed.
Almost a year ago, I replaced the MZ with a SF5350 EII that was practically new (from 2021 / barely 1 million cycles).
In the early months, carbonless printed just as well as on the MZ.
But since about 3 months, when I print 60 gsm NCR it goes well at the beginning, but after 1000 or so printed sheets, the paper start to wrap around the pressure roller (whether CB, CFB, or CF) and causes a jam (with a characteristic โscrapingโ noise). As printing progresses, these jams become more and more frequent, to the point of occurring every 10 sheets or so, even when the speed is set to minimum.
I never saw that on the MZ !
Of course, when this happens, I try to clean and deglaze the pressure roller with alcohol, but it doesn't make any difference.
Is this a sign of a malfunction/worn part?
Should I deglaze with a more suitable product (which one?)
or something else?
Thanks for you help
I have been printing 60 gsm carbonless paper for 15 years on a Riso MZ770 without any problems, except with CFB, which is always more difficult to feed.
Almost a year ago, I replaced the MZ with a SF5350 EII that was practically new (from 2021 / barely 1 million cycles).
In the early months, carbonless printed just as well as on the MZ.
But since about 3 months, when I print 60 gsm NCR it goes well at the beginning, but after 1000 or so printed sheets, the paper start to wrap around the pressure roller (whether CB, CFB, or CF) and causes a jam (with a characteristic โscrapingโ noise). As printing progresses, these jams become more and more frequent, to the point of occurring every 10 sheets or so, even when the speed is set to minimum.
I never saw that on the MZ !
Of course, when this happens, I try to clean and deglaze the pressure roller with alcohol, but it doesn't make any difference.
Is this a sign of a malfunction/worn part?
Should I deglaze with a more suitable product (which one?)
or something else?
Thanks for you help