Help! SM52 front/side lays faulty

[1roy]

I have intermittent but ongoing probs with driveside front lay movement: sometimes when moving the lay in or out it doesnt reach target grip measure and keeps flashing on console, then moves to max grip on the one side(10mm) so well skewiff. Heidelberg uk not fathomed it yet, replaced or swapped most relevant servos/boards, greased everything . . . no joy.
Occasionally this happens when booting up, too: ds front lay flashing, clears after maybe 2 or 3 reboots.
Also, sometimes the ds sidelay refuses to move when turning a sheet and swapping lay edge. Can be cleared by swapping at console twice, then its ok.
Anyone else had this bug, or any idea whats wrong? Thanks
Press is 2001 SM524-E cptronic in London

 

[Mechanic]

I 'm sorry to disapoint you, but there was a machine in cyprus with the very same problem. The specialists changed everything except the actual front lay. Servomotors, cables, boards , even replaced the plug pins with golden pins! No luck....And I cannot blame the power supply (engald and cyprus run on 3x415 V, the rest of europe on 3x400 V) cuz right next to the SM 52 is another SM 52 runing with no problems

 

[Paultheprinter]

hi there,

seen it too on a 2col sm52 had to go through reset procedure e.g min size max size then min then actual size. Heidelberg electrics ? need i say more. also happening on my 5col 74 at mo


paul

 

[1roy]

I 'm sorry to disapoint you, but there was a machine in cyprus with the very same problem. The specialists changed everything except the actual front lay. Servomotors, cables, boards , even replaced the plug pins with golden pins! No luck....And I cannot blame the power supply (engald and cyprus run on 3x415 V, the rest of europe on 3x400 V) cuz right next to the SM 52 is another SM 52 runing with no problems

By the 'very same problem' do you mean you had the sidelay and frontlay bugs? Did the problem get sorted? Was there any connection between the front and sidelay probs? Heidelberg have replaced servo motor, swapped boards . . .

seen it too on a 2col sm52 had to go through reset procedure e.g min size max size then min then actual size. Heidelberg electrics ? need i say more. also happening on my 5col 74 at mo


paul

Paul, is that the sidelay not homing, or the frontlay rebelling, or both? My reset for the sidelay is simpler, I'm glad to say, and as far as I can remember, always works. Frontlay is the bugger, as just inputting a few microns' movement can send it out to 10mm grip without warning, as I have found on one critical job and a few where it was still finishable by cronked guillotining . . . maybe I should just print all at 10mm and reset grip margin on platemaker . . .

 

[terrynak]

SM52 side guide.

SM52 side guide.

Had trouble with G.S. side guide not moving at all a few times (up to 10 times?). Ours is a 3 year old 4color model. Usually we just turn off and on the press to reset it a couple of times. I think Heidelberg changed the motor last year but it happened again a couple of times this year and we just reset the press but rebooting it.

 

[1roy]

New servo on the gearside front lay seems to have sorted this, including the wilful sidelay! I wonder how and why?

 

[mrheidelberg]

New servo on the gearside front lay seems to have sorted this, including the wilful sidelay! I wonder how and why?

Thought you said in your first post that Heidelberg UK had already swapped the servos, or did they just miss the important one !!

 

[1roy]

Heidelberg replaced the servo about 5 years ago, and that was fine for the front lay for some time. Perhaps there's a bad batch of servos or something else was causing it to fail, and perhaps the new one will fail in a few years . . . the most curious issue now for me is why is the sidelay behaving? From being a regular, almost daily failure to go to position, there has not been one instance since replacing the front lay servo!