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Bob Coyle

Member Since 06 Jun 2013
Offline Last Active Yesterday, 07:43 PM
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Posts I've Made

In Topic: How Do You Make A Bird Bath?

Yesterday, 07:43 PM

I'm not to worried about the squirrels... The neighbors bird bath was knocked over by a bear. 

 

Thanks for all the good advice. I'll have another go at it and try out some of the suggestions.


In Topic: Small Rock Crusher

05 March 2017 - 11:29 AM

The proximity of your hand to the belt drive in the vid,  looks like an accident waiting to happen. Maybe you should move over to the other side to dump the rocks in.


In Topic: Kiln Not Reaching Temperature

02 March 2017 - 02:55 PM

Sounds pretty strange that an element would have cold areas.  The same current will be flowing through the entire element.  I have had places where the element was thin, and glowed hotter than the rest of the coil, Maybe that is what you are seeing. It is usually isolated to a small section.

 

The only way you can know if the element is not pulling enough current is measuring resistance of both elements. If one is way high, then there is a problem.

 

Another place to look is the relay in the controller. If it is getting overly hot during the run, the amount of current it can pass goes down. This happened to me once in a setup I did where the fan cooling  the relay was not strong enough. If it is a solid state relay,and getting up to temperatures greater than about 170F then you may see a drop off as the kiln heats up.

 

Can't think of anything else... measure the resistance, otherwise we all are just guessing.


In Topic: Kiln Not Reaching Temperature

01 March 2017 - 07:33 PM

A six meter cord, if it is not the correct wire diameter,  May give you a voltage drop that will cause the kiln to not get as much current to drive the elements.

 

If the cord gets hot to the touch when you are firing, then it may be a problem.

 

If you are running 15 amp wire for a 13 amp kiln, then  6 meters is pushing it.

 

 Ohms law       i= e/r 

 

amps = line voltage/ element resistance.

 

measure the total resistance of the kiln by unplugging it and turning on all elements to high. measure directly across the plug at the kiln 

 

if the line voltage divided by the measured resistance doesn't give you pretty close to 13 amps then you have a problem.

 

Try the same same thing with it plugged into the long line. Measure at the end of the line and see if you get a difference.

 

If you don't know what I am talking about...don't even try it.


In Topic: Glazing

26 February 2017 - 07:38 PM

A very good start for dip and pour, but I do short glaze runs and only make enough to brush on... a whole new ball game. If I would give advice on brushing, the main thing I would say is keep the glaze thick, and try to "flow" it off the brush rather than painting it on like you would do a wall in the house. That way you do not have to do it twice, and You don't get streaks.

 

The key to a "flow" is to load up the brush and stop brushing when you feel it begin to starve out and pull against the clay. Load up again immediately and try to keep a "wet edge" (as the house painters say) against the last brush stroke. Thick glaze minimizes streaking since the glaze tend to level over the surface as it fluxes and becomes fluid.

 

PS ... dip and Pour are the way to go if you are doing production runs.