FINEFUZZ Posted May 23, 2018 Author Report Share Posted May 23, 2018 1 hour ago, Prostheta said: In all likelihood, yes. haha How did the shrinkage work out? Have you calculated that yet? It shrank in a very uniform manner and didn't potato chip much at all. I haven't measured the shrink yet, but I will take a look at that this evening by comparing it to the master. Quote Link to comment Share on other sites More sharing options...
Prostheta Posted May 23, 2018 Report Share Posted May 23, 2018 What's the theoretical percentage? It'd be interesting seeing how close that ties up. I'm curious as to whether shrinkage introduces distortion as well....after all, the negative in the sand doesn't shrink and I imagine the cooling metal would pull that apart. Quote Link to comment Share on other sites More sharing options...
FINEFUZZ Posted May 23, 2018 Author Report Share Posted May 23, 2018 57 minutes ago, Prostheta said: What's the theoretical percentage? It'd be interesting seeing how close that ties up. I'm curious as to whether shrinkage introduces distortion as well....after all, the negative in the sand doesn't shrink and I imagine the cooling metal would pull that apart. I honestly do not know what that number is, but both the wax and the bronze experienced a percentage of shrinkage. I can measure the distance from the bottom flat edge of the bridge pickup cutout to the center point location of one of the bridge stud holes to get a number that will give me a good enough idea what the difference is. I do know aluminum's shrinkage it is .0156" per inch. Quote Link to comment Share on other sites More sharing options...
Prostheta Posted May 24, 2018 Report Share Posted May 24, 2018 On casual Googlation, it seems that 1-2% with a tendency towards more rather than less is the expected range so perhaps a little more than aluminium. Quote Link to comment Share on other sites More sharing options...
FINEFUZZ Posted May 24, 2018 Author Report Share Posted May 24, 2018 (edited) I took some measurements. Firstly, the shell is actually measuring close to .125" thick, it just seemed thicker to me. For the two images above: measuring 1.279" compared to 1.290" = .011" difference (this is not exact) For the two images above: measuring 2.840" compared to 2.842" = .002" difference (this is not exact) I will take a picture of the bronze piece sitting inside the silicone tool at some point to give a visual sense of the shrinkage. Now that I look at these images, I really should have taken the measurement of the distance between both bridge post hole locations. Edited May 24, 2018 by FINEFUZZ Quote Link to comment Share on other sites More sharing options...
FINEFUZZ Posted May 24, 2018 Author Report Share Posted May 24, 2018 alright, I measure the distance between the center points of the two bridge post studs: 3.085 on the bronze and 3.1248 on the master. That distance shrank by .0398" -so about .013 percent of shrinkage 1 Quote Link to comment Share on other sites More sharing options...
Prostheta Posted May 24, 2018 Report Share Posted May 24, 2018 That doesn't seem bad at all! I wonder if the thin-ness of the piece has much to do with that. I'm fascinated about new processes that I haven't tried myself. It sounds like there shouldn't be too much of an issue with geometry altering. That can only be a good thing. Quote Link to comment Share on other sites More sharing options...
Splintazert Posted June 18, 2018 Report Share Posted June 18, 2018 For those of us following @FINEFUZZ's unique thread with interest, I thought I'd share this new video from the British Museum that shows some steps in the process, taking us from clay modelling to the finished piece: 1 Quote Link to comment Share on other sites More sharing options...
Prostheta Posted June 18, 2018 Report Share Posted June 18, 2018 Good call! Lie Nielsen also have a video doing their plane bodies being made in a similar fashion. Quote Link to comment Share on other sites More sharing options...
Splintazert Posted June 18, 2018 Report Share Posted June 18, 2018 Thanks @Prostheta, just watched it and it goes some way to explaining their high price. Quote Link to comment Share on other sites More sharing options...
Prostheta Posted June 19, 2018 Report Share Posted June 19, 2018 The same applies for most well-cast items. We have cast iron Le Crueset cookware which commands high prices much the same as Lie Nielsen planes. Quote Link to comment Share on other sites More sharing options...
