Skew ChiDAMN!!
25th April 2007, 07:31 PM
The Nunawading exhibition is coming up and I've left my run a bit late for this year. :- Actually, I've made a few pieces to enter but none of 'em turned out as desired and I don't see any sense in wasting entry fees on 'em. :rolleyes:
So, I've started on a concept piece, a "petalled" goblet. Because of the way I've done it, I can't reverse chuck it to turn the underside of the petals... You can see from this pic that I turned the bowl very, very thin, less than a mm in fact! I guess that's pretty obvious from the gaping holes in the side, but believe it or not they are deliberate. :p The lip is quite a deal thicker, but once the piece comes off the chuck that'll bve carved too, to form a scalloped edge of the same thickness.
44765
I hollowed under the petals as far as I felt safe, then trimmed away the excess from the wings so I could better see how to proceed. Now I've come to my problem...
44766
The 6mm square bedan (which I've reprofiled to an 85° scraper for just this job) is the only tool I have which fits the clearance available. :( Even then, from the pic you can see that the handle is hard up against the headstock and the ferrule/top end of the handle is rubbing against the chuck. (I'll have to make a new handle after this. [sigh])
Because of the long overhang, about 2½-3", and the thin tool steel chatter is extreme, to say the least. Not something I want to try finishing cuts with, nor do I particularly fancy having to hand sand in there if I can't cut it cleanly. I've tried a swan-necked Oland-style tool, but for some reason it persist in grabbing badly. Those petals are also pretty thin and I don't particularly wish to glue 'em back on later. I suspect this is because I'm both going straight into end-grain and it's impossible to present the cutting edge at the correct angle.
So... I'm open to suggestions. A different tool? A safe way to reverse mount so I have better access? Help? (Something tells me I may not have any show entries this year...)
PS: I also thought of using a donut chuck, but the bowl is really, really thin. It won't take much pressure to crush it along the grain, either. Wish I hadn't thought of going that way. :(
So, I've started on a concept piece, a "petalled" goblet. Because of the way I've done it, I can't reverse chuck it to turn the underside of the petals... You can see from this pic that I turned the bowl very, very thin, less than a mm in fact! I guess that's pretty obvious from the gaping holes in the side, but believe it or not they are deliberate. :p The lip is quite a deal thicker, but once the piece comes off the chuck that'll bve carved too, to form a scalloped edge of the same thickness.
44765
I hollowed under the petals as far as I felt safe, then trimmed away the excess from the wings so I could better see how to proceed. Now I've come to my problem...
44766
The 6mm square bedan (which I've reprofiled to an 85° scraper for just this job) is the only tool I have which fits the clearance available. :( Even then, from the pic you can see that the handle is hard up against the headstock and the ferrule/top end of the handle is rubbing against the chuck. (I'll have to make a new handle after this. [sigh])
Because of the long overhang, about 2½-3", and the thin tool steel chatter is extreme, to say the least. Not something I want to try finishing cuts with, nor do I particularly fancy having to hand sand in there if I can't cut it cleanly. I've tried a swan-necked Oland-style tool, but for some reason it persist in grabbing badly. Those petals are also pretty thin and I don't particularly wish to glue 'em back on later. I suspect this is because I'm both going straight into end-grain and it's impossible to present the cutting edge at the correct angle.
So... I'm open to suggestions. A different tool? A safe way to reverse mount so I have better access? Help? (Something tells me I may not have any show entries this year...)
PS: I also thought of using a donut chuck, but the bowl is really, really thin. It won't take much pressure to crush it along the grain, either. Wish I hadn't thought of going that way. :(