Mid volume bizhub heat rollers

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  • JR2ALTA
    Service Manager

    Site Contributor
    1,000+ Posts
    • Feb 2010
    • 2030

    #1

    [CQ] Mid volume bizhub heat rollers

    Is there a trick to reduce the center gouge that starts to appear after only a few dozen k prints?
  • blackcat4866
    Master Of The Obvious

    Site Contributor
    10,000+ Posts
    • Jul 2007
    • 22999

    #2
    Re: Mid volume bizhub heat rollers

    If you think of one I'd like to hear it. I've got a bunch of bizhub 423's that the heat roller never makes more than 240K (on a 480K yield fuser).
    There is a Chinese supplier of heat rollers, but to make it worthwhile you've got to make a minimum order of 50. Care to split the order?
    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

    • Hansoon
      Field Supervisor

      Site Contributor
      2,500+ Posts
      • Sep 2007
      • 3374

      #3
      Re: Mid volume bizhub heat rollers

      If this is the same issue as with the BH-350 B&W machines we cover the thermistors with thermistor tape. Before we push carefully the little thermistor "bulb", which protrudes out of the surrounding cushion, back with a wooden toothpick or match.

      Good results until now.

      Hans
      Attached Files
      “Sent from my Intel 80286 using MS-DOS 2.0”

      Comment

      • Hansoon
        Field Supervisor

        Site Contributor
        2,500+ Posts
        • Sep 2007
        • 3374

        #4
        Re: Mid volume bizhub heat rollers

        BTW, be careful with some of those Chinese UFR's. I got one type which didn't last more than 10K. The Teflon surface was not black or dark grey as usual but a rather light grey color. From the same manufacturer we got also UFR's for the Di-450/550 with exactly the same problem.

        It seems as if the Teflon was not hard enough to withstand the friction of thermistor and separator fingers.

        Hate to admit but had to go back to Katun for the moment.........

        Hans
        “Sent from my Intel 80286 using MS-DOS 2.0”

        Comment

        • blackcat4866
          Master Of The Obvious

          Site Contributor
          10,000+ Posts
          • Jul 2007
          • 22999

          #5
          Re: Mid volume bizhub heat rollers

          Originally posted by Hansoon
          BTW, be careful with some of those Chinese UFR's. I got one type which didn't last more than 10K. The Teflon surface was not black or dark grey as usual but a rather light grey color. From the same manufacturer we got also UFR's for the Di-450/550 with exactly the same problem.

          It seems as if the Teflon was not hard enough to withstand the friction of thermistor and separator fingers.

          Hate to admit but had to go back to Katun for the moment.........

          Hans
          Thanks for the warning Hans. Katun offers them? With good results? 240K ++?
          =^..^=
          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

          • Hansoon
            Field Supervisor

            Site Contributor
            2,500+ Posts
            • Sep 2007
            • 3374

            #6
            Re: Mid volume bizhub heat rollers

            Yes Cat, We are using Katun fuser rollers for the DI-Series and also the BH B&W machines. They are not worse than the OEM but cheaper.

            I'm getting regularly parts from China from aftermarket suppliers/manufacturers but one has to be very careful. Quality is not constant even when the same item is coming from the same manufacturer another time. Also their way of handling and the communication with them is not easy. Recently I got a bunch of parts very different from what I ordered. I had the feeling that they just threw parts in the boxes to complete the total quantity regardless of type and use of those parts.

            Hans
            “Sent from my Intel 80286 using MS-DOS 2.0”

            Comment

            • blackcat4866
              Master Of The Obvious

              Site Contributor
              10,000+ Posts
              • Jul 2007
              • 22999

              #7
              Re: Mid volume bizhub heat rollers

              I've got six fusers sitting in the graveyard with 240K. I'd be delighted to see those fusers reach life. Thanks again for the good advice. =^..^=
              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

              • JR2ALTA
                Service Manager

                Site Contributor
                1,000+ Posts
                • Feb 2010
                • 2030

                #8
                Re: Mid volume bizhub heat rollers

                After 200/250/350 I was shocked to STILL see this problem on the 223 series.

