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Member postings for Martin Kyte

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

Thread: down draft table
24/03/2017 15:25:04
Posted by Steven Vine on 24/03/2017 14:50:11:

Get a filter, or be a filter.

Steve

Hadn't heard that one before but I couldn't agree more.

Hi Mark. When you say sensitive what exactly are the symptoms. If you are solely using hand tools then air flow control would seem to be useful. Maybe something at the back of the bench ensuring airflow past you over the work and then away into the extractor rather than underneath. More like the action of a fume hood but without the enclosure. It does sound like your issue is repeated low level exposure rather than high levels of dust. What woods do you use and maybe you could switch varieties for a while.

regards Martin

24/03/2017 15:02:55

Hi Jason. just asking on point one.

Totally agree on point 2. The first stage is not to let the majority of the dust escape into the workshop by extract on the machine. As you say catching the rest is secondary. You need to ensure clean air past your face either by mask or air ducting which I guess is the idea of the table. The dust does however need to get trapped by a good filter as you say. Blowing it outside is a bit of a bodge as it's not really containing the problem just giving it to someone else.

My point on vacs was that they are primarily designed to move air not to filter particulates and you are not necessarily going to know the filter spec on some old vac you picked up for a song.

Your point 3 is essentially what I was suggesting. Buy a commercial dust extractor with good filtration and arrange your own ducting/air table.

regards Martin

24/03/2017 12:36:23

Ah just caught Jasons post. Is that not a vacuum hold down table rather than primarily for dust extraction?

Just a question.

regards Martin

24/03/2017 12:33:22

Trouble with most cheapish vacs is the fine stuff is just going to pass straight through and get blown around the workshop. You need a good filter to trap the fine stuff. Also somewhat tongue in cheek if you are routing slots in mdf to make a down-draught table don't you need the down-draught table first to protect you against the dust of the slot routing?

Be nice to know what Mark actually does with wood.

regards Martin

24/03/2017 12:19:22

I take it you are talking about home operations.

You could consider one of these.

**LINK**

and there is some useful advise here

**LINK**

If you are using woodworking machinery you really do need to get set up with proper dust extraction. Hand tools you don't generate to much fine dust. You should also (perhaps you already are) be aware that some woods and materials are much worse than others. MDF is a point in question mainly because of the binders and chemical treatment and some African hardwoods are particularly bad. Wood is a biological and your immune system is designed to respond to biological molecules so you can get some fairly strong immune responses to some woods if you are careless.

Some more information here

**LINK**

If you really want answers to these questions you should try this forum

**LINK**

but by all means build your extractor table if you are set on it. However if all you are doing is hand work and sanding a household fan to the side of you creating a cross breeze and blowing the dust away from your face would be a start. Axminster and the like do air filters to clean up the whole workshop so they may be an idea.

What ever you do don't put too low a price on the health of your lungs.

regards Martin

Thread: First Project
24/03/2017 11:45:31

The T slots on the cross slide are shown just as slots. I found if you take a piercing saw to them with the cross slide held on the vice you can cut reasonable representations of the _ bit of the T slot. The saw will only really cut on the outside of the piece but that's the only bit you can see. I didn't like the big hex nuts on the end of the spindle either so did some with slots on a 8 point PCD a la crescent wrench style and they are better but still a little chunky. Sometime I may get round to making some more with holes instead of slots. It's an attractive little model. A brass makers plate would look good too after you got rid of the STUART on the casting.

regards Martin

Thread: What Did You Do Today (2017)
22/03/2017 10:02:07

I think you are all being quite unfair to the museums. Much as I regret the losses they do have to cover their operating costs, which even for free museums is all dependent on footfall. Grants depend on this just as much as if they were directly funded out of entrance tickets. Have we not seen exactly this in play with MEX. Either they mothball the collections, restrict them to research activities or they diversify to attract more visitors.

regards Martin

Thread: drilling sandstone
22/03/2017 09:15:25

Copper tube and carborundum grit used as a hole saw with plenty of water lubricant. That's how you drill big holes in thick glass (like telescope mirrors) so you should find sandstone somewhat easier. Small nicks in the end of the tube helps retain the grinding material.

regards Martin

Thread: chuck spares
22/03/2017 09:11:21

Can't you make one or repair the original ?

Martin

Thread: Are we the last generation.?
16/03/2017 09:55:43

Hi Chris. The trouble is, youngsters need money more than terms and conditions so they switch. Once it's done it usually stays done. Terms and condition get more important as we get older. The UK has generally never been that good at rewarding productive people early enough in their careers.

regards Martin

Thread: Next MEX 2018
16/03/2017 09:49:46

Purely as an observer, and I do get to most of the shows, I think that the organisers of MEX have probably made a good decision for once. It seems to me to be fairly clear that MEX is long past being able to compete with the other shows on a like for like basis particularly when competing for a dwindling attendance of Trade Stands. Therefor the only real choice is to become something really different or cease to exist.

