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What did you do today (2015)

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Johnboy2530/12/2015 08:46:04
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Clive.

Re.  Waiting now for the next trip out! We have been free of any for some days now.

Just a thought... A long while ago a friend of mine had a similar problem - we traced it down by isolating various circuits in the house. We narrowed down to the garage and workshop. Consequently cutting the story short - I found that a leg of the lighting circuit had a low insulation to earth. This was traced back to some old fluorescent light fittings. The one which was found to be causing the problem had a strip of resin synthetic bounded paper insulation with terminals connecting to the other components mounted on a blast choked. It turned out the problem only occurred after a wet/damp spell where the SRBP absorbed moisture hence reducing the insulation resistance! When we found this I can remember the amazement that that a piece of insulating material had become hygroscopic.

Another area to check is insulation to earth with the neutrals isolated for each circuit. Low resistance when isolated will cause an imbalance to the RCD.

I hope this might help with the fault finding - please excuse me if I'm telling you 'how to suck eggs'!

John

Ian S C30/12/2015 11:03:34
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7468 forum posts
230 photos

Beware of old fluro fittings, one member of this forum lost his workshop to a fire traced to a faulty fluorescent fitting.

Ian S C

Andrew Johnston30/12/2015 12:23:03
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Posted by John Stevenson on 29/12/2015 12:26:47:

To set a tool offset you position the tool clear of any clamps and zero the Z axis. You then enter the tool number, jog down until you just touch the work and press Set Tool Offset, this then swaps the value in the Z box and applies it to the H [ hight] box.

I used to do something similar, essentially touching off each tool on the work. Fine for HSS tooling but being a butter fingers I found that going a gnats wotsit too far with carbide tooling resulted in a chipped cutting edge. sad Even worse I wasn't automatically saving the offsets, but writing them down and manually applying them each time I changed tools. Inevitably I forgot sometimes, or forgot to press 'Enter', and had a few wobblies involving broken cutters.

Preventing damaged tooling was one of the main drivers for me getting an electronic tool setter. It's also quite a lot quicker.

Andrew

Andrew Johnston30/12/2015 12:30:31
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5972 forum posts
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I prefer the Tormach screen - BIG buttons with a clear indication of function. When you're in a "oh fudge, shouldn't have done that" mode you want a big, obvious, stop button to hit before disaster strikes!

Andrew

Andrew Johnston30/12/2015 12:37:59
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Posted by John Stevenson on 30/12/2015 02:01:56:

People want to just use machines and not be programmers or geeks.

Yep, that's definitely me. I want to design and make parts, not get bogged down in creating the means to produce parts.

Mind you it would be unfair to label me a cheque book engineer; I normally use my credit card instead. smile

Andrew

Bob Rodgerson30/12/2015 12:52:31
605 forum posts
174 photos

I have played about a bit more with the Duality Lathe, After trying out the reduce diameter conversational programme on a bit of Aluminium I tried it on a large chunk of EN36 2 1/2" diameter . Initially the chatter was horrible so I decided to take the piece out of the chuck, machine out the chatter pattern, centre drill it and then return it to the Duality lathe with the Tailstock providing extra support. This time it worked and I turned it down to 3/4" dia with a 1/4" radius at the shoulder and removed the tailstock. With the tailstock out of the way I faced off the end until the centre hole was machined out and cut a taper.

Next operation will be to drill a through hole and cut a taper in the bore to suit the end of a magneto. This will be followed with the cutting of some sprocket teeth.

Here are yesterdays efforts.

Edited By JasonB on 30/12/2015 16:11:47

John Stevenson30/12/2015 13:05:00
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Bob,

Don't know if you know this but there is a nice free program for designing sprockets on the web called Sprocketeer.

**LINK**

I know a lot of CAD programs can do it now but it's really a heads up for everyone.

Michael Gilligan30/12/2015 13:16:19
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17658 forum posts
811 photos

Re. Sprocketeer

That's brilliant ... Thanks, John.

The 'online' version even works on my [v1] iPad.

MichaelG.

Bob Rodgerson30/12/2015 13:21:40
605 forum posts
174 photos

Hi John,

I have "Gearotic" which is a brilliant bit of software for all sorts of gearing and pullies. It has loads of different gearing types, spiral bevel, plain bevel, straight tooth, Helical as well as all types of toothed pulley forms, clock making stuff and more. Sprocketeer looks good though and it's free.

bob

Neil Wyatt30/12/2015 16:41:07
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Posted by Mad muppet on 30/12/2015 06:44:54:

Long live the retired. Happy New Year to you all
Mad Muppet

Now you can Thai up a few loose ends

Have a long and happy retirement!

Neil

JasonB01/01/2016 07:27:14
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