PRESS 6120, warped drum claw assembly

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  • blackcat4866
    Master Of The Obvious

    Site Contributor
    10,000+ Posts
    • Jul 2007
    • 22703
    #1

    PRESS 6120, warped drum claw assembly

    I know, I know ... I should have taken a picture. The little support hook at the front snapped off. The drum claw assy is supposed to cam gradually front to back, but does not.

    On the PM I noticed a distinct drum claw ring on the drum. The drum claw assy could not slide front to rear. The front hole had sagged 1mm and swelled around the shoulder screw. This machine ordinarily does 300K per month, but lately the volume has dropped off. I'm wondering if the machines internal temperatures are rising during idle.

    I was able to re-shape the plastic with heat and a little filing, to make the drum claw unit oscillate properly. I am just concerned about obvious effects of high internal temperatures. The drum claws are not very far from the fuser. Maybe obstructed fans?

    Has anybody seen this? =^..^=
    If you'd like a serious answer to your request:
    1) demonstrate that you've read the manual
    2) demonstrate that you made some attempt to fix it.
    3) if you're going to ask about jams include the jam code.
    4) if you're going to ask about an error code include the error code.
    5) You are the person onsite. Only you can make observations.

    blackcat: Master Of The Obvious =^..^=
    Tags: assy, claw, drum, front, internal
    • BillyCarpenter
      Field Supervisor

      Site Contributor
      VIP Subscriber
      10,000+ Posts
      • Aug 2020
      • 14766
      #2
      Re: PRESS 6120, warped drum claw assembly

      The fans and ducts would be my first suspicion. How old is the plastic part that was affected by heat? Over time plastic ages/dries out and becomes more susceptible to heat. Is it possible it's just time to replace with new?
      Adversity temporarily visits a strong man but stays with the weak for a lifetime.

        Comment

        • blackcat4866
          Master Of The Obvious

          Site Contributor
          10,000+ Posts
          • Jul 2007
          • 22703
          #3
          Re: PRESS 6120, warped drum claw assembly

          Originally posted by BillyCarpenter
          The fans and ducts would be my first suspicion. How old is the plastic part that was affected by heat? Over time plastic ages/dries out and becomes more susceptible to heat. Is it possible it's just time to replace with new?
          I hope not. It's only 9 months old. I've seen very similar drum claw guides on 1052 with 15M prints and 5 years.
          If you'd like a serious answer to your request:
          1) demonstrate that you've read the manual
          2) demonstrate that you made some attempt to fix it.
          3) if you're going to ask about jams include the jam code.
          4) if you're going to ask about an error code include the error code.
          5) You are the person onsite. Only you can make observations.

          blackcat: Master Of The Obvious =^..^=

            Comment

            • wjurls
              Trusted Tech

              Site Contributor
              250+ Posts
              • Feb 2017
              • 461
              #4
              Re: PRESS 6120, warped drum claw assembly

              Plugged up ozone filters?

                Comment

                • allan
                  RTFM!!

                  5,000+ Posts
                  • Apr 2010
                  • 5445
                  #5
                  Re: PRESS 6120, warped drum claw assembly

                  a Bad thermistor could lead to higher temp than what it reads? Gee that part should not get that hot and sure if it stays this way that issue would only be the fisrt problem it creates. Have not seen that section get that hot.

                  The air duct for the belt cleaning unit gets lost. But sure that would not happen on your machines. Anyway don't think that would affect that.

                  Set Low Power and Auto shutdown to 1min?
                  Whatever

                    Comment

                    • blackcat4866
                      Master Of The Obvious

                      Site Contributor
                      10,000+ Posts
                      • Jul 2007
                      • 22703
                      #6
                      Re: PRESS 6120, warped drum claw assembly

                      Originally posted by allan
                      a Bad thermistor could lead to higher temp than what it reads? Gee that part should not get that hot and sure if it stays this way that issue would only be the fisrt problem it creates. Have not seen that section get that hot.

                      The air duct for the belt cleaning unit gets lost. But sure that would not happen on your machines. Anyway don't think that would affect that.

                      Set Low Power and Auto shutdown to 1min?
                      I thought about that, but there are some drawbacks. This machine has a 15 minute initial warmup from cold. Probably less from sleep mode, but still 5+ minutes. My keyop would have to be very patient.

