Omega Owners Forum

Please login or register.

Login with username, password and session length
Advanced search  

News:

Search the maintenance guides for answers to 99.999% of Omega questions

Pages: 1 [2] 3  All   Go Down

Author Topic: my dead polisher  (Read 2748 times)

0 Members and 1 Guest are viewing this topic.

Andy B

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Bury Lancs
  • Posts: 39810
    • ML350 TDM SmartRoadster
    • View Profile
Re: my dead polisher
« Reply #15 on: 04 August 2009, 18:24:44 »
Quote
As another comment, these items often fail with a short circuit diode which takes out the fuse in a very dramatic fasion!

 ......!

It did!  :o
 There were just the ends of the fuse left in the holder and blits of glass everywhere1  ;D  ;D  ;D
Logged

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34046
  • Git!
    • View Profile
Re: my dead polisher
« Reply #16 on: 04 August 2009, 18:26:28 »
Well if you do a resistance measurment on the part you will find 2 pins shorted together and the rest displaying typical forward and reverse bias diode behaviour
Logged

Andy B

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Bury Lancs
  • Posts: 39810
    • ML350 TDM SmartRoadster
    • View Profile
Re: my dead polisher
« Reply #17 on: 04 August 2009, 18:26:30 »
Quote
Should add, pretty sure a KBPC606 will do the job

So ..... if I go into the local radio spares place armed with what I've just removed, they'll have one?

And I'll have my polisher back .... for a while!  :y  :y
Logged

Andy B

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Bury Lancs
  • Posts: 39810
    • ML350 TDM SmartRoadster
    • View Profile
Re: my dead polisher
« Reply #18 on: 04 August 2009, 18:28:31 »
Quote
Well if you do a resistance measurment on the part you will find 2 pins shorted together and the rest displaying typical forward and reverse bias diode behaviour

Will I?  ::)  ::)  ::)  ::)

forward/reverse diode failure? It'll let current flow in either direction?  :-/ It's a looong time since I've done electronics.  :y   :y


Logged

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34046
  • Git!
    • View Profile
Re: my dead polisher
« Reply #19 on: 04 August 2009, 18:29:42 »
Logged

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34046
  • Git!
    • View Profile
Re: my dead polisher
« Reply #20 on: 04 August 2009, 18:30:20 »
Quote
Quote
Well if you do a resistance measurment on the part you will find 2 pins shorted together and the rest displaying typical forward and reverse bias diode behaviour

Will I?  ::)  ::)  ::)  ::)

forward/reverse diode failure? It'll let current flow in either direction?  :-/ It's a looong time since I've done electronics.  :y   :y



yes
Logged

Andy B

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Bury Lancs
  • Posts: 39810
    • ML350 TDM SmartRoadster
    • View Profile
Re: my dead polisher
« Reply #21 on: 04 August 2009, 18:32:58 »
Quote
http://www.maplin.co.uk/Module.aspx?ModuleNo=19088#specifi

95p


thanks for that Mark .... which one is it?

is there anything this forum doesn't know about?  ;D  ;D  ;D


Logged

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34046
  • Git!
    • View Profile
Re: my dead polisher
« Reply #22 on: 04 August 2009, 18:32:58 »
5 mile drive for you to Bolton....and there open till 8
Logged

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34046
  • Git!
    • View Profile
Re: my dead polisher
« Reply #23 on: 04 August 2009, 18:33:35 »
KBPC606....
Logged

Andy B

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Bury Lancs
  • Posts: 39810
    • ML350 TDM SmartRoadster
    • View Profile
Re: my dead polisher
« Reply #24 on: 04 August 2009, 18:33:43 »
Quote
5 mile drive for you to Bolton....and there open till 8

I drive passed it coming home from work!  :y  :y  :y
Logged

Andy B

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Bury Lancs
  • Posts: 39810
    • ML350 TDM SmartRoadster
    • View Profile
Re: my dead polisher
« Reply #25 on: 04 August 2009, 18:37:42 »
Quote
KBPC606....


Thanks


I have to ask ...... from what I remember of eletrickery, a bridge rectifier makes a kind of DC voltage from AC volts. So, why not just fit an AC motor inside the polisher in the first place rather than a DC motor and using the bridge rectifier?  :-/
Logged

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34046
  • Git!
    • View Profile
Re: my dead polisher
« Reply #26 on: 04 August 2009, 18:39:56 »
Lol....yes, it creates a bumpy form of DC from AC  ;D

Your polisher will have a series DC motor in it, as will your drill etc. A true AC motor (i.e. an induction motor) would be bloody huge and heavy!

No you can feed a series DC motor with AC.....but it operates better on a DC'ish supply.

Plus, does it have a speed control?
« Last Edit: 04 August 2009, 18:40:18 by Mark »
Logged

Andy B

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Bury Lancs
  • Posts: 39810
    • ML350 TDM SmartRoadster
    • View Profile
Re: my dead polisher
« Reply #27 on: 04 August 2009, 18:45:01 »
Quote
....
Plus, does it have a speed control?

No. It's one of these ..... http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_189810_langId_-1_categoryId_165640

I know where you're coming from though re speed control. The RN hadn't progressed to inverters when I was in the Navy. I was quite intrigued when I saw an AC motor 'ramp up'  :-?  :y
Logged

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34046
  • Git!
    • View Profile
Re: my dead polisher
« Reply #28 on: 04 August 2009, 18:47:49 »
In which case they could have been dead clever and used a shunt DC motor which will give a constant speed (near enough) independent of load
Logged

Andy B

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • Bury Lancs
  • Posts: 39810
    • ML350 TDM SmartRoadster
    • View Profile
Re: my dead polisher
« Reply #29 on: 04 August 2009, 18:53:44 »
Quote
In which case they could have been dead clever and used a shunt DC motor which will give a constant speed (near enough) independent of load

I'm now at the edge of my electrickery knowledge!  ;D  ;D  ;D  ;D

When were all doing our 'multi-skilling' the only DC motor on site had its brushes changed every 3 months as we came back to work from college!  ;D  ;D   :y
Logged
Pages: 1 [2] 3  All   Go Up
« previous next »
 

Page created in 0.44 seconds with 20 queries.