Jumat, 19 Februari 2016

Hollys Bowl Part 1 Roughing out the blank

Hi Everyone,
Well we got quite a bit of snow last night from a storm that has been moving across the American Mid West. I think we got about 6-7 inches of snow over night. Heres some photos:
Here are some icicles hanging down from the roof. It looks like a frozen waterfall:
Big snow drift about 4 1/2 feet high:
This is a planter in my front yard:
Ill try and get more photos over the next day or two.
Ok, back to work.
Here is a close up of the blank on the lathe. Ive been turning it for a couple of minutes and if you look carefully youll see the sharp edge has been turned off. As this blank is heavy and irregularly shaped, it has to be turned slowly at about 200 rpm. Im going to be cutting from the bottom towards the top so as to gently cut away at the surface at an angle. Trying to cut straight into this blank at this stage would cause the sharp end of the roughing gouge to dig into the spinning wood, causing what is called a "catch." This would probably tear a big chunk out of the side of the blank and also flip the tool out of my hand. Not fun:
This is a photograph of the tool Im using-my old faithful Robert Sorby roughing gouge. Ive just re-sharpened it:
This is the blank after about 10 minutes of turning. You can see the surface of it rounding off:
This is about 30 minutes into the turn. In the photo you can see the straight cut surfaces from yesterdays rough blank still on the blank in the photo. These will be eventually smoothed off and the bark on the bottom of the blank will be removed as well:
This is the blank about 45 minutes later:
This photo shows the wood that is being turned off. Its small chips and thats a good sign-it means the wood is dry. If the wood were still wet, it would be coming off in long strips:
In this photo Im getting ready to turn off the bark on the bottom of the blank. Ive moved the tailstock off the lathe. Until the blank is completely roughed out, Ill have to gently shave off the surface of the blank slowly and carefully while the tailstock is off:
Several minutes later. You can see how the bark is slowly being removed. I will need to completely remove the bark and get to solid wood so I can flip over this blank and hollow it out. Ill need solid wood to re-mount the blank on the lathe:
Aha! Solid wood on the bottom:
 Here is the final rough shape of the blank. Ive unscrewed it from the lathe so I can see accurately what it looks like.
This blank is going to be narrow and deep and so next Im going to research some bowl shapes that match the general shape of the blank:
Well, so far so good. Ive dropped the edge of the blank on my right index finger while unscrewing it from the lathe and my finger is turning purple and it stings. I think Ill stop for today and go put some ice on it.
See you tomorrow,
VW

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