I was using the liquidiser attachment.
The speed control knob has a feature that if you turn it a little to the
left it goes at max speed. This is sprung loaded so returns (normally) to
'off'. Only it didn't , I turned it to the left and it went past the stop
and refuses to turn back to the corrrect position.
I've tried, with reasonable force to pull this knob off, thinking it might
be similar to a cooker knob but failed.
I'm getting a lot of grief so if anyone can offer any advice with regards
fixing the problem, I would be grateful.
mark
>
> I'm getting a lot of grief so if anyone can offer any advice with regards
> fixing the problem, I would be grateful.
Large box of chocolates and a bunch of flowers would seem to be the
obvious first step.
--
Bernard Peek
b...@shrdlu.com
you fail to say what model, but our very old one which I successfully
repaired is a very simple beast. The knob actually in ours works a cam
that seems to compress a blob of what I take to be variable resistance
material
You can get the things more or less apart by removing the base.
There are a lot of online help topics as well. I diagnosed mine as blown
capacitors which indeed was the case.
It is 35 years old, maybe more. and spares are still available. so there
is no excuse for you at least opening it up.
Tale photos though as you dont want to forget how to reassemble.
> mark
>
>
>> I'm getting a lot of grief so if anyone can offer any advice with
>> regards fixing the problem, I would be grateful.
>
> Large box of chocolates and a bunch of flowers would seem to be the
> obvious first step.
But kept hidden until the problem is owned up to or discovered,
otherwise suspicions will be aroused.
--
Cheers
Dave.
Mine's even simpler, I have a centrifugal switch where the knob via a cam
compresses a spring increasing contact time (with feedback) to make it go
faster.
Cor - we had one like that in the 60s. IIRC it's still going strong and
my sister's got it. The bang-bang speed control was very noisy.
--
Skipweasel - never knowingly understood.
It doesn't pull off IIRC. Prise out the central part of the knob, the label
bit saying kenwood, and there's a spring clip or something like that holding
it on. Yours may be different ofc, as ours is just over 30 years old.
--
Bernard Peek
b...@shrdlu.com
>In article <io11un$2us$1...@dont-email.me>, fre...@spam.com says...
>> Mine's even simpler, I have a centrifugal switch where the knob via a cam
>> compresses a spring increasing contact time (with feedback) to make it go
>> faster.
>
>Cor - we had one like that in the 60s. IIRC it's still going strong and
>my sister's got it. The bang-bang speed control was very noisy.
I think mine is of similar vintage. IIRC, when they brought out
the first "electronic" version, they didn't really make it much
more sophisticated, simply inserted a triac (or something
similar) so that the contact didn't switch the load directly.
Chris
--
Chris J Dixon Nottingham UK
ch...@cdixon.me.uk
Have dancing shoes, will ceilidh.
I think ours is the 'first triac' type and as far as I can tell, the
dial squashes a black rubbery blob, that controls the input to that
triac. I.e. they have made a variable pot out of this black blob and a
cam that squeezes it.
I can confirm that removing the knob center allows access to a circlip
(IIRC : possibly a screw) that lets you remove the knob, but I decided
to leave ours in place, as it appeared to be fully functional.
But really, these are a fair delight to fix, being built before the days
on unserviceable PCBs and chips.
> Chris
OP writing:.
The machine is a modern one which I bought online. It is still in warranty
but I don't want it 'gone away' for weeks if it is something within the
realms of my capability (limited!). It does feel as though the dial pushes
against a rubbery blob.
mark