Manroland 200 impression timing problem

I'm faceing a problem of impression engage/disengage timing. When paper is fed, the impression is engaged and the impression cylinder is imaged about 14" from gripper (6-7 in at tail side) before paper enters into cylinder so, the backside of paper is imaged also (about 7inch from tail side). Disengage of impression is ok. When changing the timing cam of impression on/off, the time of engaging is changed accordingly. If moved backward, the imprision On time will be correct but disengaging time will be incorrect, means the impression will release after 6/7 inches from gripper side. The impression engaging time is more than 1 revolution so the problem is occuring. Cam followers and Cam is ok.
Please advice.
Attached is Cam image

 

The eccentrics have a fixed position. Never move them from there.
Your problem is in the positioner. Fix its spring or roller.

 

Where is this Positioner, positioned?

 

I remember having this issue we resolved by adding brake we got from man Roland easy to install operator side.ibelieve top plate cylinder see druckman drawings

 

regulates the print start sensor

 

Dear Sir i do not have druckman drawing

 

Linus got back and look at posts from the other members you will see druckmans post

 

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Hello Sir, where is Positioner in the machine, is it behind the Camfollower arm or at side of blanket cylinder Operator side?

 

Thanks all, i found the Positioner. Will adjust and let you guys know.

 

Dear Sir, i adjusted the impression off screw (clockwise) but it would block the movement of lever/Cam and machine would jam. If i didn't stop and rotate the machine, some parts will break.

 

Dо'n adjust in free position.
Remove the positioner, disassemble it and see if the spring is o.k. Check if the bearing is not broken. It must be adjusted at the top of the eccentric.

 

I removed the positioner and checked, its ok (spring and roller). Adujusted both screws at the top of the ecentric but the problem is not solved. Any help?

 

I have already resolved this problem of delay in disengagement at the level of the pressure coil (there is a spring plate that can be replaced, compared to the cams and cam roller if I remember correctly there is an eccentric on the cam roller and this is where I had the possibility of adjusting the engagement time if the roller is defective you can recover the clearance, remove the cam which comes into contact with the two rollers and you will clearly see the location of the pressure roller and the eccentric also you decide if you have a worn cam roller

 

It's been too long since I worked on the Roland.

 

Camfollower has 3 stages.
1: no pressure
2: pressure plate-rubber
3: pressure plate-rubber-impression
The positioner should prevent the 3rd position from being engaged earlier (Your problem). Also hold the 1st and 3rd positions.

 

Thanks Adil. please guide me where is the pressure coil. Is it the solenoid ? I had already adjusted the eccentric on the upper Cam follower roller but it didnt help.
Cam follower rollers are fine.

 

Hi sir
Remove for me this carter to remember a little ,
If I remember correctly I remove a cam to have access to the small roller and the coil
Please remove and give me picture

 

It is also possible that the problem is in the cable that powers the electromagnet. It has happened many times.
Turn on the pressure and move the cable. You will understand if the problem is there. If it is there, pull the cable and cut off the damaged part. There is an advance.