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| How do I find the fault |
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| Lykle:
Hi All, I have an X2 mill with a variable speed motor. I was using it with a slitting saw. It was hard work for the mill as it does not have a lot of torque. The motor was getting quite hot. I was almost done when the motor stopped. Now if I apply power it hums and a few sparks fly between the brushes and the rotor. The brushes are more than long enough. The rotor will rotate freely without power, but with power you feel resistance. So now I am trying to figure out what the problem is. I opened up the motor and it looks ok, no molten wires or such. I had a look at the control unit, same thing there, no visible damage. So what do I replace? I can't figure it out. Any help out there? Thanks in advance Lykle |
| John Rudd:
Disconnect the motor from the control board first.....(make sure you unplug the mill from the mains please.... :zap:) Now take 100 watt light bulb and connect that to the control board(in place of the motor) Power up and see if the bulb lights up as you advance the pot.... If that works, you have a duff motor....sparks coming off the comm sounds like some of the windings have gone open circuit.....you could check with a Dvm on ohms range.... But try the bulb first and report back.... :thumbup: |
| tom osselton:
I had that happen (or similar) the motor got hot enough to melt the epoxy holding the brushes in place I epoxyed it back up and have hade no problem since. :doh: And if you ask the wife / gf to find the fault they point to us! |
| Lykle:
Hi Guys, Thanks for the comments. Did the bulb test and yes it shines. So the conclusion is that my motor is melted inside. This is what I expected. The pully is on so tight that I have been unable to remove the rotor for now. So that is the next step. I will see if I can get the motor rewired here, this feels like a country where they still rewire motors. Finding the right shop is the issue. Or else, I found a replacement part for 100 pounds UK. Shipping will be hefty, but now I have nothing, right? OK, Pully next and more reporting back to you. Thanks guys Lykle |
| John Rudd:
Use a hot air gun to warm the pulley then pull it off the motor shaft.... I'd guess that your motor is wound for 110v ac supply to your machine? Importing from the UK may not be the best thing....Where are you located? Ahh...I see, you're in Limassol.....I think the mains there is 230 v, so you should be ok importing a spare from the UK |
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