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Member postings for Journeyman

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

Thread: small cast iron flywheel
01/06/2018 09:18:31

Have a look at RC Machines they may have the very "Flying Wheel" that you need.

John

Thread: Hello from London
31/05/2018 12:16:50

Hi Ian, welcome aboard. You could try Ickenham & District Society of Model Engineers a friendly bunch have a nice workshop. Harlington Locomotive Society have a good raised 5" & 3.5" track. But both might be slightly too West depending on your bit of North London!

John

Thread: Myford Super 7
29/05/2018 12:14:47

I'm with Dave (S.O.D.). There are an awful lot of lathes in the world and most of them aren't Myfords!

If you want new then probably Chinese. If you want 2nd hand then a good Boxford or Colchester is hard to beat. If it really must be a Myford then be careful in your choice there are many vastly overpriced examples out there.

John

Thread: Wobbler Pivot
26/05/2018 09:40:46

Yes a spot of confusion between one of these, a wobbler or oscillating steam engine:-

assemrun.jpg

and one of these, a wiggler or wobbler or centre/edge finder:-

wiggler.jpg

Build article for steam engine *** HERE ***

John

Edit: Wrong photo

Edited By Journeyman on 26/05/2018 09:47:53

Thread: sealed glass window failure
20/05/2018 09:19:31

Mick, there was a *** recent thread *** on similar lines has a few links and a video of what you are talking about.

John

Thread: Bent leadscrew?
17/05/2018 09:44:00

Could this be caused by the handwheel gear train tightening intermittently onto the rack as the leadscrew drives the carriage along. May be possible to test just by winding the carriage back and forth by hand and noting if there are any stiff spots.

John

Thread: X3 mill spindle tightness
09/05/2018 12:03:37

Might be worth checking the spindle for cracks! See this ***THREAD*** Mechman48 has a photo of the problem.

John

Thread: Emco V10P carriage stop
23/04/2018 15:08:39

You could try something like this:-

sadstopmk2.jpg

The angle of the 'V' bed on the Emco looks to be at 90deg but one side longer than the other. You may be able to modify my design a bit,. Drawing and build ***HERE***

John

Thread: Condensation Management
21/04/2018 12:15:46

A very good & free (GPL licence) all purpose editor is Notepad++ it will deal with most kinds of code from HTML to C. I use it for PHP web page editing. Only for windows though.

John

Thread: Drilling small holes
21/04/2018 10:28:57

Too slow! Drill speed should be in the order of 3500 to 4000 rpm. No pressure on the drill just peck very gently. If you have the CNC router I would be inclined to give it a go provided you can set the Z downfeed very fine and peck away at the holes.

John

Thread: Plastic Ban
20/04/2018 10:15:28
Posted by SillyOldDuffer on 20/04/2018 09:57:09:

I much prefer reading paper to online versions, but Digital might be an alternative to an erratic postal service. Unless you hate computers or suffer from koumpounophobia.

smiley

I read my digital subscription on a tablet which prevents phobic problemsdevil

John

19/04/2018 19:59:58

This link to a BBC News item gives some idea where it is all coming from.

John

Edited By Journeyman on 19/04/2018 20:04:55

Thread: Mystery tool
14/04/2018 16:46:03

The bit with the red handle is a pretty standard toggle clamp:

toggle.jpg

Available from Axminster for the princely sum of £6.96. The OP's version is in use on some kind of fixture no idea what that might be for!

John

Thread: Off the shelf E.R collet chucks worth it?
14/04/2018 13:08:13

Out of curiosity I just measured the runout on my Warco bought ER25 lathe chuck. As best I can measure it the internal taper is .005mm out front and back. I think that will do me nicely. I machined the backplate to fit on the lathe but used cap screws from the rear rather than have bolt heads on the front. Wrote it up *** HERE *** if anyone is interested.

John

Thread: Clarke CL350
10/04/2018 15:11:00

Posted by Jon Cameron on 10/04/2018 14:35:32:

...can anyone tell me where the DRO's can be aqquired from on the cross slide and top slide, also are they any good since they appear to now be missing.

I don't think those shown in the link photo  are proper DRO's more of a rotary encoder that counts turns and multiplies by the leadscrew pitch. So only as accurate as the leadscrew and takes no account of backlash! You are possibly better off without them.

John

Edited By Journeyman on 10/04/2018 15:12:54

Thread: Ml4 change gears
08/04/2018 14:00:52

Thanks Brian, I think most of my confusion arose from the "Mandrel" gear which I erroniously assumed was the "Spindle" gear not something that was in fact half way down the gear train. It's a long time since I used a Myford. I hope my error has not confused the OP, if so my apologies.

John

08/04/2018 12:58:04
Posted by Brian Wood on 08/04/2018 12:38:20:

Journeyman,

Sorry to have to correct you, the spindle gear, reversing cluster and the erroneous 26T gear are all part of the first stage in the drive down from the spindle and will normally be, in this case, 25/25 to give a ratio of 1, I have corrected the 26 to 25. Note they are all running as idlers however they are meshed..

The first WORKING gear in the change wheel drive is in this case the 20T gear

Regards

Brian

Don't be sorry! I understand now what you have done. Always willing to learn a bit but things take longer to sink in these dayssad Just to put my mind at rest, I did the calculation again using all the gear ratios but using your assumed 25t gear and got the same answer as you. The idler ratios do indeed cancel each other out...

John

Edit: Typo

Edited By Journeyman on 08/04/2018 13:21:58

08/04/2018 12:31:32
Posted by Hopper on 08/04/2018 12:23:04:

IE, back to the 20/65 as per Brian Wood above.

Edited By Hopper on 08/04/2018 12:25:15

Yes, but the mandrel is 25 so should be 25/65 which still gives and end result of .048076 or 20.8TPI !

John

08/04/2018 12:08:07

My maths / arithmetic is pretty ropey but the OP says the mandrel is 25 tooth so by my reckoning it looks something like this, using all the gears that are in mesh:-

Ratio (Driver/Driven) = 25/20 * 20/26 * 26/45 * 45/30 * 30/65
                             = 1.25 * .7692 * .5777 * 1.5 * .4615
                             = .384615
Multiply by pitch (.125) = .048076 or 20.8 TPI or about 1.25mm pitch

I rounded the ratios a bit as they work out to about 8 decimal places as is usual with gear calculations. Don't know whether this is particularly useful, is the set of gears shown supposed to provide a specific pitch / tpi?

Of course my calculations may be off or I have misunderstood something (probably both) frown

John

Edit: trying to space it out!

Edited By Journeyman on 08/04/2018 12:25:51

Thread: Wind turbines get bigger and bigger
03/04/2018 17:33:52

Gas Plasma Waste Recycling is the way to go. Solves two problems at once, gets rid of garbage and generates electricity. I don't think they have all the bugs out of the system yet but definitely looks promising.

John

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