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I recently bought my first 3D printer (resin type) and I too found my parts loaded tiny. The slicer probably has a feature for scaling (mine does). I don't now why but at some point the files loaded in the correct scale. The scaling feature is handy for allowing for shrinkage. I watched a lot of...

I would like to see that. I have wondered if your species has the same number of fingers as we humans. And what are you doing up at 2:10 AM Richard? Mark T

I do some casting and I get bronze propellers, and other marine fittings from a boat repair yard. Most are aluminum bronze. You can tell if its aluminum bronze because it is slightly magnetic. Very slightly, clean and polish the area to be tested. Mark T

Thanks Andy. And thanks to all of you that have been following along. I will post updates as I figure out how to use the furnace for use as a burnout oven.. News Alert. I have been watching the deployment of the mirror of the James Web Telescope all morning. The mirror was just successfully...

Nice to know. It was the only marking on the box that looked like it might indicate who made the unit. Must be a generic knock off of some kind. Mark T

A friend gave me a black powder cannon with a one inch bore years ago. I set it up between my house and my shop building. Put some powder in and rammed it tight with a toilet paper wad and no projectile. When I lit the fuse I stood back and there was a BIG Boom followed by the noise of breaking...

The element turns out to work perfectly. And it heats the oven far faster than what you would want, but the PID controller takes care of that. The controller will turn the current on and off to the element to control the rate of climb to whatever you want. And the 3300 Watt element can easily...

Here are some photos of the completed furnace ready for action. I made an exhaust hood for it that directs the exhaust to the inlet of the exhaust fan in the hood above my bench. Mark T

I don't know what that is. All I know is that it is a "K" type with a top limit of 2372 degrees F Mark T

It is but you were not supposed to notice until I post a photo of it tomorrow. It collects the fumes and a fan blows them up a 4" duct to a blower that vents to the outside. Mark T

That sucks. I refuse to buy from a business that refuses to sell to me. Mark T

Hi I use cast iron from McMaster Carr and it makes very nice rings. their smallest rod is 1.25 inches and cost is about $17 for 12". Mark T

I stretched my resistance coil out to 54” long and installed it into the groves cut into the bricks and secured it with wire pins with a hook on the end. I used the same wire the element was made from. By design my heating element was to have 14.67 Ohms resistance. I used an Ohm meter and...

Here is a link to the Amazon page I ordered the controller from Ramp Soak Temperature Controller Kiln SSR Thermocouple Programmable Control 60 Segment: Amazon.com: Industrial & Scientific The PID controller I bought was made by RoHS. Nice unit but the manual if you can call it that was...

So there you go, the frame is all painted now and the unit is wrapped with ceramic insulation and the sheet-metal shell is installed. And a vent hole has been drilled into the top. The vent hole is required for the burn out process to promote burning and to expel any soot. Soot will conduct...

The piano wire wraps around the furnace sides and over the top to insure the bricks stay in place if the unit is ever tipped over onto its sides or back. I originally thought the sheet-metal shell over a 1/2” ceramic blanket insulation would be all I would need to hold everything together but...

When I built my Holt I made my rings as you did and I made an interesting observation. Before heat treating I wrapped the rings with thick paper and secured it with scotch tape. I then covered the fixture with the rings with very fine "olivine" sand to help reduce the oxygen around the rings. I...

I think cleaving is the act of creating cleavage but I'm not certain of that. I mean I don't know that as a fact I just know its true. Mark T

The refractory cement requires 6 hours of firing at 350 degrees F. before it comes up to full strength. I was able to do this with the kiln floor and the door by placing them in the wife's kitchen oven. The top of the kiln will get fired in place when the unit is completed. After firing the...

Next step, the walls are fitted into place and the groves the element will ride in were drilled for the hooked pins that will hold the element in place. Also the hole for the thermocouple was drilled into the floor and the holes for the element's leads were drilled into the back wall. I drilled...