It is the normal type that needs a bag. For a while now I have had to thump it to get it to go and now it has stopped altogether.

I have opened it up to test for a loose connection, when I use use the multimeter to test for 240v across the terminals of the motor it bursts into life.
What is going on?

Thanks

Brendan.

On Sat, 22 Feb 2014 08:08:53 -0800, Rednadnerb wrote:

It is the normal type that needs a bag. For a while now I have had to
thump it to get it to go and now it has stopped altogether.

I have opened it up to test for a loose connection, when I use use the
multimeter to test for 240v across the terminals of the motor it bursts
into life.
What is going on?

Interesting that the incredibly light load imposed on this circuit by the
meter's internal resistance 'cures' the fault. As a work-around/bodge and
if no one suggests any better, just wire a high value resistor across the
same terminals as a short-term fix.

When you say the motor terminals are they the brushes on the motor itself? If so the slight pressure you are putting on them with the probes might be pushing them onto the commutator thus suggesting the brushes might be worn and need replacing. A good indicator of worn brushes is excessive sparking on the commutator.

Richard

No, not the brushes but the terminal outside the motor where the wires are fed from the mains plug and the switch.

"Rednadnerb" wrote in message
...
No, not the brushes but the terminal outside the motor where the wires are
fed from the mains plug and the switch.


Probably the loose connection is right there.
You need to tug and tweak at the wires to see if anything pulls out.

On Sat, 22 Feb 2014 08:08:53 -0800 (PST), Rednadnerb
wrote:

It is the normal type that needs a bag. For a while now I have had to thump it to get it to go and now it has stopped altogether.

I have opened it up to test for a loose connection, when I use use the multimeter to test for 240v across the terminals of the motor it bursts into life.
What is going on?

Thanks

Brendan.

Unplug it and test for continuity on the low ohms range from plug to
motor, live side, then neutral side.

Move the flex around where it enters the machine and where it enters
the plug as these are the common failure points.

Also there might be an overheat thermostat in the circuit that
operates if the motor overheats, I have known these to take 10-15
minuets to reset.

In article ,
says...

No, not the brushes but the terminal outside the motor where the wires are fed from the mains plug and the switch.

Bad connection overcome by applying pressure to the terminal?

Do it again but without the meter in circuit (don't short the test
leads, obviously).

--
Sam

Graham. wrote:
On Sat, 22 Feb 2014 08:08:53 -0800 (PST), Rednadnerb
wrote:

It is the normal type that needs a bag. For a while now I have had to thump it to get it to go and now it has stopped altogether.

I have opened it up to test for a loose connection, when I use use the multimeter to test for 240v across the terminals of the motor it bursts into life.
What is going on?

Thanks

Brendan.

Unplug it and test for continuity on the low ohms range from plug to
motor, live side, then neutral side.

Move the flex around where it enters the machine and where it enters
the plug as these are the common failure points.

Also there might be an overheat thermostat in the circuit that
operates if the motor overheats, I have known these to take 10-15
minuets to reset.

A case of dancing thermostats?

On Sun, 23 Feb 2014 13:55:37 +1100, F Murtz
wrote:

Graham. wrote:
On Sat, 22 Feb 2014 08:08:53 -0800 (PST), Rednadnerb
wrote:

It is the normal type that needs a bag. For a while now I have had to thump it to get it to go and now it has stopped altogether.

I have opened it up to test for a loose connection, when I use use the multimeter to test for 240v across the terminals of the motor it bursts into life.
What is going on?

Thanks

Brendan.

Unplug it and test for continuity on the low ohms range from plug to
motor, live side, then neutral side.

Move the flex around where it enters the machine and where it enters
the plug as these are the common failure points.

Also there might be an overheat thermostat in the circuit that
operates if the motor overheats, I have known these to take 10-15
minuets to reset.

A case of dancing thermostats?

The dance is a minuet

the time is minute

Knowing I often get this wrong, I typed minuets into Google and got a
page full of time related results. What I missed was that it had taken
upon itself to presume I meant minutes, although why it thought plural
dances were problematic, I know not.

Graham. wrote:
On Sun, 23 Feb 2014 13:55:37 +1100, F Murtz
wrote:

Graham. wrote:
On Sat, 22 Feb 2014 08:08:53 -0800 (PST), Rednadnerb
wrote:

It is the normal type that needs a bag. For a while now I have had to thump it to get it to go and now it has stopped altogether.

I have opened it up to test for a loose connection, when I use use the multimeter to test for 240v across the terminals of the motor it bursts into life.
What is going on?

Thanks

Brendan.

Unplug it and test for continuity on the low ohms range from plug to
motor, live side, then neutral side.

Move the flex around where it enters the machine and where it enters
the plug as these are the common failure points.

Also there might be an overheat thermostat in the circuit that
operates if the motor overheats, I have known these to take 10-15
minuets to reset.

A case of dancing thermostats?

The dance is a minuet

the time is minute

Knowing I often get this wrong, I typed minuets into Google and got a
page full of time related results. What I missed was that it had taken
upon itself to presume I meant minutes, although why it thought plural
dances were problematic, I know not.




Just my attempt at humour.

No its the physical movement that is the point here, as I say, its brushes
or commutator almost certainly If you really want to bugger up a vacuum, try
picking up spilled toner with it...
Brian

--
Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email:
__________________________________________________ __________________________________________________ __________


"Cursitor Doom" wrote in message
...
On Sat, 22 Feb 2014 08:08:53 -0800, Rednadnerb wrote:

It is the normal type that needs a bag. For a while now I have had to
thump it to get it to go and now it has stopped altogether.

I have opened it up to test for a loose connection, when I use use the
multimeter to test for 240v across the terminals of the motor it bursts
into life.
What is going on?

Interesting that the incredibly light load imposed on this circuit by the
meter's internal resistance 'cures' the fault. As a work-around/bodge and
if no one suggests any better, just wire a high value resistor across the
same terminals as a short-term fix.

On 22/02/14 16:08, Rednadnerb wrote:
It is the normal type that needs a bag. For a while now I have had to
thump it to get it to go and now it has stopped altogether.

I have opened it up to test for a loose connection, when I use use
the multimeter to test for 240v across the terminals of the motor it
bursts into life. What is going on?

brushes gone

Thanks

Brendan.



--
Ineptocracy

(in-ep-toc-ra-cy) €“ a system of government where the least capable to
lead are elected by the least capable of producing, and where the
members of society least likely to sustain themselves or succeed, are
rewarded with goods and services paid for by the confiscated wealth of a
diminishing number of producers.

Looks like I will never know.
I can't get anything out of it no matter how I poke or prod.
There is no sign of an external thermostat or cut out switch, I don't know if they build them into the motors.

It still shows 240v across the terminals which leads me to suspect it is something further downstream.

Thanks for all of your suggestions.

Brendan.