Heidelberg Qm 46-2 not eject plate

hi,
I have a problem with heidelberg qm46; the plate is not ejected and winds around the dampening rollers. Can anyone help me solve the problem? Thank you
Alessio

 

My QM46 showing error as in video attached. Did you face this type of error. It is showing like plate loading and unloading error blinking

 

Hi sandeep.
Sorry for my late answer , Check for any obstructions or issues with the plate loading mechanism. Ensure that plates are loaded correctly and that there are no jams or misalignments.
Examine the sensors responsible for detecting plate loading and unloading. These sensors might be dirty, misaligned, or faulty. Clean them and ensure they are in proper working condition.
Verify that the plate thickness setting is correct. Incorrect settings can trigger plate-related errors.
Ensure all electrical connections related to the plate loading mechanism are secure. Loose connections can cause communication errors.
Try resetting the press and power cycling the machine. This may clear temporary errors.
Good luck

 

There is a spring responsible for applying pressure of the the mounting /ejector wheels to the bearers, check the integrity of the spring and make sure its not broken, if it is, it will be a cheap fix. check the bearers and the wheels for cleanliness and that they spin freely as well. Spring location is gear side , open the plate guard its on the plate changing mechanism

 

I have the same problem . We have 2 QM 46 and they both have the same problem only on the top unit . I checked for the spring on the wheels and one is snapped off the other is good . What makes the wheels move into position , I always have to move it manually into position when mounting the plate. On removal it doesn't find the slot to remove and jams up . No one out here really specializes in QM 46 stuff , guy who did retired .

 

Is that spring on the ejector wheel bar or somewhere else ? Appreciate the reply ... Bill in Canada

 

Does it make a difference with poly or metal plates ? We switched to me etal a while ago. Not sure if it was working before with poly plates

 

Is that spring the only thing that applies pressure to the plate cylinder bearers ???

 

It used to move forward and backward when I rolled it with the crank , now it doesn't and the spring gap looks good .

 

The spring in the pic is the spring that provides pressure from the guide wheels to the bearer, in both directions. If the spring is in-tact, the entire guard rests on 2 allen bolts, which may be out of adjustment, lowering the guard allows more pressure to the wheels, but you only want just enough pressure to operate the mechanism.
Check air pressure , if it's too low it can cause a delay in ejecting , causing jams. Or check for air leaks in the pneumatic that operates the plate clamps, behind the large cover.
There are guide fingers that can get bent , these fingers are critical in guiding the plate for ejection and can cause jams if they get in the way instead of guiding the plate

 

Hi Sean...The guard you were talking about , I tried lowering the screws down half a turn and up half a turn to no avail . Should the bearer wheels on the ejector bar be turning while the press is running ? There is a bar that goes across the opening that when I push it down lightly one wheel starts turning but not the other one . The leaf spring clip looks good . It was working but I don't know if the other operator changed a setting ! Those fingers look good too . Changed both friction wheels. Right now the friction wheels on the guard are not turning while running , should they be in contact with the bearers and turning normally ? Adjust the allen screws to lower the guard till just contacting ? Appreciate your time my friend

 

Those wheels should not be turning at all when the press is idling. For both plate on and plate off, there are 2 sets of guide wheels that engage whether you are going forward,( plate on) or reverse,( plate off) make sure the mechanism ( the wheels ) will switch from one set to the other as these wheels are crucial for guiding the plate on or off

 

Solenoid activated ! I'll be back on Friday so I'll have another look at it then . Appreciate your time Sean