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  1. #1
    Hi folks I have finally got my spindle up and running, I have read on this forum that they will run no problems for about an hour without heating up. I have run mine and it starts to heat up after about five mins, i switched it off straight for fear of ruining it, im just wondering have i done something wrong to cause this or should i just wait until my pump comes before using it.
    Thanks folks for the help.

  2. #2
    Does it run "hot", or "warm. Warm is ok, but burny is bad. G.

  3. #3
    Turned it of soon as started to heat didnt want to take a chance.

  4. #4
    Quote Originally Posted by Tomnewry View Post
    im just wondering have i done something wrong to cause this or should i just wait until my pump comes before using it.
    Excuse me
    You mean you start using the water cooled spindle WITHOUT a pump?

    I am not expert about cnc and spindles but i think every kind of water cooled machine needs a pump in order to work properly. So my advise is dont even start it again without a pump
    Last edited by ba99297; 19-12-2013 at 10:51 PM.

  5. #5
    As I have said before, I have been using a wc spindle for over 10 years, sometimes for prolonged periods. I run this spindle without water and it never gets hotter than hand warm.
    My spindle is not Chinese, but was made in Germany by Jaeger back in 1985. I did discuss water cooling with a spindle recon company, and their comment was that if the spindle was only was warm no harm was likely to occur. G.

  6. #6
    As i am not an expert, and my English are not very good i will suggest you check
    1. The bearings
    2. Try to blow or suck from the inlet or outlet tube of the cooling system. If no air can pass through try to clean it because that means that even the air cant pass trough the cooling system in order to spread heat of the spindle to the environment
    3. One basic question (because you don’t mention it) is if you use the spindle to cut something or you just turn it on with no cutting load. If you use it to cut any material check the bit condition
    4. If you use a VFD (inverter) in order to control spindle speed, try to check it. May be bad electrical parameters cause overheating

    I can think of something else


  7. #7
    There's also a startup regime to protect the bearings, for my spindle this is;

    4 minutes at 25% max speed
    3 minutes at 50% max speed
    3 minutes at 75% max speed
    2 minutes at max speed
    until the spindle reaches 35 deg.C

    This is not a Chinese water cooled spindle it's an air cooled Italian spindle but as it's to do with the bearings it should apply to all spindles that run above 3000 rpm (so the manual says)

    The routine shoild be carried out each time you start it up at the beginning of the day or if it cools to room temperature.
    I wrote some simple G code and called it 'spindle_warmup', it goes through the routine above.
    Last edited by EddyCurrent; 20-12-2013 at 09:35 AM.

  8. #8
    I seem to remember reading on ARc's page that the spindles should be run in for some time to protect the bearings.


    ARc also says you should run the spindle for 30 mins each month to keep the bearings good!
    Last edited by ptjw7uk; 20-12-2013 at 01:26 PM. Reason: added note

  9. #9
    Neale's Avatar
    Lives in Plymouth, United Kingdom. Last Activity: 11 Hours Ago Has been a member for 5-6 years. Has a total post count of 1,133. Received thanks 201 times, giving thanks to others 5 times.
    I found that I could run my 2.2kW spindle uncooled at about half-speed and light cuts for about 15-20 mins before it became hot enough that I was unhappy to continue - at that point it was still just cool enough to touch but probably somewhat warmer inside. I use a cheap caravan water pump that cost about 12 from eBay (and I'm sure that everyone else can buy them for less - story of my life...) and with a few metres of plastic pipe and a bucket, it makes a very effective cooling system. The pump instructions say do not run for more then 15mins continuously; because my control box includes an old PC power supply I have both 5V and 12V available. I fitted a two-way centre-off switch so that I can give a quick blast of 12V to purge odd air bubbles, and then go to 5V and it seems to be happy to run for hours like that.
    Last edited by Neale; 20-12-2013 at 10:41 AM.

  10. #10
    My spindle will happily run for over an hour before getting slightly above luke warm and thats cutting not just spinning. That said I don't run it without water but in the past I have had too when the pumps broke etc so if yours is getting hot then somethings definately wrong.? If it's getting above warm in just a few minutes then I suggest something is wrong. Check the VFD settings to make sure the Amps or volts are correct.

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