                Thanks all

                Comment

                • Hansoon
                  Field Supervisor

                  Site Contributor
                  2,500+ Posts
                  • Sep 2007
                  • 3374

                  #9
                  Re: Mid volume bizhub heat rollers

                  After 200/250/350 I was shocked to STILL see this problem on the 223 series.
                  Give the Thermistor Tape Method a try. Its worth it.

                  Don't forget to push the thermistor bulb carefully inside as much as possible.

                  Hans
                  “Sent from my Intel 80286 using MS-DOS 2.0”

                  Comment

                  • RRodgers
                    Service Manager

                    1,000+ Posts
                    • Jun 2009
                    • 1947

                    #10
                    Re: Mid volume bizhub heat rollers

                    Originally posted by Hansoon
                    If this is the same issue as with the BH-350 B&W machines we cover the thermistors with thermistor tape. Before we push carefully the little thermistor "bulb", which protrudes out of the surrounding cushion, back with a wooden toothpick or match.

                    Good results until now.

                    Hans
                    Thanks Hansoon
                    Color is not 4 times harder... it's 65,000 times harder. They call it "TECH MODE" for a reason. I have manual's and firmware for ya, course... you are going to have to earn it.

                    Comment

                    • ni311
                      Senior Tech

                      Site Contributor
                      500+ Posts
                      • May 2008
                      • 658

                      #11
                      Re: Mid volume bizhub heat rollers

                      Do you have a code to order the thermistor tape from KM?
                      Konica Minolta Error Codes - Explanations and Solutions

                      Comment

                      • Hansoon
                        Field Supervisor

                        Site Contributor
                        2,500+ Posts
                        • Sep 2007
                        • 3374

                        #12
                        Re: Mid volume bizhub heat rollers

                        Its not from KM. My buddy from the USA got it for me from Precision Roller.

                        I had to do one today so I made some pictures of the procedure.

                        Hans
                        Attached Files
                        “Sent from my Intel 80286 using MS-DOS 2.0”

                        Comment

                        • Hansoon
                          Field Supervisor

                          Site Contributor
                          2,500+ Posts
                          • Sep 2007
                          • 3374

                          #13
                          Re: Mid volume bizhub heat rollers

                          parts from China from aftermarket suppliers/manufacturers but one has to be very careful. Quality is not constant even when the same item is coming from the same manufacturer another time.
                          Here's an example. LFR for the Di-450 from China. Made 600 copies only then it disintegrated. The LFR bearings (OEM) where new ofcourse as well as the lower picker fingers so that could not be the cause of this damage. It seems that the silicone didn't bond to the metal core and became loose causing bubbles in the rubber which than tore because of the friction.

                          Hans
                          Attached Files
                          “Sent from my Intel 80286 using MS-DOS 2.0”

                          Comment

                          • Darren King
                            copiertech

                            500+ Posts
                            • Jul 2007
                            • 652

                            #14
                            Re: Mid volume bizhub heat rollers

                            A lot of the time trying to save ten bucks costs you 100 bucks in callbacks.

                            Comment

                            • Hansoon
                              Field Supervisor

                              Site Contributor
                              2,500+ Posts
                              • Sep 2007
                              • 3374

                              #15
                              Re: Mid volume bizhub heat rollers

                              A lot of the time trying to save ten bucks costs you 100 bucks in callbacks.
                              "Ten Bucks"????

                              LFR for the Di-450 from Katun costs USD 110.00 (OEM would be even more, you must know) The same roller from Chinaman USD 15.00

                              So if I need ten pieces I save USD 950.00.........

                              Darren, for a small company like ours this makes a very big difference. Usually most of the aftermarket parts work well but you have to know your partners overthere.

                              Hans
                              “Sent from my Intel 80286 using MS-DOS 2.0”

                              Comment

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