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Member postings for Andyf

Here is a list of all the postings Andyf has made in our forums. Click on a thread name to jump to the thread.

Thread: Is this porn ?
08/04/2012 15:35:17

This completely innocuous US site deals in parts for folk who want to make pens:

http://www.penisland.net/

Maybe it was chosen because it's easily remembered.

Andy

Thread: Lathe Carriage/Saddle Stop
06/04/2012 00:33:32

To my mind, ChrisH, there are two sorts of saddle stop.

The first is only useful if you are traversing the saddle by hand, and consists of something like the one Neil (Stubmandrel) has shown. On repeated cuts, the saddle bumps up against it, stpping the saddle in the same place each time. For obvious reasons, you can't use it when the saddle is being traversed under power.

The second sort can be used under power, because it either:

(a) cuts off power to the motor when the saddle reaches a predetermined point; this is tricky, because inertia in the motor and spindle may cause problems with repeatability, and trailing wires to switches are needed.

(b) disconnects the power feed by triggering a dog clutch on the leadscrew (as on a Cowells lathe) or by opening the half nuts. I made one which opens the half nuts, which is shown here:

< http://andysmachines.weebly.com/semi-automatic-saddle-stop.html >.

I got the idea from John "GadgetBuilder", though the geography of my lathe meant I could work more in two dimensions than three. His is here:

< http://www.gadgetbuilder.com/ThreadingTools.html#AutoStop >

Andy

Thread: Clarke CL250J motor controllor
06/04/2012 00:06:59

Hi Dave,

You may get a bit of help from Little Machine Shop's trouble-shooting guide here:

< http://littlemachineshop.com/Reference/DriveTroubleshooting.pdf >.

If you haven't come across them before, LMS is the main US source of spares and

info for lathes which (like yours) originate from the Seig factory in China.

Andy

PS: I had difficulty reading your initial post, because a banner advert down the RH side of

my screen obscured much of it, which is why there are a lot of carriage returns and hence

wide line spacing in this reply, and in the copy of the post which I've pasted in below.

I found the excellent post created a while back on the forum a couple of years ago

http://www.model-engineer.co.uk/forums/postings.asp?th=38809&p=1

This board is the CL250 version ther actual pcb markings 'Xin Yun Electront SMD-FC250.

What happens is when the speed pot is advanced it goes from a standing to almost full

speed, from about 10 o'clock position, the speed is controllable slightly from this point!

It works perfect on a Lamp load varying very steadily but not the motor.... yet the motor

runs comfortably on a 12V DC bench top power supply.

As mentioned in the post I did some checks these are checking the post these are

measuring the pot and checking the voltage between pins 2 & 3 varys between 0 & 12V.

I've recapped using 105 deg. low ESR types.

If it comes to replacing the SMDs I can do that being in the trade... this fault is bugging

me, thinking it's around the feedback circuitry... be interesting to see what happens on

a 'dummy load' drawing an amp or two, which I've never tried yet.

The motor kicks better than the Co-op donkey when starting from a stop to full speed!

This board used the open type trimmers not the multi-turn trim pots.

Clues anyone pleas? Thanks

Dave

Unfortunately, I can't really read your post because a banner advert obscures the RH side of it

Thread: is it the end of it =(
05/04/2012 00:20:09

It sounds like the problem may have been the result of worn-out brushes, Mike. A timely reminder that I should check mine in the morning! Bit of a nuisance to get the motor out, but it might save £75.....

Andy

04/04/2012 00:31:56

Are you sure it's the motor that's gone west, Mike, and not the speed control board or the auxiliary board with the relay which starts/stops the motor? Even if it is the motor, it might only need new brushes.

That said, if a plume of magic smoke and a horrible smell came from it, you probably do need a new motor. Warco or Amadeal should be able to fix you up with another one.

Andy

Thread: Spammers
26/03/2012 14:31:50

No 2 Son was probably hankering after something more piquant than Aussie "Vegemite". Tesco have that, so I tried a jar. In future, I'll stick to Marmite.

Unhealthy Spam rarebits: put slices of Spam under the grill until slightly crozzled. Turn over, put cheese on top of the Spam and grill until melted. Serve with Heinz spaghetti and cotton wool type bread to mop up the juices.

Andy

Thread: Model Engineers' Workshop 188
20/03/2012 19:29:17

Oh dear, DC; you have made a rod for your own back! No reports of torn covers, but your enquiry has revealed another problem: crumpled innards.

I'm sure that if torn covers were widespread, WH Smith would have piped up.

My postal copy was pristine, inside and out.

Andy

Thread: Just read this "beginners guide" and laughed a lot!
15/03/2012 18:18:09

Hi David,

I've added a proper attribution, and the link to this site which you suggested. Of course, there's no guarantee this will fend off trouble, but if Magicalia complain, I will remove the page forthwith. Same if I hear from the original author (or his executors), though that's perhaps unlikely after 50-odd years.

I hadn't realised that it was one of a series. As John Stewart says, it might be worth reprinting the lot!

Not sure if any of my projects are worth writing up, and it might mean a bit of work in remaking the really ugly bits and polishing things up for photos. If you think anything is worthy of publication, send me a PM.

Regards,

Andy

15/03/2012 00:19:24

The "andysmachines" website is mine. As stated at the top of the page, I didn't know the origin of the article, but now John Stewart has identified the author, I'll be happy to add a proper attribution. But by putting it out on the Interweb, am I breaching the copyright of the author or the publication (Model Engineer, probably) where it first appeared?

Andy

Thread: What exhibition?
13/09/2011 00:27:11
Hi Goran,
 
I'm not going to recommend an exhibition to visit, because I only ever go to the one in Harrogate, but when choosing, do bear in mind that even in summer the UK and Germany may feel pretty cool to someone from La Palma. Late autumn, winter and early spring would definitely require investment in warm clothing!
 
Andy

Edited By Andyf on 13/09/2011 00:27:49

Thread: Dore Westbury Milling Machine
01/07/2011 08:43:12
Posted by Chris Trice on 29/06/2011 23:38:56:
Wasn't the Dore Westbury a kit? I had a Mk 1 (bought secondhand finished) and remember the belting being standard V belt.
 
I have a Mk I and use a car fan belt on its 3-step pulleys. But I think the Mk II pulleys are 5-step, with narrower grooves to take a round belt. See third pic down here: http://www.lathes.co.uk/dore%20westbury/page2.html
 
Andy
 
Thread: Visiting UK
07/09/2009 13:24:55
Manchester Museum of Science and Industry is worth a visit if you are in the area. Large steam hall with many working static engines and (non-working) locomotives. A couple of locos in steam outdoors, offering a short (400m or so) ride to the  world's oldest railway station, which is also part of the Museum.
 
 
And it's free
 
Andy
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