Hi all
This is a code I've been getting for a couple of months, I can easily work aound it, but seeing it's looking quiet next week, I'm thinking of having a proper look, so I thought I'd ask you fine people what I am missing, before I go digging in the wrong place...
I get this code first thing in the morning on the first run. The code essentially means that the paper has entered the ADU, the solenoid has triggered to close the gate, the direction reverses, the paper passes into the conveyance path triggers PS61, but does not reach PS23. The paper stops anywhere between conveyance roller 1 and 3, it is not consistent, and you hear the motor loading, which I assume is because conveyance roller/1 is still turning, but roller/2 or roller/3 isn't. The loading is the paper jamming up as the roller/1 tries to spin, but the leading edge of the paper is stuck at the rubber rollers that are not turning. I've attached a diagram from the theory of opperation manual below which may help make sence of that.
So, this is what I have done and my thinking, so feel very free to correct me...
FYI the type of media used and size, makes no difference, and it only occures after the machine has been idle for a period of time such as overnight.
Before you all shout clutches, all the ADU clutches were replaced in the last year due to another common ADU issue, and in case you're thinking one is duff, swapping them around makes no difference.
Next you're thinking what about the motor, yes, however this motor drives a lot of the conveyance rollers, and there is no issue when simplex printing just duplex. In fact if I run 20 sheets simplex, and then 20 sheets duplex, the loading of the motor reduces, eventually the motor sound is back to normal and the press will run duplex all day, until after the next idle period.
It's as if something is getting stiff...however, I can spin the ADU drive shaft easily by hand, all the rollers appear to turn freely, all the white idler rollers appear to be free rolling and I keep them clear of crud buildup anyway. The relevant motor M41 spins up fine through the I/O function.
I do have another M41 motor, but this is a last resort because really I don't want to change that as I know it'll mean ripping the guts out the back and this machine at this age is bound to play up after a good stripping. I have also swapped the HB Motor in the ADU.
I am considering stripping off the covers, overiding the door sensor and filming the belts/clutches/rollers and see what happens when the paper passes...or doesn't...
So any thoughts most welcome...
Cheers
Mark
ADU Diagram.jpg
Yes, I am an end user, but trust I don't take your expertise for granted, and always endevour to give back more than I receive.
The machine is a KM c7000, 12M clicks on the clock, regularly serviced by myself, in line with the field service manual, and only OEM parts and consumables used.
Oh and it is being mothballed at the end of the year, but I like my machines to work well!
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