Results 1 to 4 of 4

Thread: Nemox Lux smoking

  1. #1
    Member
    Join Date
    Dec 2006
    Posts
    57

    Nemox Lux smoking

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi all,

    Recently my 2 year old Nemox Lux started making a very high pitched sound, sort of like dry bits of metal scraping together. A few seconds later it started also making a low grumbling sort of sound like it was really struggling. It didnt stop turning or slow down, just changed the note it was making. It smelled a little like something had burnt out.

    I stopped using it immediately, then later took it apart and cleaned it. I couldnt find any bits of stone or metal, but I noticed that the cream-coloured grease that coats the plastic gears teeth seemed to be hardened. I cleaned out all the grease and put it all back together without any grease. I put some sewing machine oil on the shafts and where they sat in the bearings, but left the plastic gear + worm drive gear without any grease (really needed coffee, didnt have grease, was scheduled for a date with coffeeparts). No more high pitched metal-on-metal scraping sound, but the low-pitched grumbling note was still there.

    It worked fine for a couple of days - maybe only 10 shots worth. This morning when grinding 2 shots worth it slowed down all of a sudden, and I noticed some smoke rising out of it somewhere :( It had the same sort of burnt-out smell I noticed earlier. I finally got some food grade grease from coffeeparts and lubed up the gear/worm gear, really just hoping that was the problem (knowing it probably wasnt). Now it runs just the same, still making the low-pitched grumbling sort of sound and sometimes slowing down a bit. :-[

    Does anybody know exactly which bits in the lux motor/gear assembly are supposed to be lubed, and with exactly what kind of lube? ATM I just have food grade grease and some sewing machine oil. The commutator/brush parts of the assembly are totally dry, so Im not sure if that is supposed to be lubed. The big bit above the commutator (the armature?) is also totally dry. There are also spacers at the top and bottom of the spinning shaft, so Im hoping these are the smoking bits, not the metal parts! Also the commutator has a black powdery coating all around it. Theres also a light covering of black/grey sooty stuff splattered around in various places around the armature.

    Thanks in advance for any help!

    -Paul

  2. #2
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    16,878

    Re: Nemox Lux smoking

    Gday l-b-l,

    From your description Id say the motor on your Lux is very close to catching fire and if it was me, I wouldnt be using it any more. Take it to your closest reputable specialist coffee service agent and see if they can have the motor repaired for you, or at least give you a quote as it may not be worth repairing with the cost of labour so high these days.

    If you live close to a Trade TAFE College, you might be able to convince the Electrical Trade Instructor(s) to let the Motor Winding Apprentices have a go at fixing it for you as part of a practical training exercise. This can sometimes be a less expensive option than going to an experienced repairer. Anyway, the crux is that the motor is not long for this world so its either going to have to be repaired or scrapped.

    With small grinders like the Lux, this scenario is always close to hand because the small motors driving the gearboxes in these machines are not rated for very long operation.... Maybe 30 seconds On then 60 seconds Off or somewhere in this neighbourhood. They are really only designed to grind a single espresso at a time, cool down for a while then ready to grind another single espresso. Theyre not up to grinding say 250g of coffee at a time to fill up bags for friends and relos.... You need a substantial grinder for this sort of duty.

    All the best mate and I hope you can get it repaired economically,

    Cheers,
    Mal.

  3. #3
    Member
    Join Date
    Dec 2006
    Posts
    57

    Re: Nemox Lux smoking

    Thanks Mal. I borrowed my Dads spare KG100 for the time being.

    While testing it I managed to touch the point where 2 brown wires meet at a tiny switch (activated by the grind setting being in the usable range). I got a big shock, my arms tensed up and I shouted "argh" involuntarily and jumped back. I think I was lucky to be wearing rubber thongs and off-balance when I touched it (Id just crouched down to check the angle of grinds exiting the chute). What a stupid thing to do.

    :o

    Take care people.

    -Paul

  4. #4
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    16,878

    Re: Nemox Lux smoking

    Quote Originally Posted by leebroozlee link=1193667530/0#2 date=1193751459
    While testing it I managed to touch the point where 2 brown wires meet at a tiny switch (activated by the grind setting being in the usable range). I got a big shock, my arms tensed up and I shouted "argh" involuntarily and jumped back. I think I was lucky to be wearing rubber thongs and off-balance when I touched it (Id just crouched down to check the angle of grinds exiting the chute). What a stupid thing to do.

    :o

    Take care people.

    -Paul
    Geez mate..... Take care indeed :o, we dont want to lose any of our members to this kind of scenario, 240V AC can and does kill people. Please be very, very careful about this sort of work and preferably let someone who is both qualified and licensed tackle anything with wires operating at these sorts of voltages.

    Take care,
    Mal.



Similar Threads

  1. Smoking Cane Toads
    By CafeLotta in forum Off Topic
    Replies: 9
    Last Post: 3rd September 2013, 12:02 PM
  2. Looking for a Nemox
    By Rob_Knob in forum Brewing Equipment - Midrange ($500-$1500)
    Replies: 2
    Last Post: 18th July 2009, 11:35 PM
  3. Who has a Nemox Lux?
    By CS in forum Grinders
    Replies: 36
    Last Post: 12th April 2007, 12:55 PM
  4. Smoking Snobs?
    By Stoveboy in forum General Coffee Related...
    Replies: 32
    Last Post: 14th March 2007, 12:03 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •