SM 102 10P register movement

Has anyone that runs a SM 102 experienced register movement on these machines? The movement is mostly horizontally and diagonally. The press is a 2008 and we have had it since new.

 

Is it sheet register, or distortion? If diagonally, it may be a different issue.
Assuming you have marks on your sheet edge, are they bouncing?

 

No, it is unit to unit register on the move all day long. We can get up to 0.01mm move it back in and then another colour will move out or after a while the same unit will move again.

 

So you must be getting doubling/slurring too I imagine. It sounds like a transfer gripper problem, of could be thrust bearings if it is lateral. If no slurring, maybe your cpc is letting the cylinders wander in and out a bit.

Sorry, I am not a mechanic, but we did replace some thrust bearings some years back when a similar sounding issue arose.

It may be a good idea to post what the sheets are printing like... just out of position, or print quality issues too

 

send your circumferential motors up to the max both ways a few times and grease the grease point plate cylinder gear in the oven door on the drive side they might be sticking

 

Tomatron
Had a couple of heidies have that, a unit would move only when selected. It was a bad button.
FSA

 

its is a 2008 sm 102 they have a 2000 cpc so its all touch screen

 

Mainly the potentiometers which are connected to the gear of register motors are losing their sensitivity after a certain time. If the problem is on only one unit, you have to replace the related potentiometer. You have to ask an engineer to do it.

 

Yes, have some massive slurring/doubling especially on unit 1 and 6 when perfecting 4/4 or 5/5 We run blacks in 1 and 6.

 

Tomatron, If the problem was at the plate cylinder gear, you would not see slurring or doubling. If it was thrust bearings, you would only see straight lateral movement. If this is only seen when perfecting, I would first check to see if you have a vacuum leak, causing loss of suction at the sucker bars.

 

Tomatron
Sorry I missed that it is a 2008, anyways the 8c had slur and movement on unit 7, and for months I said there is a gripper problem or cam follower. The suits dismissed my opioin for months and let Heidelberg soak them for all kind of things but the problem was still there. Finally the camfollower was looked at and it was the problem, it was bent and therefore the paper was slipping in the grippers. Pretty simple fix, for such a big problem that took almost 2 year to pin point. Why was it bend? I think it was the day shift guy and his friend the big hammer when he jammed the press running card stock. If it is the potentiometers, you should see them moving with the side door open when the press is running on units 1 or 6. Good hunting, and keep us posted to what you find.
FSA

 

For FSA. Register movement

Hello,

We have same problem with SM 102 8 colour made 2012 register movement after 1000 sheets run diagonally on unit number 3. and 7.

We do not understand where is the problem it is a new machine !

Thanks.

 

Hello
The most common problems are diagonal geared motors which are located at the operator side of each printing unit. If you can, disconnect the cable of the motor after the printing job is adjusted. If the registers of the suspected printing units are standstill, then the motors are defective.

Good luck.