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Member postings for john carruthers

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

Thread: What did you do today (2015)
03/05/2015 12:27:35

You are correct Chris, Toby is an epileptic wusshound, a collie x lab.
patterdale (1)sm.jpg 
Not unlike a JR,  Patterdales are a proud dog of the working man, they are 'good doers' and will live on next to nothing, rats for preference (but they do like Dinsleydale cheese). This one was a rescue, very fierce, completely untrainable though he has calmed a bit. He guards the shed and sometimes will not let anyone in, even me. If it moves he will try to kill it.

Edited By john carruthers on 03/05/2015 12:28:26

03/05/2015 08:20:23

toby+milo.jpg

Toby the Lab and Milo the Patterdale. Patterdales make good shed dogs and are mighty slayers of mice.
 

Edited By john carruthers on 03/05/2015 08:22:09

Thread: Temporary adhesive
24/04/2015 14:51:46

soft solder ?

Thread: What did you do today (2015)
24/04/2015 14:32:44

mic pinion done.jpgAll done, I took a leaf (?) from Mr. Stevenson's book and put a tiny spot of weld on, then roughly filed the teeth, then put it on the lathe to turn the max diameter. Then I set up a 24 tooth wheel as an index to profile the teeth. Works fine and I can't feel when the new teeth make contact with the rack thumbs up

23/04/2015 15:44:52

Always expect the unexpected.....

You never know what will come through the door next.

Today it's a microscope from Alexander Fleming's lab at Walmer, 3 leaves stripped from the focus pinion.
I patched it up temporarily with silver solder filed to the profile so they can use it.
I shall make a new shaft and 12 leaf pinion for it eventually once I rig a dividing index and grind a tool to the correct profile.

fleming microscope (2).jpg

fleming microscope sm.jpg

22/04/2015 16:17:33

After seeing a good idea on here I've been tinkering around making an 8mm expanding mandrel to hold timing pulleys. Much quicker and more accurate than chucking them every time.
Just tighten or release the cone shaped Allen bolt in a conical (centre drill) hole.
I often have to turn the pulley boss down so can't use that to chuck them.
I shall gradually make a set of the common sizes, 10mm and 12mm, or maybe just make sleeves?

htt8mm mandrel.jpg

Edited By john carruthers on 22/04/2015 16:18:06

Thread: Were castings cheap back then?
21/04/2015 08:13:00

we took the loo out first, we're not silly face 20

Later we did helmet mounts, then got on to tempering the blades but that would be another thread.

How many old locks must I have smashed up for the brass bits?

21/04/2015 07:39:41

Yes we did a bit of brass/bronze casting with a little Vortex kiln. Mainly pommels and quillons for viking swords. The first few were rubbish, full of holes and crud, but they gradually improved. The first attempt was in a mate's cellar, no vents, very silly, his eyes went green. After that we moved to the outside loo.

Thread: Milling machine as a morticer?
20/04/2015 08:38:48

Totally agree pgk, had Chippendale access to modern glues and finishes he would have used them in an instant.
We often had to replace joinery in conservation areas, as you say, so long as it looked right and was sympathetic to the original it usually passed.

Does no one drill and chop mortices any more? I had limited access to a mortising machine so always removed as much waste as possible before showing it a chisel.

Thread: Myford lead screw
18/04/2015 13:03:19

mini lathe handwheel mod;
http://www.toolsandmods.com/lathe/mini-lathe-leadscrew-handwheel

Thread: Designing a coolant system for an Adept
18/04/2015 13:01:19

Windscreen washer pump? or, as I rigged at work; a hanging putty bucket with a spout,and a 1/4" hose with a little tap on the end ?

Thread: Know nothing
18/04/2015 08:04:22

Nick, have you tried the local model engineering society? It sometimes takes a while for information to disemminate through the grape vine.

Thread: Drummond pre B type
14/04/2015 07:38:50

If you download NThreadP.exe you can enter your lead pitch and gears then it will work out a train for you...


http://www.denfordata.com/bb/viewtopic.php?p=2997

Thread: Expedient protective coating for aluminium?
10/04/2015 09:19:13

Know anyone with an oxygen bottle? fresh ally oxidises really fast to Al2 O3, tough stuff.

Thread: What did you do today (2015)
08/04/2015 08:17:31

Finally gotaroundtu making some long bolts to lock my tailstock and top slide so I don't have to keep faffing with Allen keys.

Thread: Speed Control or Countershaft for Flexispeed Lathe?
06/04/2015 09:48:13

The pulleys on mine came with the machine, they are 2 x 12mm wide V with root diameters of 47mm, 34mm, and 22mm. The lay shaft just runs in a pair of Picador standards.The motor is a 1/3 HP with a 35 dia pulley driving the layshaft with a 135mm dia pulley. I have now rigged the motor on an overhead bracket so the weight of the motor tensions the belt but it's easy to swap speeds. It also prevents the weight of the motor twisting the bed by hanging off the back as per the recomended set up. I believe the drive set came from Flexispeed originally? but Chronos do a range of similar pulleys etc.

https://dl.dropboxusercontent.com/u/95073912/fm%20pulleys.JPG

Here's a neat idea; Lathe in a Box....
https://sites.google.com/site/flexispeedlatheinabox/

Edited By john carruthers on 06/04/2015 09:54:35

Thread: Flexispeed Lathe Motor and Power Supply
06/04/2015 09:18:57

/meteor%20II%20manual.zip

Here's the manual for the Flexispeed Meteor II, (not exactly an epic publication).

Edited By Neil Wyatt on 06/04/2015 12:40:19

Thread: Speed Control or Countershaft for Flexispeed Lathe?
06/04/2015 08:37:48

Hi James, mine came with a 3 step pulley and countershaft, works fine.
http://www.model-engineer.co.uk/sites/7/images/member_albums/144829/594062.jpg

Thread: single phase motor-calculating rpm
04/04/2015 08:42:55

I made a polisher from an old wiper motor and box with a pwm board for speed control. Worked fine on the 8" but struggled with the 10" mirror (F6.4).

Thread: What did you do today (2015)
04/04/2015 08:38:45
Posted by martin perman on 31/03/2015 20:01:34:

Good evening Neil, At the moment all I want is a means of looking at the stars, an equatorial mount can come later, I do have a friend who used to make programmable mounts and I will approach him for his view point.

I will look on the internet for a skywatcher Heritage 130P

Thanks for your assistance, there maybe more questions.

May I suggest you pop along to your local Astronomical Society meetings and try a few scopes out before you buy? Most clubs have scopes they loan to beginners. Try the various instruments for weight and working height. Here's a list of UK societies...
http://fedastro.org.uk/fas/members/members-a-z/

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