Heidelberg GTO 52 swing arm

[peheidelberg]

Hi there all does anyone have info on the GTo 52 swing arm I need to take it out and set the bar up but unsure how to do it hope someone can help me out

many thanks

 

[laurowu]

Hi there all does anyone have info on the GTo 52 swing arm I need to take it out and set the bar up but unsure how to do it hope someone can help me out

many thanks

Set can follower 27mm from shaft (69.013.010) by turning the stop screw.

Clamping grippers.

push clamping piece forward until the upper edge of the clamping piece aligns up exactly with the upper edge of the gripper. After all grippers are clamped in, check if the stop screw is still in contact with the stop. If not you pushed the clamping piece too far or you need to check your springs.

Adjust individual grippers.

Insert a .6mm shims between the stopscrew and stop. Set grippers.

Rod 42.022.130 controls the gripper opening going into the feed board. ( End position of swing arm is at 265)

Ecentric bolt 69.013.047/b controls the opening of the gripper going to the impression cylinder. ( Grippers open at 329)

If you need more info, just mail me at laurowu@yahoo.com...Good luck!!

 

[exheidmech]

I hope you know what you are getting in for here. Even some of the most experienced Heidelbergs wont work on GTO infeeds. Good luck

 

[peheidelberg]

thanks very much for the help laurowu i have emailled you asking you for the diagram of the proceedure hope you have it to email me

hi exheidmech i know i have only worked on the gto a few times and each time i have gone abit more grey but being on my own and working in south africa i just have to try and get on with it just hope im not digging a hole for myself and cant get out of it !!!

 

[exheidmech]

Just a few things you will need to do a swing gripper job. Degree wheel, post for degree wheel, zero gauge. Also, make sure you drill and pin the swing gripper before loosening the 3 10mm bolts on the swing arm. There are a few very precise adjustments that are next to impossible without a degree wheel. Many times the swing gripper does not need to be removed at all. Its not uncommon for the gripper operating lever to be bad and need replacing. Do you see rust coming out of the lever, or does the internal taper on the lever seem loose?

 

[exheidmech]

How many colors is your machine?

 

[Siggy]

We are having a similar problem with our GTO 52. Swing Arm to impression cylinder transfer seems to be out of sync. We have tried adjusting the swing arm grippers with some success,but different stock thickness are an issue. If there is a proper procedure for setting the swing arm grippers and timing, we would appreciate obtaining it. I would like to start by checking that they are set correctly and then see where that leads us. It may be that we have a timing issue, or a worn part.
Sheets are tearing if set too tight, miss-register if too loose. Front stop position increases the tearing or marking if they are set forward.

If there is a step by step manual available to follow, we would love to see one as opposed to uninformed trial and error.

Any help appreciated

 

[LLS northwest uk]

your playing with fire if you dont know what your doing with swing arm grippers you could end up smashing it up or snaping the opening lever off.
there are three things that normally go on a swing arm 1st the swing arm shaft bearings go on the two outer ends causing the shaft to wear out. This is the most common problem you will need to order a new shaft and bearings for this job and strip the swing arm completly down 2nd the camfollwer go's on the end this means you just replace it and 3rd the swing arm gripper sieze up due to ink build up. To be honest its not a hard job to do I have done one in and out in a couple of hours

 

[Siggy]

Right, That was why I was looking for some help from someone who knows the proper procedure. We do have some fairly capable people here and have performed some intricate repairs to our 40" six colour (SM102), but we had documentation.

Hoping someone can help us out a bit. I have been setting the individual swing grippers, but I think there must be a slight timing issue, as different gripper settings result in a variation between no gripper marks, moderate marks, and tearing the grip edge with 1/8 to 1/4" tears. Registration seems to go out when set with not gripper marks. I assume the marks/tears are a result of a timing issue between the swing and cylinder grippers, but as noted above, I am going on assumption, rather than knowing exactly how the system is supposed to be set up. I guess there could be a worn part, but was hoping to at least attempt to get the grippers properly set before delving much deeper.

 

[LLS northwest uk]

There is an ecentric stud located under the feeder on the drive side its a 17mm with a 2.5mm grub screw in it. its for the opening of the swing arm check thats not come loose first

 

[Siggy]

Thanks LLS

Will do. Is this bolt simply accessed from under the feeder, or is it between the frame and side cover?

 

[LLS northwest uk]

its located under the feed table right up in the top right hand corner connected to the swing arm opening cam

 

[Siggy]

Thanks LLS,

Thanks LLS
I found the 17mm eccentric and it is loose. I was short on time today, but did manage to locate it. I had a difficult time getting my arms squeezed between some of the shafts under the feeder and struggled to get a wrench on it, but I was able to see that it easily moves and how it affects the cam position. I will have to clean it up in the morning as the grub screw appears to be full of grease. Hope it is not missing altogether. I assume its job is to lock the eccentric in place. Do you have any words of widom as to how it should be set?
Any further advice would be most appreciated

Best Regards

 

[LLS northwest uk]

if you manualy wind a sheet into the feed at the point where it transfers to the impression cylinder then adjust the stud so that the swing arm completely lets go of the sheet. Then just move it back the other way slightly and lock up the grub screw it should be then not that far out of time thats the best advise i can give if your still having problems after this the swing arm will need to come out and the timing done on it. hope this helps

 

[Siggy]

Thanks Again...

That makes sense. I do not really want to take the swing arm out, so hope this will do it. Now to find a way to get access to it. I will post the results of my efforts.

For some reason, I can not sent PMs on this forum. Perhaps too new.

Your help is greatly appreciated.

 

[LLS northwest uk]

no worries if your stuggling to get your arm in take off the guard at the bottom of the feeder makes life a bit easier

 

[Siggy]

Managed to set the bolt. I had to remove the bracket for the swing arm stop screw setting to gain access to the grub screw. (I did not alter the setting, just bolted it back in place) After a somewhat educated guess at gripper timing between the swing arm and impression cylinder, we fed some stock and pulled a register test. It started out looking quite good, but then I noticed the sheet was starting to buckle just as it transferred to the swing arm. I assume the swing arm must be advanced a bit and gripping the sheet just before the side guide has finished pushing or perhaps before the front lays swing up. I checked to see if the eccentric had backed off and become loose again, but it is still tight. I will try an adjustment in the morning and attempt to retard the swing arm grippers slightly. The gripper marks are gone... no tearing, so that was reassuring. Ran out if time again, but hopefully we are on the right track. My only concern is that at first it was registering very well, then the buckling started after some minor position adjustments. Hope it is not a worn part that is creating an inconsistent setting. There is a slight jump in the eccentric as the cam follower comes around each time when the press is running, but it is not excessive. I just hope a slight adjustment will take care of it.

Thanks again for the assistance

 

[Siggy]

Thanks LLS.
Running smooth now with dead register, no gripper marks Your guidance was right on the mark
Best Regards
Wayne

 

[LLS northwest uk]

no problem Wayne I cut my teeth fixing gtos stripped my first one down when I was 11 . if you need any advise in the future just ask Cheers Martin

 

[alx]

please help. swing arm gripper adjustment.

some individual swing arm push back the paper before gripping.