                      The thermistors were not significantly worn ... I was in there rebuilding the fuser. I checked for blunted fuser claws, but nothing like that.

                      I'm going to investigate to see if is any way to run more of the fans during idle. =^..^=
                      If you'd like a serious answer to your request:
                      1) demonstrate that you've read the manual
                      2) demonstrate that you made some attempt to fix it.
                      3) if you're going to ask about jams include the jam code.
                      4) if you're going to ask about an error code include the error code.
                      5) You are the person onsite. Only you can make observations.

                      blackcat: Master Of The Obvious =^..^=

                        Comment

                        • allan
                          RTFM!!

                          5,000+ Posts
                          • Apr 2010
                          • 5445
                          #7
                          Re: PRESS 6120, warped drum claw assembly

                          For some sort of reference you can check the drum temp senor value against another machine.
                          Strange problem you have there.
                          Whatever

                            Comment

                            • blackcat4866
                              Master Of The Obvious

                              Site Contributor
                              10,000+ Posts
                              • Jul 2007
                              • 22703
                              #8
                              Re: PRESS 6120, warped drum claw assembly

                              Thanks for your thoughts. =^..^=
                              If you'd like a serious answer to your request:
                              1) demonstrate that you've read the manual
                              2) demonstrate that you made some attempt to fix it.
                              3) if you're going to ask about jams include the jam code.
                              4) if you're going to ask about an error code include the error code.
                              5) You are the person onsite. Only you can make observations.

                              blackcat: Master Of The Obvious =^..^=

                                Comment

                                • blackcat4866
                                  Master Of The Obvious

                                  Site Contributor
                                  10,000+ Posts
                                  • Jul 2007
                                  • 22703
                                  #9
                                  Re: PRESS 6120, warped drum claw assembly

                                  I have a little more information:

                                  Firstly, it's exactly the same drum claw assembly used on the PRESS 1052/1250P.

                                  Secondly, cooling fan/1 FM1 & cooling fan/2 FM2 are the two fans most closely involved in cooling the fuser and photoconductor areas. FM1 cools the fuser, runs at low speed during standby and low power mode, high speed during warmup and printing, & low speed during idle. FM2 cools the photoconductor area, OFF during standby and low power mode, high speed during warmup and printing, and stay at high speed a few minutes after printing, then OFF at idle.

                                  I checked the service manual and DIPSW settings for possible changes to fan cycles or fan speeds: nothing found yet.

                                  I haven't had an opportunity to investigate fan, ducts, and filters yet. I can be pretty certain that FM1 is at least running. It would throw a C5363 or a C5364. A stopped fan will flip DIPSW42-2 for wrong speed measured during high speed mode, and DIPSW42-3 for wrong speed read during low speed mode, and error out the machine. There is also ICP11 on the PRCB which would blow for an overcurrent, and error out the machine. On the other hand, for FM2 there does not seem to be a specific DIPSW, or ICP, but there is errors C5366 or C5367.

                                  More to come. =^..^=
                                  If you'd like a serious answer to your request:
                                  1) demonstrate that you've read the manual
                                  2) demonstrate that you made some attempt to fix it.
                                  3) if you're going to ask about jams include the jam code.
                                  4) if you're going to ask about an error code include the error code.
                                  5) You are the person onsite. Only you can make observations.

                                  blackcat: Master Of The Obvious =^..^=

                                    Comment

                                    • blackcat4866
                                      Master Of The Obvious

                                      Site Contributor
                                      10,000+ Posts
                                      • Jul 2007
                                      • 22703
                                      #10
                                      Re: PRESS 6120, warped drum claw assembly

                                      5M copies later: no re-occurrence. My MacGuyvered drum claw assembly is working just fine, with no additional heat deformation. Whatever occurred before has not repeated. =^..^=
                                      If you'd like a serious answer to your request:
                                      1) demonstrate that you've read the manual
                                      2) demonstrate that you made some attempt to fix it.
                                      3) if you're going to ask about jams include the jam code.
                                      4) if you're going to ask about an error code include the error code.
                                      5) You are the person onsite. Only you can make observations.

                                      blackcat: Master Of The Obvious =^..^=

                                        Comment

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