Jura ENA Micro 9 - Loud noise, sounds like gears grinding

    • Jura ENA Micro 9 - Loud noise, sounds like gears grinding

      Hersteller: Jura | Typ-/Modell: ENA Micro 9 | ca. Baujahr: 2020

      Hello

      Trying to figure out what is the problem with my ENA Micro 9. The machine is making a loud noise and it sounds like gears grinding. After powering up the machine, I can hear the brew group going through a position cycle and eventually the gears start grinding. The display only reads Heating and so I turned the machine off to hopefully not ruin the gears. I removed the brew group and noticed the gears were worn so i replaced the brew group with a new one. The machine still has the same issue. Any thoughts as to what the problem is, thanks. I have never had this issue with my other two Jura machines, so this is interesting to me.

      Mechanische Kenntnisse vorhanden: NEIN | Elektrische Kentnisse vorhanden: NEIN | Messgerät vorhanden: NEIN

    • Hello

      If the drive slips at the end of the movement and the gears skip, it is usually because one of the motor's fastening eyes is broken or the motor housing is no longer in good condition. If the brewing unit runs smoothly (sluggishness is one of the reasons why the motor breaks) replacing the drive motor should solve the problem.

      BS
      Immer logisch und Schritt für Schritt vorgehen. Blinder Aktionismus kostet Zeit und Geld.
      Küche: Jura GIGA 5 Pianoblack-Chrom Bj: 2012
      Büro: [sJura GIGA X3 ALU Bj: 2014

    • I removed the motor and noticed the motors fastening eyes were both intact and the motor housing was in good shape as well.
      I installed the motor from my ENA Micro 1 (but I used the old encoder from the ENA Micro 9) into the machine and everything worked perfectly.
      Thank you for the advice and saving me from throwing parts at the machine.
      Does your store ship to the US? I would prefer spending my money with you because of your help.
      Thanks again :thumbsup:

    • Hello.

      For some reason the housings of the drives become "soft" and the gear jumps because it no longer has a proper friction connection.
      You can try to file down the plastic support of the fastening eyelets some tenths of a millimeter from below and also to file down the brass bushings from below in the round area. With a bit of luck, the device will then work again for a while. I mean from the direction of picture 6:
      komtra.de/jura-ersatzteile/jur…ra-ena-micro-a-serie.html

      For stability of the fastening eyelets, however, it would be better to try to work on the aluminum plate to which the motor is screwed so that the gears slide a little closer together. But if that doesn't work, you not only have to replace the motor, but also the support plate.
      komtra.de/jura-ersatzteile/jur…-kaffeevollautomaten.html

      We here in the forum have nothing to do with the shop, so I can't say whether shipping to the USA is possible. You would have to request this from the shop.

      BS
      Immer logisch und Schritt für Schritt vorgehen. Blinder Aktionismus kostet Zeit und Geld.
      Küche: Jura GIGA 5 Pianoblack-Chrom Bj: 2012
      Büro: [sJura GIGA X3 ALU Bj: 2014

    • Hello

      Thanks for the advice, my original plan was to just order a new motor to replace the original one.

      I did some research online and found someone who 3D printed an arch retaining bracket to strengthen the mount of how the motor is attached to the plate. Luckily, I have a 3D printer and will make a batch of them this weekend to see if that will solve the issue.

    • This is the first place I saw the retaining bracket, new-kaffeevollautomaten.de/eng…9AbpLNLquC44x21NIjZ1HA4lj

      Forgive me if i misunderstood what this bracket has the ability to do, I assumed it would help correct the issue. I have owned Jura machines for over 10 years and only ever had to remove the brew groups to clean and replace o rings, so this is new territory for me. I am experienced with cars but have limited knowledge of small appliances, so I understand my limitations.

      The 3D print is from here, tinkercad.com/things/j8vPfOif6…ur-jura-getriebemotor-e70

      And again, if I am assuming wrongly that this will help with my issue, I apologize for that error.

    • That design is completely crap in my opinion and also this shop is known for selling some shady stuff.

      Also, I don't think this will address your issue as it seems the lugs on your motor housing are intact.

      Instead, I would recommend focusing on the steps BlackSheep mentioned above.

      But please do a thorough inspection of the motor housing lugs first to confirm there is indeed no crack.
      Kontakt: sb_NUE ät stephanb.net

    • Thanks for the advice!

      Everything looked okay to me and the motor from the ENA 1 has no issues in the ENA 9 machine.

      I ordered a new motor so I will be able to compare it with the old one eventually.

      Nothing stood out to me as being obvious other than those brass washers seemed loose. The motor housing looked good.

      I’ll try to add some photos

    • Here are some photos
      Bilder

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    • Hello.

      The problem is more that the shaft with the pinion has too much radial play. I can't imagine that the windy mount can solve the problem in the long term.
      Excessive radial play can come from worn bearing bushings or if the "tower" that holds the bearings has cracks on the "bottom" or in the shaft. I've had that before - but it's hard to see with the black plastic.
      Therefore, given the current state of knowledge (without using new parts), I see no other option than to reduce the radial play by bringing the pinion and the gear rod closer together so that excessive radial play cannot have a negative effect on the adhesion.
      Please also note that if the gear rod of the brewing unit is already broken in the lower area, the problem can recur very quickly. Then it may be better to rotate it so that the defective part is on top.

      BS
      Immer logisch und Schritt für Schritt vorgehen. Blinder Aktionismus kostet Zeit und Geld.
      Küche: Jura GIGA 5 Pianoblack-Chrom Bj: 2012
      Büro: [sJura GIGA X3 ALU Bj: 2014

    • Hello

      Thank you again for the information!
      I have a general idea of what you are saying and am in the process of searching for a schematic for the brew group so I will properly understand the terminology. It makes complete sense to what you are saying and what was occurring to the machine.

      Here is a photo of the only damage I could see
      Bilder

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    • I added the Micro 9 motor to Micro 1 machine and it worked perfectly.

      So both machines are working perfect, very strange.

      I do remember when I originally removed the motor from the Micro 9, there was some movement of the motor on the housing like the screws were not tightened properly and caused the motor not to be secured.

      I’m going to run coffee on both machines for a few days and give an update.
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