FINEFUZZ Posted June 20, 2018 Author Report Share Posted June 20, 2018 Thanks Splintazert, That video does illustrate the exact process I followed. The only difference is my process is much sloppier and typically involves damaging whatever clothing I am wearing. Quote Link to comment Share on other sites More sharing options...
FINEFUZZ Posted June 20, 2018 Author Report Share Posted June 20, 2018 On 6/18/2018 at 2:17 PM, Prostheta said: Good call! Lie Nielsen also have a video doing their plane bodies being made in a similar fashion. That is an interesting video as well. I have not seen the tool that is used to do the first surfacing operation prior to the flywheel surfacing before. Foundry work is fun to watch, but there are so many elements of the process that make it very dangerous. I used to do pattern work on core boxes that belonged to a railroad foundry and I never envied the workers who had to do the iron casting. North of my house by half an hour is the Kohler headquarters where one can tour the different facilities form porcelain work to iron casting. Seeing them construct a cast iron bathtub is something to behold. Quote Link to comment Share on other sites More sharing options...
FINEFUZZ Posted July 28, 2018 Author Report Share Posted July 28, 2018 progress... 1 Quote Link to comment Share on other sites More sharing options...
FINEFUZZ Posted July 28, 2018 Author Report Share Posted July 28, 2018 This is a guitar pedal design I am working on- 1 Quote Link to comment Share on other sites More sharing options...
boeba Posted July 29, 2018 Report Share Posted July 29, 2018 Loved going through this topic. I really liked your approach starting from computer to 3d print to the bronze casting.It's funny i just found this topic now since i just started something similar on this forum. Keep up the cool work. Quote Link to comment Share on other sites More sharing options...
Prostheta Posted July 29, 2018 Report Share Posted July 29, 2018 Shades of the Dr No Skull Fuzz...? I think it's both hilarious and an awesome idea. Quote Link to comment Share on other sites More sharing options...
FINEFUZZ Posted July 30, 2018 Author Report Share Posted July 30, 2018 Yes, knew about the DrNo Skull, but I didn't realize how awesome the eyeball knobs were until now. Quote Link to comment Share on other sites More sharing options...
Prostheta Posted July 30, 2018 Report Share Posted July 30, 2018 So completely over the top! Quote Link to comment Share on other sites More sharing options...
FINEFUZZ Posted March 18, 2019 Author Report Share Posted March 18, 2019 Spring is approaching, and I am getting back to progression! Quote Link to comment Share on other sites More sharing options...
FINEFUZZ Posted March 18, 2019 Author Report Share Posted March 18, 2019 and here is a shot of the back after the rough pass- 1 Quote Link to comment Share on other sites More sharing options...
Prostheta Posted March 18, 2019 Report Share Posted March 18, 2019 Whoa....what was the stepover on that?! Sub-millimetre? Quote Link to comment Share on other sites More sharing options...
FINEFUZZ Posted March 18, 2019 Author Report Share Posted March 18, 2019 I think it was .25mm- which was a tad over-kill. For now, I am leaving the blocks on the sides of the neck for places to clamp the fingerboard on. Quote Link to comment Share on other sites More sharing options...
mistermikev Posted March 18, 2019 Report Share Posted March 18, 2019 51 minutes ago, FINEFUZZ said: and here is a shot of the back after the rough pass- i saw this and was like "why is there a bit dowel sticking o.... oh. genious". that headstock is off the hook. have never been to port washington (that I know of) but like anywhere else in wi... I'll assume this was all fueled by brats (hehe - go pack go)! Note to self: buy brats... lots of brats! 1 Quote Link to comment Share on other sites More sharing options...
FINEFUZZ Posted March 18, 2019 Author Report Share Posted March 18, 2019 (edited) Not only do we have brats, but the brewery here makes a "Wisconsin poutine" which has brats cut up into it with deep-fried cheese. Edited March 18, 2019 by FINEFUZZ Quote Link to comment Share on other sites More sharing options...
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