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Frederik-W

Member Since 02 Jan 2012
Offline Last Active May 03 2014 04:53 AM
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Posts I've Made

In Topic: Craft Is Good; Crafter Is Not -- Cerf+ Survey Results

03 May 2014 - 04:52 AM

It is not surprising to me at all that the survey clearly shows "artist" being preferred to "craftsman/craftsperson".

So there is definitely still this thing between "art" and  "craft".

 

It seems to me the term "craft artist" is an attempt to avoid the destinction between art and craft.

Who uses this term? No-one I know refers to himself/herself as a "craft artist". (But who do I know anyway?)

Could it be that some crafts people feel that adding the word "artist" adds a bit more status ?

Could it be a genuine attempt by people whose work is a mixture of art and craft ?

 

"Crafter" is just a stupid word, in my humble opinion.

 

I respect craftmanship and I appreciate art, but I do not respect the rubbish that is often presented as "art".


In Topic: Kiln Flue Gas Analysis

27 November 2013 - 06:12 AM

I built a system like that for a gas kiln,

but the results were not very good because the sensor was situated in the kiln flue and the flames made the readings fluctuate a lot.

Also the common (cheaper) variety of sensors are very non-linear - i.e. they are designed to go from hard-on to hard-off, and you do not get much in-between. So the accuracy of your readings suffer.

I still want to improve on this but I am too busy with other things at the moment.

The newer "wideband" type of sensors are accurate and give a more linear output put the electronics to build one is more complex and if you buy a ready-built one (for cars) they are quite expensive (for someone like me).


In Topic: Another Pricing Topic

20 November 2013 - 07:49 AM

"I price my cups this way so that more people will be able to afford my pots".

 

That is a noble idea, clearly for you not everything is about business and profit. I would like to raise some ethical issues here.

 

I read somewhere on the forum that you should not change your price because you might upset customers.

I think the idea is that it won't be fair if different people get charged different prices.

Good point, but there is also another point: The fact is that some people can afford to spend a lot on art and others cannot.

A lot of people who have limited income (through no fault of their own) do appreciate art and fine craft and would like to own something decent.

I am NOT saying that everyone should be charged differently though, and I am NOT saying that potters should live in poverty because they should dish out all they have to the poor.

 

I think a lot depends on how you view your work and what it means to you. A lot of artists died very poor because business was not their priority or because people did not recognise their work at the time, while others have made large profits by selling anything to whomever paid the highest price.

 

If I was an artist (and not in a bad financial situation) and someone really likes and appreciates my work but cannot afford it, I would definitely negotiate a good deal for him/her.

There are many rich people who buy art simply because it is an investment and not because they appreciate the work at all.

It might be very flattering if someone like that "invest" in your work, however it would leave a sour taste in my mouth if I knew the person has no taste or appreciation and is only buying it as an investment. Some artists would go as far as to refuse to sell to some customers and some donate some of their work to art galleries or art foundations rather then sell it.

 

Hypothetical scenario:

Say you normally sell through a gallery in an affluent area and you get good prices for your work. You then go on holiday to a little place on the coast. You decide to take a few pieces of your work with you to sell at the local arts & craft market.

You find the small community appreciates your art/craft a lot but it is clearly not the place where people can afford what you normally charge. What would you do?


In Topic: Misleading Representation

18 November 2013 - 06:05 AM

Now is this misleading or what ?

The famous graffiti artist Banksy made a point by deliberately selling his paintings unonymously at a street stall :

 

"Unsuspecting tourists who thought they were buying cheap Banksy knock-offs have scored the bargain of a lifetime after the elusive street artist revealed the paintings were really his.

Banksy used an anonymous old man to sell several of his original works for US$60 ($63.60) from a stall in New York's Central Park on Sunday.
The paintings are actually worth around $42,400 each".

 

Quote from Sydney Morning Herald,

Read more: http://www.smh.com.a...l#ixzz2kzelgsGy


In Topic: Need Some Help From Somebody Who Knows About Kiln Electrics.

12 November 2013 - 06:37 AM

Yes there are 6 top elements and 4 bottom elements linked up to the two relays, it was the top relay that went with the 6 elements. It looks like the elements are wired in parallel pairs.

 

From learning my basic physics again there should be more current going through the top relay as there is less resistance overall. I don't know if this helped the relay come to the end of its life or not.

 

Each relay should be around 15A but I haven't worked out what the difference between the two are. No idea what resistance each element has. I don't know if it works this way but the 110V difference divided by the 5A makes just over 20V an amp so then 240V it would take 19A which I would assume I am not over.

 

What happens if you do overload a relay?

 

The top element (with 6 elements) will carry less current because it it is longer and therefore has more resistance.

( I = V/R where I is the current, V the voltage and R is the resistance).

However this is not always the case. If the top element uses e.g. thicker wire with less resistance than the bottom one, you cannot compare simply based on length.

A kiln might e.g. use one type of wire in the door and another type in the walls of the kiln.

Different sections are then connected in series and/or parallel to load a 3-phase system equally.

 

You can measure the resistance with an ohm-meter (multimeter) to get some idea what the relative resistances are, but the resistance changes when the elements get hot.

If you overload a relay the contacts spark and get pitted and can then stick together when it switches. This can happen over time.

There is no harm in using a slightly bigger relay  e.g. 20, 25, 30 Amp- just to be safe. As long as the controller can switch the relay coil.