The syngergy between a museum and an exhibition is beneficial but for that to work the venue has to change each time which is achievable. As was mentioned 2 years does give more time for exibits to change. So having managed to shake off the crowds and the Trade by some bad choices in the past, and that's easy to say with hindsight, hopefully a new future can be built by doing something different. So the best of luck with it I say.

regards Martin

Thread: Are we the last generation.?
16/03/2017 09:00:40

Pretty much for my entire career (Electronics engineering) the situation was that if you wanted better pay and promotion you had to switch to management. There have always been some attempt at creating senior specialist posts but it never really works that well. My current job is the only one I have found that doesn't suffer from this issue. We are essentially self managing. We do have a workshop head but he gets paid the same as the rest of us. Sort of what Monty Python called an autonomous collective or an anarco-syndicalist commune. Scientist just come in and ask one of us for a job to be done and we do it.

It's interesting work but no-one is going to get rich on it especially with the permanent public sector pay freeze.

regards Martin

Thread: Nut & Bolt Sizes.
14/03/2017 15:06:06

Don't forget the old BSL series

Martin

Thread: Lidll
10/03/2017 11:19:15

Perhaps you should buy a DUWK John. You can inflate and deflate from the drivers seat without moving.

:0)

Martin

Thread: Are we the last generation.?
09/03/2017 15:18:22
Posted by larry Phelan on 08/03/2017 11:30:57:

Some time ago my nabour,a carpenter,asked me if I might be able to repair his saw bench,an old De Walt model [Well he thought it was old at 20 years,I have my home made saw bench for the last 50 years,home made because at the time,I could not afford to buy one ] . Anyway what had happened was that the thread on the shaft to which the blade was fitted had become damaged,

I was even lucky enough to find a Whitworth nut to suit,in my junk box [never throw out anything ] Result for a little time and effort, the machine is now back up and running.

Just read this and I have to ask, was the nut originally left hand thread? The saw benches I have come across are. I assume as you say you 'found a nut' your fix was probably a right hand thread. It's worth checking as I would say it's a bit safety critical. If it was a left hander it may explain the messed up thread. Perhaps the original got lost and someone wound something a little bigger on it ? As I say I could be wrong but the warning bells started as soon as I read the post.

regards Martin

09/03/2017 09:32:57

Industry does not do things for fun, we do. Some people like CNC and the rest of the Hi tech others enjoy more ancient techniques. I work with a bloke who like to run a pole lathe for wood turning. So long as there are manual machines to be had people will use them. On a more practical level how do you imagine you would get by without some manual capability. Some perhaps many tasks are going to take longer. Is there any one on this forum who has a totally CNC workshop?

regards Martin

Thread: Einstein theory of relativity
06/03/2017 11:06:22

re Bill and Jon :-

Perhaps we need to recognize the difference between elapsed time and actual time. When sleeping we do go through cycles of deep and shallow sleep so there are periods when we are conscious enough to be aware of external cues but still in a "sleep state". Even internally to the extent of being aware that "it's a Saturday and there is no work" or "today is the day I need to go to London".

Your brain chemistry will modulate your level of consciousness (sleep wake cycle) but your consciousness can record the passage of time by memory of events. When unconscious or in deep sleep we are most unaware of external events and have no notion of the passage of time. The brains body clock provides the rhythmical timekeeper to begin to bring us back out of a sleep state into wakefullness. Certainly there is a lot going on in the pre-wakefull state and it is reasonable to suggest this can accelerate or not whether we become full awake sooner. I would suggest trying to wake without putting your alarm clock on for a time when you are normally fully asleep is prone to failure.

Try asking the question the other way round. When you don't have the alarm clock on and you wake up how good are you at knowing how long you have slept before you have looked at the clock. Be aware that you get other clues like birds singing, how light it is etc. We have all certainly been startled by how late it is when we have slept in.

This is a fascinating subject and most definitely complex.

regards Martin

Thread: What Did You Do Today (2017)
01/03/2017 14:56:19

Huh.

Followed a diesel volvo estate into work this morning and the amount of smoke that was generating would have satisfied Admiral John Jellicoe in a major fleet action. Hope you fish smells sweeter.

regards Martin

28/02/2017 12:33:02

The moment may well stay the same but the force on the hold down bolts on the vice will change. You have two levers acting in opposition, one being the wood and the other the vice. As Sam suggested a bit of material right next to the nail to act as your fulcrum will change things enormously. May even have worked just with your vice and the length of wood. Just as you increase the mechanical advantage of the lever on the nail you also increase the mechanical advantage of the vice bolts on the nail.

regards Martin

Thread: How to mount a myford vertical slide
27/02/2017 14:12:17

Myford did a raising block for vertical slides like this:-

**LINK**

I'm not suggesting you buy one, unless you can find a 'cheapie' but should give you the right idea for an adaptor plate.

regards Martin

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