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Author Topic: Kapex Motor Issue  (Read 2782 times)

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Offline BJM9818

  • Posts: 88
Kapex Motor Issue
« on: March 15, 2017, 10:08 PM »
What symptoms present themselves when the Kapex motor starts to fail. I have started to notice a little slowness in blade speed along with longer times to reach full blade speed.  This could be in my head but it's got me thinking.

Does the motor completely die at once or is it a slow painful death.

Saw is circa 2014 vintage.

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Offline Jim Green

  • Posts: 28
Re: Kapex Motor Issue
« Reply #1 on: March 15, 2017, 10:25 PM »
I think your kapex is about to fail. That's what happened the first time mine went down plus I heard almost like a crunching sound now and then. The other time it was a grinding noise and a poof of smoke, done. Sorry

Offline BJM9818

  • Posts: 88
Re: Kapex Motor Issue
« Reply #2 on: March 15, 2017, 10:34 PM »
It's been like that for a while but I haven't been using it as much recently. I guess I will just wait and see. New ones still have the same issue and motor?  I love the saw and have invested so much in 210mm saw blades if it dies I may just by another one.

Offline GarryMartin

  • Posts: 1579
Re: Kapex Motor Issue
« Reply #3 on: March 16, 2017, 05:43 AM »
The Kapex has a universal motor and so speed control is accomplished by reducing the voltage. If you are perceiving a slowness, it may be worth checking the voltage level on your circuit.
[NOTE: Tools from other manufacturers are of course available. As this is the Festool Owners Group, I tend to limit my advice to the tools that Festool sell, and assume that you've come to this site to get advice on Festool tools and because the level of skill and experience of the community here outstrips most you'll find elsewhere. If you *are* interested in tools from other manufacturers, please mention it in your post and also take the time to visit their user forums too.]

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Offline skids

  • Posts: 931
Re: Kapex Motor Issue
« Reply #4 on: March 25, 2017, 09:18 PM »
The Kapex has a universal motor and so speed control is accomplished by reducing the voltage. If you are perceiving a slowness, it may be worth checking the voltage level on your circuit.

This^^^

The Kapex is like two different saws from 15a to 20a circuit. Sometimes your stuck with a 15a, gotta do what you have to do. It's one of the only things I hate about the Kapex is how fickle it is about needing a 20a circuit.
The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's to late to stop reading it

Offline Samo

  • Posts: 521
Re: Kapex Motor Issue
« Reply #5 on: March 25, 2017, 09:37 PM »
Also, be aware that not all 20 Amp circuits are necessarily true 20 Amp.

We have been asked to work on jobs with temp power boxes that are crappily installed and existing older service panels that are dangerous. 

We will add a damages clause in the contract or not offer a contract at all.   [dead horse]

Best thing to do is, learn about power and how to measure it or stay away from quality power tools.  Yes, I've burnt a Kapex!
« Last Edit: March 25, 2017, 09:39 PM by Samo »

Offline glass1

  • Posts: 289
Re: Kapex Motor Issue
« Reply #6 on: March 25, 2017, 10:28 PM »
You do understand breakers do not limit power but cut power off when their respective amperage limit is reached,  a 15 amp breaker does not just limit the draw to 15 amps. So any appliance willnot be different on a 15 amp breaker or 20 amp breaker until it draws too much amps on the 15 amp and trips it.

Offline Bohdan

  • Posts: 719
Re: Kapex Motor Issue
« Reply #7 on: March 25, 2017, 10:41 PM »
But the smaller wiring to the smaller breaker may cause a larger voltage drop.

Offline Samo

  • Posts: 521
Re: Kapex Motor Issue
« Reply #8 on: March 25, 2017, 10:55 PM »
Measure a circuit under load!!!!

Offline Holmz

  • Posts: 3621
Re: Kapex Motor Issue
« Reply #9 on: March 26, 2017, 01:51 AM »
Measure a circuit under load!!!!

But then we cannot speculate...  [scared]

Offline glass1

  • Posts: 289
Re: Kapex Motor Issue
« Reply #10 on: March 26, 2017, 07:10 AM »
Watts = amps x  volts. So if the voltage drops the device will pull more amps. 

Offline glass1

  • Posts: 289
Re: Kapex Motor Issue
« Reply #11 on: March 26, 2017, 07:14 AM »
Voltage drop on 14 wire on 120 volts drawing a full 15 amps over 50 ft is less than 4 volts. Do not believe me, just do the research.

Offline Samo

  • Posts: 521
Re: Kapex Motor Issue
« Reply #12 on: March 26, 2017, 09:10 AM »
Measure a circuit under load!!!!

But then we cannot speculate...  [scared]

 [doh]

Offline Edward A Reno III

  • Posts: 3025
Re: Kapex Motor Issue
« Reply #13 on: March 26, 2017, 10:07 AM »
Lol. 


Measure a circuit under load!!!!

But then we cannot speculate...  [scared]
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Offline Cheese

  • Posts: 2996
Re: Kapex Motor Issue
« Reply #14 on: March 26, 2017, 11:19 AM »
But then we cannot speculate...  [scared]

 [thumbs up] [thumbs up]