How is the ductor oscillation on the Heidelberg SM 52 press driven?

[Deleted member 16349]

I have a mechanical question on how the ductor roller is oscillated. I hope someone can confirm the mechanical action.

On some presses, the ductor is moved with a spring towards the ink fountain roller and a cam moves it back to contact the roller train. A Komori press had this configuration.

I was told that on the SM 52, there was some kind of mechanical actuation of the ductor towards the ink fountain roller and maybe a spring return but the explanation was not too detailed.

Besides the mechanical action, I hope also someone can describe how the electrical signal is used to engage and disengage the ductor action.

Thanks for any comments.

 

[aqazi81]

Hi Erik,

Send me your email address at [email protected]. I'll send you some diagrams.

Regards

 

[aqazi81]

Ductor movement is controlled with a cam and cam lever at drive side.

 

[Deleted member 16349]

Ductor movement is controlled with a cam and cam lever at drive side.

Asif,

Thanks for the diagrams.

If I understand them properly, the cam action compresses the compression spring when the ductor goes to the position against the roller train.

When the cam goes to its low point, the compression spring moves the ductor to the ink fountain roller position.

I hope this is the case since it is safer because the cam is not forcing the movement to the ink fountain roller. Only the spring is.

 

[Deleted member 16349]

I have an additional question regarding the drive of the ductor on the SM 52 press.

On Asif's diagrams, there is a bar that goes across the press and this bar is rotated by the lever and cam action on the drive side. The bar then acts to move the ductor roller arms.

I have a specific questions about the bar.

Does anyone know if this bar is solid or is it a tube?

Also, does anyone know exactly what the diameter of this bar is?

Thanks again for any help on this.

Erik