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| Minnie on the cheap! |
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| awemawson:
Norman, I seem to recall that you said that this was a display model rather than a working one, in which case it doesn't matter a lot :med: |
| NormanV:
Well I would like to run it on compressed air. |
| eskoilola:
The dude who sells HSS steel blanks was not in the flea market today as I suspected. He will be in the other loaction next saturday. |
| NormanV:
I was busy over the weekend, I made the chimney. I cast a piece of aluminium using the lost foam method, what a lot of nasty fumes that produces! It was a terrible casting, barely big enough and full of bubbles. What the heck, it's going to be painted so I can use filler to hide the defects. The chimney cap was fun, I made it from two pieces of 1/4" brass silver soldered together. I've finally worked out how to use my gas torch, outside of the furnace, without it blowing out. It was an interesting diversion from machining to work out the angles to rough out the two curves, my trigonometry tables from my school days came in handy for that. |
| NormanV:
I fabricated the chimney base rather than buying or making a casting, I was able to do it more quickly than it would have taken to make the pattern. I had to cut a large radius in the base of it and was rather pleased with my setup. I mounted it on a piece of angle on the faceplate, which needed counter balance weights to prevent vibration. I used my 1" square boring bar to hold the cutter, there were no problems with chatter. |
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